Show HN: I've built a C# IDE, Runtime, and AppStore inside Excel

667 points by anakic 6 days ago

The project is called QueryStorm. It uses Roslyn to offer C# (and VB.NET) support in Excel, as an alternative to VBA. I've posted about it before, but a lot has changed since then so figured I'd share an update.

The current version includes a host of new features, namely a C# debugger, support for NuGet packages, and the ability to publish Excel extensions to an "AppStore" (which is essentially a NuGet repository). The AppStore can be used by anyone with the (free) runtime component.

Another great addition is the community license, which is a free license for individuals and small companies to use. It unlocks most features, but it isn't intended for companies with more than 5 employees or over $1M in annual revenue.

I would love to hear your feedback and am happy to answer any technical questions about how QueryStorm is implemented.

anigbrowl 5 days ago

A fine example of what caffeine has done to our great nation's youth. What could have been an obscure command-line interface enjoying a modest but dignified place in the field of traditional operating systems is instead condemned to the gridded prison of automated balance sheets under the beady eyes of our financial overlords.

Jokes aside, this is an amazing achievement, the more so for being realized by a single person working away patiently for years - truly inspiring. And it brought out a wave of nostalgia for a former life where I made a living building bespoke tools in the (pre-VBA) Excel macro language. All that and solid business sense too! I hope companies shower Antonio with money, and that Microsoft either leaves him alone or rewards him with gold and the autonomy to lead technical product development for the long term. It's rare to see such a singular combination of vision and execution, doubly so in a very mature product space belonging to a global megacorporation.

brushfoot 6 days ago

This is excellent. I can see buying it for my business. We already use Excel extensively for the open file format; that it's local first; that it's just a file; the low ceremony of getting started; the multipurpose grid for code, data, and presentation; the ubiquity.

The more low-code/no-code SaaS products I've tried, the more I value it. LC/NC SaaS generally is expensive and inflexible. Everybody knows Excel, it's dirt cheap, and it just works. It's part of a certain IT subculture to bash it, but I stopped laughing along.

Excel is great at what it does. Love seeing clean solutions like this that give it even more muscle.

  • beached_whale 6 days ago

    I love how approachable it is. Domain experts in other fields are able to program in excel and codify their knowledge. While, not always great in terms of code quality, often it is bad, it still provides a great starting point in moving to something more resilient and safer in terms of data validation.

    There is a reason it is the worlds most poplar programming language

    • redavni 6 days ago

      "most poplar programming language"

      In your opineion.

      • indrora 5 days ago

        Not just in one HN'ers opinion.

        The thing is: Excel is one part data store and one part programming interface. The programming interface just happens to be a part of the data store. This leads people who have been told they're not allowed to program to solve the problem with the best tool they can hold: Excel.

        I once got an email in my inbox that had the subject "Help: recommendations for machine to run Excel". The body described a person within a business unit who had a laptop, ca. 2018, with a then current I7, 32G of RAM, dual raid10 SSDs, and it had one job: Open, edit, and evaluate one 5+GB Excel workbook.

        This workbook took twenty minutes to open.

        It's so bad Microsoft actually gave some level of proper functional programming to Excel:

        What happens is this pattern where more applicable programming models are taken from business folk, who need a way to do some level of broad, tabular accounting usually. These individuals don't have Python, don't know Python, or web applications, etc. What they have is Excel.

        Excel lets you do something very easily that no other thing in existence lets you do: Real time (ish) calculations against very large sets of data. I can write one cell, `=AVERAGE($A9:$A99)` and get the running average for 90 rows in a table. Imagine the work that would go into doing that in a language like Python or Go, plus the scaffolding to make it work in a webapp.

        And so when a business unit says "we need a way to do X", inevitably someone says "there's no budget for that" and someone eventually finds their way to Excel. Then they build the thing in Excel and when someone realizes they have a monster on their hands someone inevitably says "this should be a webapp" at which point nobody has the funding to maintain that webapp plus its infrastructure, plus handling the implicit and explicit logic that comes along with the mixture of data, code, and everything else in an Excel spreadsheet.

        • beached_whale 5 days ago

          I think a lot of the issue with Excel is the developers, often, look down upon it. This is too bad as it doesn't help those using it to solve real world problems and it often leads to them not seeking help. Then we end up with the billion dollar London Whale's.

          • ozim 4 days ago

            I don’t look down upon excel I look down upon development practices inherent to excel.

            No proper way to collaborate with version control. No real change control either - Joe can have version 1.4 Bob still 1.0 - version from Bob making loses for the company.

            No real way to debug like getting to know where cell is used is impossible.

            That said excel is powerful and I also use it for personal stuff or stuff only I need to calculate.

            When I have more than 5 people using and changing the same excel all is lost - maybe office 365 helps with collaboration but it still needs a bit more features.

            That said excel is awesome on its own - single spreadsheet with complex calculation used by more than 5 people is recipe for a disaster.

            • beached_whale 4 days ago

              I use it for quick table to code codegen often. But it wasnt about you personally just the comment’s people make about it. With onedrive people do get a sort of versioning, albeit very crude, too. But your right, the practices are bad and part of it is people are not having conversations about best practices. Also, the cost of development being what it is and people’s incentives, Excel fits into that just get it done and deal with it later spot. I know in my org it was a minimum of 50k to get a dev shop, internal, to do a project. This was years ago too. Too many big fish for them to work on. So the small groups went with what they could use. Also, it is on all machines.

