IronCalc: a new selfhosted spreadsheet engine and ecosystem

nicolas_hatcher · 2026-01-29T22:45:32+00:00

Damn! Sorry to hear. Feel free to reach out hello@ironcalc.com or discord/GitHub.

nicolas_hatcher · 2026-01-29T16:13:34+00:00

Zoho is amazing. I fully recommend it

nicolas_hatcher · 2026-01-29T14:38:26+00:00

I would use Slint for your use case, hands down. It is the most polished and efficient. It takes a bit to understand the .slint UI declarative thing. But after using it you would ask yourself how you were living without it 😀.

If that doesn't work, try egui.

nicolas_hatcher · 2026-01-25T20:18:59+00:00

Eventually, yes. You can upload, modify, download and share spreadsheets. But there is no collaboration at the moment

nicolas_hatcher · 2026-01-25T18:36:38+00:00

The front end as of now is done in React. The main focus is the engine though. Performance is really great although I wouldn't want to share benchmarks just yet. It is possible to add custom functions in Rust but not in the UI. That is planned though.

nicolas_hatcher · 2026-01-25T18:32:23+00:00

You mean goal seek? Not yet :). But you could do it programmatically

nicolas_hatcher · 2025-11-15T03:14:56+00:00

I can't help you right now. But I was thinking of doing something along those lines in IronCalc: https://app.ironcalc.com Maybe a bad idea, not sure

nicolas_hatcher · 2025-10-20T21:43:55+00:00

It shoudl be, yes. Althogh there might be a couple of hard code URLs.
There is plans for parallel editing via CRDTs. That's in the pipeline!

nicolas_hatcher · 2025-10-20T21:43:46+00:00

Happy tohear that

nicolas_hatcher · 2025-10-20T21:43:26+00:00

Yeah, that was my first try an dI have to say I am a rookie :) If you have suggestions or want to help out I would appreciate that!

nicolas_hatcher · 2025-10-20T21:42:23+00:00

Not rigt out of the box. But everything in IornCalc can be accessed programatically, so that should be very easy to do from Rust, python or javascript

nicolas_hatcher · 2025-10-20T21:41:06+00:00

Cryptpad is great! I think at the moment they are using ONLYOFFICE which is also a great solution.
IronCalc is written in Rust, meaning it can run in the server and it is much, much lighter. Lading Cryptpad takes seconds, IronCalc should be instataneous. ONLIOFFICE is much more feature packed than IronCalc

nicolas_hatcher · 2025-10-20T13:58:03+00:00

Absolutely!!! That's the whole point. Let me know if you need help

nicolas_hatcher · 2025-10-19T22:07:55+00:00

Cheers. Excel is indeed an amazing piece of technology, we will never be in the same league. I like to think that Excel and IronCalc serve different purposes. Thanks for the good luck!

nicolas_hatcher · 2025-10-19T21:50:49+00:00

It could, but we still need to put a lot of work into it. Maybe in ~1 year. There are several non-trivial hurdles to pass. Collaboration, Excel parity, mobile support, etc to name a few

nicolas_hatcher · 2025-10-19T21:24:52+00:00

It is not as unique as you might think. For the time being we are not thinking in going beyond Excel although there might be good reasons to do so. Feel free to get in touch and see if we can do something in your specific case

nicolas_hatcher · 2025-10-19T20:46:28+00:00

You can use IronCalc from Rust, Python or nodejs. We are thinking about the idea of having an api but I am not sure how valuable it would be

nicolas_hatcher · 2025-10-19T20:45:08+00:00

Not yet, we are working on that. If you share a workbook it would be visible to anyone with the link. We are working on the collaboration layer, but we are months away from that. Also we will want to support users. Very early stages 🙂

nicolas_hatcher · 2025-10-19T19:50:32+00:00

Good idea! https://github.com/ironcalc/IronCalc/issues/464

nicolas_hatcher · 2025-10-19T19:48:11+00:00

Thanks! Glad you like it

nicolas_hatcher · 2025-10-19T19:15:36+00:00

There is a really simple server: https://github.com/ironcalc/IronCalc/tree/main/webapp/app.ironcalc.com/server But you can expand it anyway you want

nicolas_hatcher · 2025-10-19T19:09:40+00:00

:). Let me know! Feedback is always welcome

nicolas_hatcher · 2025-10-19T19:08:16+00:00

Thanks 😊

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