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Grant
Theme fund: NGI0 Commons Fund
Start: 2026-03
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IronCalc

Fast spreadsheet engine in Rust

IronCalc is a versatile open-source spreadsheet engine written in Rust from the ground up, employing modern programming best practices. IronCalc aims to be an all-purpose alternative to Excel or Google Sheets, filling an important gap in the democratisation of spreadsheets. Suited for companies, individuals, and schools alike, the project aims to be feature-rich, international, fast, and lightweight.

As IronCalc is quickly gaining adoption as a spreadsheet engine, this project will push the engine to a next level providing a solid foundation with tests, better documentation, common spreadsheet features such as search, global navigation, more cell styles and most notably conditional formatting. It will also give us the opportunity to add templates and document the widgets in the storybook.

Run by IronCalc

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This project was funded through the NGI0 Commons Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101135429. Additional funding is made available by the Swiss State Secretariat for Education, Research and Innovation (SERI).