        • goosedragons 5 days ago

          I think with Numpy and Pandas getting the average of 90 rows wouldn't be too hard. With R it's insanely easy: mean(data[9:99,]). I'll admit Excel is a easier for the average joe to get started with but there's a lot of downsides like it being relatively difficult to figure out WTF a sheet is doing at a glance.

        • redavni 5 days ago

          Sigh...reread the posts.

          But here is a hint.

          How do trees access the internet? They log in.

          • beached_whale 5 days ago

            It was informative though, but maybe next time precede with something like funny typo. Us as a group are easy to trigger into helping those wrong online :)

          • loco5niner 4 days ago

            Ooooooh... Whoosh. Missed that the first time. undown/upvote

  • anakic 6 days ago

    Hope you give it a go. I'd love to know how you get on with it if you do!

OJFord 6 days ago

Oh a plug-in, ha, for some reason I read the title and thought this was a 'just to show I can' type implementation of all those things actually in Excel, 'Doom in Excel' sort of thing.

This seems far more useful!

  • whoisthemachine 6 days ago

    I also thought this was going to be an article about implementing a C# compiler in excel! This on the other hand seems like a very neat product.

    • anakic 6 days ago

      Thanks! Yeah, I probably should have made the title " Excel" instead of "...inside Excel". I wonder if more or fewer people would have clicked on it that way.

      • maxfurman 6 days ago

        If we're being pedantic maybe "for Excel" would be clearer? But what do I know.

        • hoseja 6 days ago

          That would be my choice too. Both "inside" and "in" imply "in the spreadsheet". "For", on the other hand I would understand as "for the Excel program".

        • anakic 6 days ago

          I was considering "for" but I wanted to imply that the IDE is actually located inside Excel, rather than being a separate program.

      • yAak 6 days ago

        Yeah, I thought you crafted some Excel monstrosity based on the title. Maybe a mod can change the title for you to say "for Excel."

        Also, I would be super proud if I'd created this. Excellent work!!!

    • the_only_law 5 days ago

      I would have been both immensely impressed and immensely horrified if that were the case.

  • lofatdairy 6 days ago

    I had the same thought lol. Honestly, the fact that such a thing seems possible at all should be props to the people who built Excel

samsquire 6 days ago

This is absolutely awesome.

The combination of a spreadsheet, database and data scripting runtime would be extremely powerful.

This is where Airtable, nocodb and baserow are candidates.

I worked at a company that used gridgain with Excel as a cluster to process models on lots of servers.

I suspect there's a lot of low level Windows integration details about how to integrate with Excel. COM objects and DLLs.

Why is integrating with software so difficult? Very few people know how to do it.

How you design software that is extensible?

Atom was extensible and VS Code is less so.

Why has nobody integrated the web browser with QT? So we can browse into a Qt application. So you can create desktop widgets and canvases with Qt from Javascript? That way you could ship desktop software and arbitrary integrations to software.

  • TeMPOraL 6 days ago

    > Why is integrating with software so difficult? Very few people know how to do it.

    I feel it's because of inherent conflict of interests and priorities. A software product can provide services to the user, or provide services to other programs. It's rare to see one that does both, because the two goals seem often at odds.

    Say you're writing a software component for other programs to use. You probably have some specific programs in mind, some of which are end-user-facing. In this case, you may not want to spend resources on developing user-facing UI and features that make your product usable stand-alone - you'd likely end up competing with your own customers.

    Say you're writing user-facing software instead. You want to own the entire user experience. Mixing UI, user interaction and the "business problem"-solving code together lets you work faster. Also, you don't want to make it easy for anyone to integrate with the core of your software, because that would be inviting competitors to own the user experience while using your own backend, ruining all kinds of marketing shenanigans you'd rather play on your users.

    I don't like this, but I see there's a mix of both reasonable and greedy reasons why software isn't developed with integration in mind.

    The major exception here is when the platform on which the software runs encourages, insists on, or demands the software to allow for integration. Windows does that to an extent with COM / DCOM. Emacs does that by its nature. But it's only moving the problem one level up - e.g. Microsoft environment can't integrate well with Apple environment.

  • brendank310 6 days ago

    OT: You can do that with Qt. We played with implementing it ourselves for a project about 10 years ago. Since then I think there is an official QPA that will render Qt apps within the browser, and there is the Wt project. Might be worth looking at for some needs but I don't see it becoming popular.

  • JustLurking2022 5 days ago

    Honest question - by the time you're scaling with GridGain, why are you still using Excel? Even Python is probably faster by a decent margin.

andysinclair 6 days ago

Looks great, will give it a try (as a fellow Excel developer).

One small point: on your webpage the "Try QueryStorm out" button on the "Start a free trial" panel just points to: rather than the generate key page.

  • anakic 6 days ago

    Thanks, good catch!

inglor 6 days ago

I work on Excel at Microsoft and this is really cool. I’ll check it out and share it with the rest of the R&D.

  • andysinclair 6 days ago

    Do you know if this item from the Microsoft 365 roadmap would stop Add-ins (xll files) like this from working?

    I also have a vested interest as one of my software products is an xll Add-in. Any further details from Microsoft would be most welcome, thanks.

