head to head · open source
Prefect vs osmedeus
Prefect has 24,109 GitHub stars, 2,624 forks, 858 open issues and last shipped yesterday. osmedeus has 6,638 stars, 1,035 forks, 3 open issues and last shipped 1 months ago. Prefect leads on adoption by 263% (24,109 vs 6,638 stars). Prefect is written in Python under Apache-2.0; osmedeus is written in Go under MIT. Prefect has attracted 11% as many forks as stars, osmedeus 16%. Prefect 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
| Prefect | osmedeus | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 6.6K |
| License | Apache-2.0 | MIT |
| Written in | Python | Go |
| Last push | 2026-11-02 | 2026-10-04 |
| Forks | ⑂ 2.6K | ⑂ 1.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Prefect if
- You weight community size — 24K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick osmedeus if
- You want the osmedeus feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and osmedeus fits your workflow better
About Prefect
Installation · Quickstart · Build workflows · Deploy workflows · Prefect Cloud Prefect Prefect is a workflow orchestration framework for building data pipelines in Python. It's the simplest way to elevate a script into a production workflow. With Prefect, you can build resilient, dynamic data pipelines that react to the world around them and recover from unexpected changes. With just a few lines of code, data teams can confidently automate any data process with features such as scheduling, caching, retries, and event based automations. Workflow activity is tracked and can be monitored with a self hosted Prefect…
read the full Prefect overview →
About osmedeus
Osmedeus Osmedeus A Modern Orchestration Engine for Security What is Osmedeus? Osmedeus is a security focused declarative orchestration engine that simplifies complex workflow automation into auditable YAML definitions, complete with encrypted data handling, secure credential management, and sandboxed execution. Built for both beginners and experts, it delivers powerful, composable automation without sacrificing the integrity and safety of your infrastructure. Key Features Declarative YAML Workflows Define pipelines with hooks, decision routing, module exclusion, and conditional branching across multiple runners…
read the full osmedeus overview →
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Frequently asked questions
Is Prefect or osmedeus more popular?
Prefect has 24,109 GitHub stars and osmedeus has 6,638. Prefect has the larger community by that measure.
Are Prefect and osmedeus free?
Both are open source. Prefect is licensed under Apache-2.0 and osmedeus under MIT. Neither carries a licence fee.
What is the difference between Prefect and osmedeus?
Prefect is written in Python and osmedeus 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, Prefect or osmedeus?
Choose Prefect if you want the larger community (24,109 stars) or its Apache-2.0 licence terms. Choose osmedeus if its feature set, stack or MIT licence fits better. Both are self-hostable.