head to head · open source
ONLYOFFICE Docs vs IronCalc
ONLYOFFICE Docs has 6,910 GitHub stars, 1,308 forks, 1,135 open issues and last shipped 2 months ago. IronCalc has 4,163 stars, 183 forks, 256 open issues and last shipped yesterday. ONLYOFFICE Docs leads on adoption by 66% (6,910 vs 4,163 stars). ONLYOFFICE Docs is written in Shell under AGPL-3.0; IronCalc is written in Rust under Apache-2.0. ONLYOFFICE Docs has attracted 19% as many forks as stars, IronCalc 4%. IronCalc was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| ONLYOFFICE Docs | IronCalc | |
|---|---|---|
| GitHub stars | ★ 6.9K | ★ 4.2K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Shell | Rust |
| Last push | 2026-07-22 | 2026-09-17 |
| Forks | ⑂ 1.3K | ⑂ 183 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ONLYOFFICE Docs if
- You weight community size — 6.9K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Shell
- You value the larger contributor base for long-term maintenance
pick IronCalc if
- You want the IronCalc feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and IronCalc fits your workflow better
About ONLYOFFICE Docs
ONLYOFFICE Docs is a free collaborative online office suite of viewers and editors for text documents, spreadsheets, presentations, forms, PDFs and diagrams, intended for teams and organisations that need real time document collaboration either inside their own infrastructure or embedded in a third party file sharing platform.
read the full ONLYOFFICE Docs overview →
About IronCalc
IronCalc is a spreadsheet engine and set of tools. It is the main engine of the IronCalc ecosystem, and it lives in the Rust open source spreadsheet ecosystem. The project provides a work in progress engine, an xlsx reader, and an xlsx writer. It is designed to be embedded, self hosted, or run in the browser.
read the full IronCalc overview →
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Frequently asked questions
Is ONLYOFFICE Docs or IronCalc more popular?
ONLYOFFICE Docs has 6,910 GitHub stars and IronCalc has 4,163. ONLYOFFICE Docs has the larger community by that measure.
Are ONLYOFFICE Docs and IronCalc free?
Both are open source. ONLYOFFICE Docs is licensed under AGPL-3.0 and IronCalc under Apache-2.0. Neither carries a licence fee.
What is the difference between ONLYOFFICE Docs and IronCalc ?
ONLYOFFICE Docs is written in Shell and IronCalc in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ONLYOFFICE Docs or IronCalc ?
Choose ONLYOFFICE Docs if you want the larger community (6,910 stars) or its AGPL-3.0 licence terms. Choose IronCalc if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.