    • anakic 6 days ago

      No idea, haven't seen this until now. Hopefully they provide a mechanism for allowing legitimate addins to get around it. Perhaps using a code signing cert (which I do) or an EV certificate would be appropriate. Security has been a bit of nightmare with Excel addins. I've had to deal with false positives on and off again a bunch of times already. First it was windows smart screen, then antivirus vendors every so often. It's a slog...

      • tech234a 6 days ago

        Typically you can go into the file properties and check the “Unblock” checkbox to remove what Microsoft calls the “Mark of the Web”.

    • inglor 6 days ago

      Open us a feedback through the app. We actually read every tiny bit.

      • Tempest1981 6 days ago

        Cool. How can I turn off the animated cursor movement in Excel? And Outlook? Drives me crazy. I keep submitting feedback. Even a registry hack is fine.

  • anakic 6 days ago

    Thanks, that's great!! <3

  • airstrike 5 days ago

    May I suggest a new feature? I imagine there's no real hard reason why Data Validation won't take dynamic arrays. It would be amazing to use UNIQUE or even FILTER in the Custom format. I've tried all sorts of workarounds including defining named ranges, using INDIRECT, etc. but it seems like I inevitably need to create a range for Data Validation to work

    Which in turn leads me to think there should be a way to create a virtual Range object in VBA that isn't really in a sheet (or a VirtualRange object that is similar enough to Range to make it work for most purposes). If one were to refactor Range entirely (not suggesting that), it seems like the issue is that the Range object actually encapsulates two different data representations into one jumbled up object: (1) cells in a worksheet with properties such as style, fill, value, etc. and (2) a traversable quasi-array data type with useful methods such as offset, rows, columns, etc. Those two things often line up, but not always.

    Anyway, I probably spend too much time thinking about Excel :-) </rant>

  • gadders 6 days ago

    Jan 2024 - Microsoft releases Excel with it's own built-in C# IDE, doesn't credit original developer.

    • inglor 6 days ago

      Oh boy you don’t know what our culture looks like. It’s more “it’s cool that people are building on top of it and we want to figure out how we can make it easier”

      • iforgotpassword 6 days ago
        • inglor 6 days ago

          Oh Microsoft the company is not to be trusted and is not your friend. It’s a huge company with many employees and products. Moreover I can’t attest to any other group’s culture - I can only say what we do in Excel.

          In Excel working hard to make addons possible and trying to foster an ecosystem of users sharing expertise is a focus as well as community building and smbs.

          Taking a cool community project and doing it ourselves would shooting our selves in the foot.

          More than once I didn’t do things or work in features for that reason.

          Again not because Microsoft is your friend but because it’s in our business interest.

          I don’t speak for Microsoft or Excel and am just a developer/hacker ;)

          • mst 6 days ago

            I always got the feeling that because it's such a key product the Excel team was basically its own organisation within the wider corporation and as a result had a lot more freedom to make its own choices.

            (not that I'm arguing for trust that would, as you say, be misplaced, but if my feeling is correct then the Excel org's englightened self interest can diverge from the mothership's self interest more than other divisions can, which makes the calculations as to what your management is likely to decide notably different)

            • pjmlp 6 days ago

              Traditionally Microsoft has had three big feuds.

              Apps (where Office belongs), DevDiv (VS, .NET and such), WinDev (Windows, C, C++).

              All of them used to compete quite a lot among themselves.

              No idea how it looks like nowadays with all the business units, but I get a feeling that WinDev vs DevDiv is still a thing.

          • pyth0 6 days ago

            I got this impression as well. I worked on a team two years back building out a very complex Excel plugin using Excel.js. The SDK has quite a few quirks and we ran into some problems along the way, but the team at Microsoft responsible for it was happy to help and interested in hearing feedback and features we wanted. A positive experience :)

          • gompertz 4 days ago

            A little off topic but will Typescript support ever come to desktop Excel or is it just going to remain on the web version? Office Scripts are great but bit of a bummer I can only write them for web.

    • giancarlostoro 6 days ago

      They might be likely to offer him a job there honestly. The architect of C# was poached from Borland after all.

      • gadders 6 days ago

        I hope it does work out for the original author and he deserves it but there have been cases before where concepts have been taken from their originator and implemented by the large corporate with no cash or even credit given.

        • xbar 6 days ago

          Maybe this was a better initial comment.

          • gadders 4 days ago

            Upvotes say not.

      • addandsubtract 6 days ago

        How'd that go for the AppGet dev?

        • VWWHFSfQ 6 days ago

          I always felt that there was more to that story than what was reported. My understanding is they reached out to him to interview for a PM role to develop an official "AppGet" at Microsoft but, for whatever reason, he didn't get the job. Maybe the interviews didn't go well? Maybe there were some red flags somewhere? Who knows. But it didn't really sound to me like they acted in bad faith.

        • giancarlostoro 6 days ago

          Not familiar with this story.

          • xbar 6 days ago

            Nor was I. It's worth a search and read.

      • pjmlp 6 days ago

        No he wasn't, he left Borland after being disappointed how things were going.

        He declined several approaches from ex-Borland people working at Microsoft, before reaching that point.

        • giancarlostoro 6 days ago

          Interesting, the story I've heard from various Senior Engineers is that Microsoft poached him by offering him a ton of money. Crazy to think they all repeated a tech urban legend I guess

      • IncRnd 6 days ago

        Even today, it isn't Embrace, Extend, Employ.

