head to head · open source
OpenTofu vs st2
OpenTofu has 30,703 GitHub stars, 1,414 forks, 320 open issues and last shipped yesterday. st2 has 6,556 stars, 797 forks, 603 open issues and last shipped 5 days ago. OpenTofu leads on adoption by 368% (30,703 vs 6,556 stars). OpenTofu is written in Go under MPL-2.0; st2 is written in Python under Apache-2.0. OpenTofu has attracted 5% as many forks as stars, st2 12%. 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 | st2 | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 6.6K |
| License | MPL-2.0 | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 1.4K | ⑂ 797 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenTofu if
- You weight community size — 31K 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 st2 if
- You want the st2 feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and st2 fits your workflow better
About OpenTofu
Homepage Slack Get Started OpenTofu is an OSS tool for building, changing, and versioning infrastructure safely and efficiently. OpenTofu can manage existing and popular service providers as well as custom in house solutions. Getting help and contributing Have a question? Post it in GitHub Discussions Open a GitHub issue Join us in the opentofu channel on the CNCF Slack! Want to contribute? Please read the Contribution Guide. Recurring Events Community Meetings on Wednesdays at 12:30 UTC (calendar) Technical Steering Committee Meetings every other Tuesday at 4pm UTC (calendar) [!TIP] For more OpenTofu events…
read the full OpenTofu overview →
About st2
StackStorm is a platform for integration and automation across services and tools, taking actions in response to events. Learn more at www.stackstorm.com. TL;DR Install Get yourself a clean 64 bit Linux box that fits the system requirements. Run the installer script: Read the docs: Questions? Check out forum.stackstorm.com Or join our Slack community StackStorm Overview About StackStorm is a platform for integration and automation across services and tools. It ties together your existing infrastructure and application environment so you can more easily automate that environment with a particular focus on taking…
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Frequently asked questions
Is OpenTofu or st2 more popular?
OpenTofu has 30,703 GitHub stars and st2 has 6,556. OpenTofu has the larger community by that measure.
Are OpenTofu and st2 free?
Both are open source. OpenTofu is licensed under MPL-2.0 and st2 under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenTofu and st2?
OpenTofu is written in Go and st2 in Python. 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 st2?
Choose OpenTofu if you want the larger community (30,703 stars) or its MPL-2.0 licence terms. Choose st2 if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.