head to head · open source
OpenTofu vs wasm3
OpenTofu has 30,209 GitHub stars, 1,368 forks, 320 open issues and last shipped yesterday. wasm3 has 8,028 stars, 538 forks, 18 open issues and last shipped yesterday. OpenTofu leads on adoption by 276% (30,209 vs 8,028 stars). OpenTofu is written in Go under MPL-2.0; wasm3 is written in C under MIT. OpenTofu has attracted 5% as many forks as stars, wasm3 7%. OpenTofu was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| OpenTofu | wasm3 | |
|---|---|---|
| GitHub stars | ★ 30K | ★ 8.0K |
| License | MPL-2.0 | MIT |
| Written in | Go | C |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 1.4K | ⑂ 538 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenTofu if
- You weight community size — 30K stars and counting
- You want the MPL-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick wasm3 if
- You want the wasm3 feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C
- You evaluated both and wasm3 fits your workflow better
About OpenTofu
OpenTofu is an open source infrastructure as code (IaC) tool that enables users to define and manage cloud and on premises infrastructure using declarative configuration files. It lives in the cloud infrastructure management ecosystem and serves as a community driven fork of Terraform, maintaining compatibility with Terraform’s configuration language and provider ecosystem while operating under the MPL 2.0 license.
read the full OpenTofu overview →
About wasm3
Wasm3 is a fast, MIT licensed WebAssembly interpreter written in C that runs across x86, ARM, RISC V, MIPS, Xtensa and other architectures — from ESP8266 microcontrollers and OpenWrt routers to browsers and Linux servers — and it is aimed at developers and embedded engineers who need to execute portable Wasm or WASI code where a full size runtime will not fit.
read the full wasm3 overview →
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Frequently asked questions
Is OpenTofu or wasm3 more popular?
OpenTofu has 30,209 GitHub stars and wasm3 has 8,028. OpenTofu has the larger community by that measure.
Are OpenTofu and wasm3 free?
Both are open source. OpenTofu is licensed under MPL-2.0 and wasm3 under MIT. Neither carries a licence fee.
What is the difference between OpenTofu and wasm3?
OpenTofu is written in Go and wasm3 in C. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenTofu or wasm3?
Choose OpenTofu if you want the larger community (30,209 stars) or its MPL-2.0 licence terms. Choose wasm3 if its feature set, stack or MIT licence fits better. Both are self-hostable.