    • IshKebab 6 days ago

      Honestly it's annoying that they haven't already done that. I was surprised a few years ago when I checked and it didn't exist.

mcdonje 6 days ago

Really cool. I could see MS jumping on this because of their strong association with C#.

That said, I think the ideal replacement for VB & VBA in most contexts is python. The reason is they're both high level languages with ease of learning as a selling point. Python has a massive userbase, and there is significant overlap of python and MS Office tools. Data analysts who have to deal with Excel & SQL Server are much more likely to know python than any other language outside of SQL.

It seems like python has pretty much locked up the spaces that VB was designed for.

  • kab0b 6 days ago

    I thought I remember hearing like 4 or 5 years ago that MS was planning on replacing VBA with Python Support in Office apps. But I can't find anything to back that up, so maybe I just had a really wishful dream.

    • mcdonje 6 days ago

      They might have some involvement in python libraries or tooling to interact with excel files from python apps, but the default programming support within excel is still VBA. They did add a javascript API, but getting that up and running is a job geared more for a dev than a data analyst.

      What I think they should do is not just make a python API, but replace VBA with it, and expose it to end users where VBA is currently exposed. Python should be the language of macros and user defined functions.

      • raarts 4 days ago

        I tried to find info on how to set that up a while ago, but found nothing. The Microsoft pages gave me the impression it only works for the web version. Akso I'm on MacOS - couldn't find any mention of that either.

      • kevin_thibedeau 6 days ago

        They should dust off Windows Scripting Host and use that as the nexus for Office app scripting.

nycdotnet 6 days ago

Looks awesome. One fundamental issue I always faced with Excel calculations of any kind (formulas or vba) is the lack of ability to source control cleanly (binary format plus data and code are intermingled). This weakness is the other side of the spreadsheet’s greatest strength which is low friction experimentation with data. Does this product attempt to do anything here?

  • anakic 6 days ago


    You can version control the code you write with QueryStorm, to an extent. There are basically two kinds of apps you can build with this: extension apps (where you build general excel functionality) and workbook apps (where you automate a particular workbook).

    The code for extension apps is stored in a folder on your machine, and you can version control that easily.

    The code for workbook apps is stored inside workbooks. While there's no version control functionality in QueryStorm, it does let you export code from a workbook into a folder, as well as import code from a folder into a workbook project. There are context menu commands for this in the code explorer pane. This lets you decouple the code from the workbook.

    Basically, for version controlling code in a workbook, you'd have to export the code into a folder and version control it there. Exporting into a folder will clear everything from the folder except hidden stuff like the ".git" folder so your git repository will be safe. Not a perfect solution, but it can be done.

    • unnah 6 days ago

      Have you considered implementing a project folder structure, so that the workbook and the source code could be version controlled together in git, but the IDE would import and export the source automatically from/to the workbook?

      • anakic 6 days ago

        You mean add the workbook itself into the folder as binary file to include in source control? I haven't, but it might make sense, to keep the workbook in sync with the source code.

    • cxr 6 days ago

      Since XLSX etc. use Microsoft's Open Packaging Convention (a ZIP container consisting of mostly plain text), consider adding native support for unpacking and normalizing the payloads so they can be trivially diffed by existing source control systems.

      • anakic 6 days ago

        It's something to consider, for sure. Perhaps there's an easy win to be had there.

    • whitemary 6 days ago

      Can you also import it from the folder?

      • anakic 6 days ago

        Yeah, you can import the folder back into the project and it will replace all of the existing files with the ones from the folder.

denismurphy 6 days ago

Hats off @anakic this is class! It would be a game-changer if Microsoft licensed QueryStorm built in to Excel. Let's hope the right people at Microsoft are paying attention to you.

  • anakic 6 days ago

    Thanks! Wouldn't mind that outcome one bit. It's hard to get exposure and adoption for a platform like this without some serious muscle backing it. I suspect Microsoft has its sights set on the cloud, though, but still, it would be amazing if they adopted QueryStorm.

petepete 6 days ago

Hey Anakic, I remember posting a link to ThingieQuery here many years ago (2016 maybe?). Glad to see it's gone from strength to strength!

  • anakic 6 days ago

    Yeah, ThingieQuerie it was called back then:) Thanks, I appreciate the kind words!

PeterRoschke 2 days ago

This is really cool. For context, We have a tool that compiles complex Excel files into highly optimized WebAssembly.. which is great for dealing with those 2M formula files that take 10 minutes to open. We can replace all of that automatically with an API that can be called from any programming language or even a "hollowed out" version of the Excel itself.

However, replacing the functions on the VBA front is trickier. This is no longer pure functional programming, but essentially an application / data integration pipeline that wraps the formula logic. For MSFT, VBA is a dead-end for a variety of technical and business reasons ... unfortunately the current alternatives in Excel (Typescpript Add-ins, ScriptLab, OfficeScripts and lambda) all have some shortcomings. MSFT still hasn't quite gotten it right. As a result some financials have tried moving out of Excel entirely and into things like Python... but those projects either fail outright or reach a steady state of about 10%-30% complete as it becomes clear that you can't replace SMEs with a IT development team and keep up with maintenance and business changes in thousands of files.

Anyway - we have a few clients standing in-front of a few hundred/thousand Excel "Applications" some of which could use a modern, Excel centric IDE and runtime. Would love to chat with you and see if we can help them out together. Look me up on LinkedIn.

jbb_hn 6 days ago

Wow. As someone that has written a fair amount of VBA in the past, this is a game changer.

