Short version: GridCraft matched Excel's saved value on 1,842 of 1,968 formulas across 15 of Microsoft's own templates, and 13 of the 15 files were perfect. It's free, while Microsoft 365 Personal costs $99.99 a year. It also has a real #SPILL! bug that a save can write into your file, and it can't display Khmer yet.

▶ Full video: https://youtu.be/18kJ7HuIvnQ

What is GridCraft?

GridCraft is Excel rebuilt from scratch in Rust by storytold, the team behind ArtCraft and WordCraft.

License: MIT or Apache-2.0

Runs on: Mac, Windows, Linux and in the browser

Features: reads and writes Excel files, with over 500 functions, PivotTables and charts

Stars: about 7,300 on GitHub, one month after launch

I tested version 0.17.0 on a Mac mini M4 with 16 GB of RAM.…