Why IronCalc?
Since the days of VisiCalc -over 45 years ago- spreadsheets have been an essential application on our computers. But despite numerous proprietary and open-source options, finding a universally accessible, reliable, and high-quality engine remains a challenge today. Many existing solutions are expensive, require accounts, suffer from performance and stability issues or are not ready for the modern web.
We think there’s room for something better.
Whether you're building a SaaS platform, automating spreadsheet processing at scale, enabling real-time collaboration, or adding interactive spreadsheets to a blog or dashboard, IronCalc is designed to be simple to integrate, easy to scale, and friendly for developers and users alike.
We’re not just building another tool; we’re trying to contribute to the future of spreadsheet technology.
dg-ac
The IronCalc Team
Sponsors
IronCalc is part of the ELFA consortium (Encrypted Local-First Architecture), a project that was awarded a Horizon Europe grant from the European Commission in early 2026 under HORIZON CL4-2025-03-HUMAN-16, Area 4, with the goal of developing alternative solutions to centralised platforms.
Grant Agreement No: HORIZON-CL4-2025-03-HUMAN-16
See the consortium page
This project is funded through the NGI0 Entrust Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet program, under the aegis of DG Communications Networks, Content and Technology.
Grant Agreement No: 101092990
See the project pageContributing
IronCalc is developed openly on GitHub and welcomes contributions. See the contributing guidelines for more details.
You can also join our community in Discord and give feedback, ask questions, run ideas or just say hi. We are also present on Bluesky and Mastodon.
We thank our contributors for their help and support!