Impressive feat of integration and I hope you're rewarded for all your efforts.

Clearly a passion project!

cm2187 6 days ago

Microsoft actually built that already, then they decided to kill it. It was called VSTA (not to be confused with VSTO). It shipped with one of the apps of Office 2007.

  • anakic 6 days ago

    At first I thought you were referring to VSTO, then I saw the "not to be confused with VSTO" part. I had no idea this ever existed. Thanks for mentioning it. I wonder why they decided to pull the plug back then.

    • cm2187 6 days ago

      I suspect it must have been part of "let's try to secure / lockdown office", "users writing codes is bad, they should only push buttons", and at the same time they tried to make it as hard as possible to use VBA (all sorts of warnings and things disabled by default, etc)

      I am also aware of a commercial product that offers a .net IDE to be embeded into your software, though I never tried it:

    • kleiba 6 days ago

      Funnily, QueryStorm uses VSTO behind the scenes: the IDE component is a VSTO addin.

813919 6 days ago

This is incredible. I work in industrial automation and I often have to manage / make edits to "point assignment charts" which are essentially Excel Workbooks with 100+ Worksheets, each containing ~10-100 rows of formatted data which define various parameters each real world "point" should have in order to communicate with RTUs / various SCADA nodes.

Sometimes the feedback involves making a minor tweak on every Worksheet. Sure you can muck around with VBA (which is a horrible language and experience), but I often just do it manually to get it over with instead (click click click... very tedious).

C# is my go-to "business logic" language as a developer, and this looks so well integrated, really excited to use it.

  • jodrellblank 6 days ago

    > "Sometimes the feedback involves making a minor tweak on every Worksheet."

    Could be a good task for PowerShell and the ImportExcel module[1].

    (PowerShell also being a .NET language and written in C#; it has convenient access to COM control of Excel if you can't import the spreadsheet and export an updated version; through $xl = New-Object -ComObject Excel.Application )


  • cm2187 5 days ago

    You should look at spreadsheetgear. Great .net library for spreadsheet manipulation, which also has its own calculation engine (though it doesn't support xlsb and pivot tables).

  • anakic 6 days ago

    Would love to know how you get on with it. If you'd care to share, please to let me know.

    • 813919 6 days ago

      Sure! I'll make a reminder to follow up a week from now on my UX. Thanks :)

  • kevin_thibedeau 6 days ago

    You have inherited a crappy database. Export it via ODBC and use more powerful tools.

    • 813919 6 days ago

      No not really, it's many projects with many documents, shared among many contractors. You use Excel Workbooks when you work in fields like this. We have it formatted to be pretty too, so we can just publish to PDF via Adobe Acrobat when it's time to send in submittals.

samstave 6 days ago


So can people upload their code snips to the appstore such that, say, a marketing data analytics person with no coding experience can pay to get 'buttons' to run queries that are relevant to their needs?

like the salaries example, for example, I used to spend a shit-ton of time educating a CFO on AWS spends in excel.

If I could have a code snip 'button' to use some AWS-CLI creds to pull results directly from AWS asa "CFO BUTTON" and set them up with an easy export to an XLS - and then let them build their own dash to their choice that would be cool.

I havent looked at Cloudability in quite a while, (know the founder) -- but giving a CFO-type an excel button... Every CFO can navigate excel. so they get an invisible tool that empowers them, and relieves stress on the Ops team...

  • anakic 6 days ago

    Yep, that's the idea.

    You create a project that defines some custom functions, ribbon commands, context menus, shortcuts etc... and then publish it to a store. Then anyone who has the QueryStorm Runtime (and the url of the store you published to) can install it through the "Extensions" dialog.

    I haven't yet set up the ability to charge for packages but I plan on offering this. I first need a community of users, so didn't focus on charging yet.

    If you'd like some help setting up something like that AWS scenario, reach me via email: antonio [at], I've done several such integrations already (Google analytics,, TSheets, Google drive).

HeckFeck 6 days ago

Very cool. Should be a part of Excel tbh. LINQ is much better suited for data munging than JavaScript.

  • qwerty456127 6 days ago

    F# is even better.

    • eitland 6 days ago

      Maybe, but I think C# has the advantage that "everyone" knows it or Java so it is trivial to get started.

      Last I checked, admittedly a couple of years ago, starting with F# wasn't absolutely trivial.

      • eckza 6 days ago

        It is, if you know where to look.

        Therein lies the problem. The language doesn't have much marketshare, and few champions.

        I just finished reading Scott Wlaschin's Domain Driven Design for Functional Programmers and it's an incredible, batteries-included guide that goes from "hello world" to "and here's how you use it in an organization" in a few hundred pages.

        I wish I had been exposed to it about a decade ago. Incredibly easy to follow and well-explained.

        • fsloth 6 days ago

          This! Other good books are ”Expert F#” by Granicz, Syme & Cisternino, ”Real world functional programming” by Petricek and ”F# for scientists” by Harrop. The last is old but still really great in succintly explaining what ’new&unfamiliar’ structures in F# are great for pragmatic software engineering.

          Why is there so little noise in F# land? I have no data, but I can guess that the language is so unproblematic that everybody is just happily coding instead of explaining how to fix something. It’s also not very good at guis so there is usually nothing visual to demonstrate.

