head to head · open source
OpenTofu vs Cozystack
OpenTofu has 30,703 GitHub stars, 1,414 forks, 320 open issues and last shipped yesterday. Cozystack has 2,381 stars, 216 forks, 757 open issues and last shipped yesterday. OpenTofu leads on adoption by 1,190% (30,703 vs 2,381 stars). OpenTofu is written in Go under MPL-2.0; Cozystack is written in Go under Apache-2.0. OpenTofu has attracted 5% as many forks as stars, Cozystack 9%. Cozystack 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 | Cozystack | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 2.4K |
| License | MPL-2.0 | Apache-2.0 |
| Written in | Go | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.4K | ⑂ 216 |
| 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 Cozystack if
- You want the Cozystack feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and Cozystack 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 Cozystack
Cozystack Cozystack is a free platform and framework for building clouds. Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix. With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database as a Service, virtual machines, load balancers, HTTP caching services, and other services with ease. Use Cozystack to build your own cloud or provide a cost effective development environment. Use Cases Using Cozystack to build a public cloud You can use Cozystack as a backend for a public cloud Using…
read the full Cozystack overview →
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Frequently asked questions
Is OpenTofu or Cozystack more popular?
OpenTofu has 30,703 GitHub stars and Cozystack has 2,381. OpenTofu has the larger community by that measure.
Are OpenTofu and Cozystack free?
Both are open source. OpenTofu is licensed under MPL-2.0 and Cozystack under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenTofu and Cozystack?
OpenTofu is written in Go and Cozystack in Go. 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 Cozystack?
Choose OpenTofu if you want the larger community (30,703 stars) or its MPL-2.0 licence terms. Choose Cozystack if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.