Top Open Source Spreadsheets Tools in 2026
A curated collection of the 1 best free and open-source Spreadsheets tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
IronCalc
IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
Stars4,124Last commit10d agoLicenseApache-2.0
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