          • eckza 6 days ago

            I think that the problem is that:

            - fsharp's big selling point is that it runs on dotnet - most FP ideologues run screaming from M$, and there are other, better (subjectively), more-active FP langs that do many of the same things, such as OCaml and Haskell - most dotnet shops are "csharp or die" and getting fsharp adoption is more or less an impossible task for cultural reasons

            I support fsharp and generally like it, but I'm not reaching for it for net-new stuff that doesn't already have a dependency on dotnet. $0.02.

            • fsloth 4 days ago

              "most FP ideologues run screaming from M$"

              This can be also a blessing that makes the F# community quite pragmatic rather than dogmatic :)

              FP makes pragmatic sense, it's not an ideological concept.

            • qwerty456127 5 days ago

              F# is a better OCaml. Haskell is too different to compare.

          • grugagag 6 days ago

            What’s the markershare though? F# is great but Microsoft made it sortof a second class citizen

            • fsloth 6 days ago

              F# is installed by default with Visual Studio, and the tooling is pretty good. I think it hardly is second class citizen? Not promoted nearly as much as C# for sure.

              AFAIK F# is on quite solid foundation, as there is the F# foundation that would keep ball rolling, so to speak, were Microsoft to renounce the language.

              I have no idea what the marketshare is though. On Tiobe ( it seems to be nearly on par wit Scala and much more popular than Haskell or Ocaml.

              • pjmlp 6 days ago

                Pretty good if only what one cares about is CLI and class libraries.

                According to JetBrains developer survey, an amazing 3%.


                • fsloth 5 days ago

                  Tooling: Not only CLI and classlibs. The debugger in Visual Studio follows calls to c/c++ dll:s over pinvoke withhout a cinch. (Same as C#). If you wrap complex entities in e.g. Protobuf then writing hybrid applications is pretty straighforward and on solid ground.

                  All of the GUI stuff is missing of course. I would not advice to implement a GUI on top of F#.

                  The main feature of F# imo is it's succint type system where one can wrap everything in a type without much bureaucratic cost, but in a way that makes program structure so much more obvious. "If it compiles it's correct" is prety much how it goes.

                  • pjmlp 5 days ago

                    Not enough to justify many .NET shops to go multi-lingual projects.

                    They already have to use C# no matter what, given the GUI and database frameworks.

                    Adding C++ or PowerShell into the mix might happen, due to the frameworks and workloads that require reaching out to them.

                    While adding F#, even if more expressive, it barely makes sense from business point of view.

                    It isn't as if a mixed C#/F# codebase brings the same value as doing Python/C++.

                    Also to note that while F# team has pivoted into trying to make F# attractive to data science, their employer is one of the reasons why CPython is now taking performance more seriously.

                    • fsloth 4 days ago

                      I would claim the business benefit of F# would come from a more succint, legible and correct codebase that saves developer time, but I have no basis for that argument except intuition I get having developed both in C# and F#. Also I know much better engineers than me to whom this would be a nill-argument ("You can write everything really fast, just don't make mistakes").

                      "It isn't as if a mixed C#/F# codebase brings the same value as doing Python/C++."

                      I think it depends on industry and domain what the value add specifically is? To me it would totally make sense to have small, succinct business logic module in F# that talks natively to a verbose chunk of C# wpf for instance.

                      "Also to note ... CPython is now taking performance more seriously."

                      Personally I would not hold Python isomorphic to F# on any architectural level, the former not having the typesystem of F#. IMO the whole point of F# is the wonderful typesystem, immutability first, combined with full .NET ecosystem.

                      On the other hand I would not try to use F# for the stuff I use Python for - so trying to take Python head on does not sound like a super good strategy.

                      I guess F# will languish in the "few percenter limbo" in the best case. But it IS a really nice language :)

                    • qwerty456127 5 days ago

                      > While adding F#, even if more expressive, it barely makes sense from business point of view.

                      F# code is much more reliable and requires much less people to write. Isn't this good for business?

                      The only problem with F# is it's not always immediately readable to those who are not familiar with it (so it's harder to find the people to hire), isn't it?

                      I just wonder how much harder it is to teach a random person (without even a rudimentary programming skill) to code F# than to teach them C#.

    • pjmlp 6 days ago

      For that you already have PowerQuery on Excel.

      As for being better, F# is better on the language level, but sadly sucks on the tooling effort for .NET frameworks, that Microsoft is willing to spend on it.

mandeepj 5 days ago

"Bandwidth Limit Exceeded

The server is temporarily unable to service your request due to the site owner reaching his/her bandwidth limit. Please try again later."

HN kiss of death. Hopefully, you'd be back soon.

  • anakic 5 days ago

    Yeah:) Of course it happens while I'm asleep. Serves me right for loading the post with so many gifs... Back online now.

chinupbuttercup 6 days ago

Would this work with Excel for the Mac as well or is primarily a Windows thing? Somehow, while good, I feel like Excel for Mac just isn't as good as Excel for Windows.

  • anakic 6 days ago

    Unfortunately, no. Excel for Mac doesn't support either of the two technologies QueryStorm uses to talk to Excel (namely VSTO and ExcelDNA).

    Might be possible to build something that would work across all plaforms using Blazor and the Monaco editor, but that would be another huge project.

