Oct. 8, 2026

Our talk at Local-First Conf 2026

In July, Nicolás Hatcher spoke at Local-First Conf in Berlin about collaborative spreadsheets and CRDTs. The recording is now online.

IronCalc v0.8: Dynamic Arrays, Conditional Formatting and Themes

Our biggest release yet: dynamic arrays and the spill operator, LAMBDA and LET, conditional formatting, named cell styles, full theming support, and over a hundred new functions.

IronCalc v0.7.1: Internationalization and More

A major release bringing dozens of new functions, localization support, autofill improvements, and important fixes in v0.7.0 and v0.7.1.

IronCalc will be at FOSDEM 26

We’re attending FOSDEM 26! If you see the IronCalc team around, feel free to say hi and chat about spreadsheets, Rust, or anything else.

What's New in IronCalc v0.6

A fresh release packed with arrays, implicit intersection, DATETIME support, UI upgrades, and behind-the-scenes fixes.

IronCalc at HackDays 2025

IronCalc joined 300+ innovators at HackDays 2025 in Paris to prototype La Suite Calc, a new open source spreadsheet app.

The Road to IronCalc 1.0

After months of development in the shadows and with the gracious support of nlNet, IronCalc reached a point of no return beginning this year.