IronCalc
IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
Technical Profile & Specs
verified 2026-11-07
- Cost
- $0 / forever (Open Source)
- License
- Open Source
- Hosting Model
- Self-host (your server)
- Platforms
- webself-hosteddocker to self-host
- Installation
- Clone https://github.com/ironcalc/ironcalc or deploy with Docker Compose
- Operational Setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- Where Your Data Lives
- All application data and configuration live on your own server or local database.
- The Catch / Trade-off
- Requires self-hosting setup, updates, and server maintenance compared to managed Microsoft Excel.
Replaces 1 paid app
up to $15/mo ($180/yr) in subscriptions
IronCalc FAQ
Common questions
Is IronCalc free and open source?+
IronCalc is an open-source tool licensed under Open Source that runs on self-host. IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
What paid software does IronCalc replace?+
IronCalc serves as a free replacement for 1 paid SaaS application: Microsoft Excel, saving up to $15/month ($180/year) in subscription bills.
How do you install and set up IronCalc?+
Installation: Clone https://github.com/ironcalc/ironcalc or deploy with Docker Compose. Setup notes: Deploy via Docker or binary release from GitHub and configure environment variables.
What is the catch or trade-off with IronCalc?+
Requires self-hosting setup, updates, and server maintenance compared to managed Microsoft Excel.