    • btown 5 days ago

      I wish that someone would make a Wine-style compatibility library that would run a local websocket server that communicates with a lightweight Add-In using the new cross-platform JS APIs for Excel, and translates VSTO/COM calls into IPC messages that are processed and responded to. Then you could bring all the old VSTO tools into the modern world, running in a separate process from Excel. This is... rather daunting to even think about. Arguably Apple should sponsor the project as a way to bring the world of finance towards using Macs!

ragebol 6 days ago

No questions, just complimenting on what looks like a great, very very useful product.

  • anakic 6 days ago

    Many thanks!

gwbas1c 6 days ago

I tried clicking on the animation to make it bigger, but the larger image doesn't load.

I'm using the Brave browser.

  • layer8 6 days ago

    Same on FireFox.

    • anakic 6 days ago

      Yeah, I just checked and it fails on some gifs for me as well (but works on others for some reason). I'll leave it as is for now, best not fiddle with it while this post is trending.

drorco 6 days ago

This looks great! In my previous company, we somehow ended up building a whole ERP around Google Sheets. Google Sheets is a very powerful tool, but the JavaScript definitely felt clunky and outdated.

A solid C# foundation for building on top of excel could probably be very useful for some companies.

I do wonder though how you can nail down a target audience for this kind of tool, seems like you'd need a special kind of tinkerer and I'm not sure how many like that are out there. In my other company, which was a small company, the ones who headed it were essentially engineers that transitioned to executive positions. I doubt there are many like that out there.

keithalewis 6 days ago

Does this use behind the scenes?

  • anakic 6 days ago

    Yeah, the runtime component is an ExcelDNA addin. The IDE component is a VSTO addin. Since VSTO doesn't allow defining custom functions I switched to using ExcelDNA for the runtime.

    • andysinclair 6 days ago

      What did you use to write the installer, and how do you determine if the targeted version of Excel is 32 or 64 bit?

      I've built an Excel-DNA based Add-in ( and distribute it via an installer built using Advanced Installer. It works well, the only real pain point is the the user has to find out which version of Excel they have installed in order to choose the correct download (32 or 64 bit).

    • keithalewis 6 days ago

      Please consider acknowledging that on your website.

      • anakic 6 days ago

        I would love to but I'm a bit scared to fiddle with the post now while it's trending. I think it's mentioned in a few places on the website, but not in this blog post. I do also use a bunch of other libraries, but yeah, ExcelDNA is one of the critical ones so mentioning it would be in order.

fazzbuilder 5 days ago

I have used QueryStorm since May 2016 back then ThingieQuery.

My head exploded from the first moment I saw it considering everything that it integrates and embeds within Excel since for a long time I have resorted to automating routines with ado and vba.

Querystorm is more than just a SQL IDE built right into the book and honestly this is the best solution in this environment that every data analyst, self-service developer or business user should give it a try.

charles_f 6 days ago

Looks awesome, and my favorite thing is this:

> $379 License + 1yr support

Cheers to you for not collecting a recurring fee for a desktop app!

  • capableweb 6 days ago

    The license is for 1 year of latest versions of the application, after that you'll stop receiving updates. This is pretty common for desktop applications, compared to SaaS.

    • charles_f 6 days ago

      It's becoming less and less common, even for desktop applications - which is why I thought this warranted some congratulations

replwoacause 6 days ago

This is such an impressive feat of engineering. Excellent job. I have no doubt this will be a hit. It wouldn't surprise me if MSFT just decided to make you an offer for it.

ycuser2 6 days ago

I would have used the hell out of it 8 years ago! VBA IDE was a pain.

Great work!

rukuu001 6 days ago

I remember you back when it was just an SQL plug-in for Excel :)

Congrats on building this and sticking with it so long. It’s awesome!

charlieflowers 6 days ago

Looks great, but I ran into an issue I'm hoping you can help with. I copy/pasted the very first example from the blog and it doesn't compile. I also have been unable to find the documentation necessary to get past the problem.

It's the example that reads the files in a dir and makes an Excel table, and it fails on line 16, which reads `(excel.Selection as Range).WriteTable(files, "myNewTable");`.

The error is `Argument 2: cannot convert from 'System.Collections.Generic.IEnumerable<<anonymous type: string File, long Size>>' to 'QueryStorm.Data.ITabular' | `

I can't find docs for WriteTable() [even after finding those gitlab repos that contain QueryStorm docs].

I think anyone trying to run with this, will need access to docs on the API.

  • anakic 6 days ago

    Thanks for trying it and replying back here.

    It looks like I was using a pre-release version of QueryStorm while I was writing the blog post. I just released that version so if you restart Excel you should get an "Update available" button in the QueryStorm ribbon in Excel.

    Could you update and post back if that fixed the problem?

    Another way of "fixing" it would be to replace the following line:

       (excel.Selection as Range).WriteTable(files, "myNewTable");
    with this line:

       Write(files, "myNewTable");
    The Write method is available globally (it's not a method that belongs to a class). This is a trick specific to C# scripts (would be illegal in regular C#).

    The documentation does lack detail in some areas, which I basically cover by answering questions via email. I do need to invest time every so often to update and extend it.

    • charlieflowers 5 days ago

      The update fixed it. Thanks! Look forward to giving it a spin.

ckluis 6 days ago

I clicked on resellers & affiliates because I was curious about your terms. They are both empty.

gadders 6 days ago

Good work, but this is depressing:

"VBA is a bit (a lot) behind the times and Microsoft isn’t planning on upgrading it. Instead, they’re offering a sandboxed JavaScript environment called Office Scripts."

Microsoft - Just swap VBA for Python ffs.

  • qiqitori 6 days ago

    There's a lot of people who only know VBA (in terms of programming languages), and there's a huge amount of VBA code in production out there. Microsoft won't make itself popular by replacing VBA for some silly technical reason, especially not because the syntax is perceived to look better. It's a bit like renaming the SUM function to ADD and expecting everyone to rewrite their formulas.

actionfromafar 6 days ago

Find a way to connect this to Zapier and the Universe might open up a wormhole.

slenk 5 days ago

Aww man, you ran out of bandwidth. May I suggest putting your server behind Cloudflare to help with that? I would offer storage if you want. I have so much extra linode bandwidth

orbit7 6 days ago

Impressive, Excel would benefit having this built in

kristianp 5 days ago
  • anakic 5 days ago

    Oh man, limit happened while I was asleep. Thanks for the stopgap measure. Just got the bandwith limit removed with my hosting provider.

major505 6 days ago

Now I can use excel. I always sucked doing stuff in excell formulas. With this now I can just linq and spit the info I need.

  • viggity 6 days ago

    devs "hate" excel because you have to reference by col/row (C10 = tax rate, etc). But few devs know that you can name cells (and ranges and tables). Just to the left of the formula bar you'll see a textbox with the default name of the cell (C10). Just delete C10 and call it "tax_rate" and now you can reference "tax_rate" in all your formulas.

    • major505 4 days ago

      I did a lot of shit in excell using vb. Even spreadsheets connected to SAP using COM+ dlls.

      But still sucks having to do requests in VB.

  • TrackerFF 6 days ago

    Now sure how known this is, but Excel 365 for Business / Enterprise supports Office Scripts (under a "Automate" tab), where you can create scripts in TypeScript.

    • gompertz 4 days ago

      I just started writing Typescript in Excel. It's really surprising this hasn't taken off more. It works very well, but is only available on Excel Web (not Desktop) application.

waldrews 6 days ago

Spectacular. Stats PhD here, I've needed this for years for practical projects in different data science roles. I'd love to talk to you about adding statistics/forecasting capabilities, maybe by exposing some existing libraries with syntactic sugar.

  • anakic 5 days ago

    Would love to! There's a library called Math.NET that I wanted to look into, but never got around to it (plus, I forgot 99% of the math I learned in college so wouldn't know how to use it). Can you get in touch via email: antonio [at]

emrah 5 days ago

"Bandwidth Limit Exceeded" is a very good sign :)

  • anakic 5 days ago

    Too bad about 8h of downtime in the middle of it trending, but yeah, can't complain too much about it:)

thunkshift1 5 days ago

You have unlocked the power(utility?) of excel for sooo many people! Msft should buy this from you

ivan_burazin 5 days ago

This is just positivity insane :)

  • anakic 5 days ago

    Fala, Ivane:)

ozim 6 days ago

Don't show it to my boss, please.

It is super cool and would love to play around with it - just not at work :)

kinggencha 6 days ago

Animations embedded within text are distracting and make the reading experience worse

  • anakic 6 days ago

    I like that a gifs shows so much in very little space, but I take your point about it being distracting. Regular mp4 videos you can play/pause explicitly might be a better option for the future.

quickthrower2 5 days ago

HN’s loving DDOS has pulled this offline. Any mirrors?

  • anakic 5 days ago

    Back online now

nielsbosma 6 days ago

Love it! Big fan of developer productivity tool like Linqpad.

kungfufrog 6 days ago

Will this only work on Excel running on Windows 10/11 X64?

  • anakic 6 days ago

    It works on Excel 2013 onwards but only on Windows. Both x86 and x64 are supported. Mac isn't supported I'm afraid.

    • kungfufrog 6 days ago

      Show stopper for me, but can I just say what a fantastic product and the article introducing it kept me hooked to the end!

      • anakic 6 days ago

        I have to do my own marketing, so I'm trying to blog more often these days. Really glad to hear you enjoyed the writing!

    • throwaway90650 6 days ago

      Is there a technical blocker on macOS Excel side that prevents you from implementing it, or is it just a matter of priorities?

      • anakic 6 days ago

        A bit of both. On the Windows side I can use VSTO or ExcelDNA to integrate with Excel, but neither is available on the Mac. One alternative I'd like to try is a web-based version which would use Blazor and the Monaco editor but I'm really not sure if that would be at all doable. I don't have the time to go there at the moment, but I'd love to try at some point.

barrenko 6 days ago

This is pretty mad.

ChicagoDave 6 days ago

Linq in Excel is very interesting.

bandyaboot 5 days ago

This sounds really impressive.

cobrabyte 6 days ago

This is excellent. Great work!

major505 6 days ago

this is.... awesome.

RektBoy 6 days ago

If the user can code in C#, why they need Excel? Exporting to Excel for other non-coder employees, sure why not.

I don't understand the use-case, Excel is horrible tool for anything else than stupid, a few hundred rows data science.

  • eatsyourtacos 6 days ago

    You must not work with any kind of real world data if you think Excel is a horrible tool.

    Pulling in 1000000000 rows of data you know absolutely nothing about to throw into your ML model and have it spit out some questionable result doesn't mean you actually work with real world data.

    >a few hundred rows data science.

    People that work with a few hundred rows are called "almost every office employee ever" and not data scientists. And you are naïve as hell if don't realize how powerful excel is for every random ass thing that happens in the real world.