head to head · open source
Prefect vs happier
Prefect has 24,109 GitHub stars, 2,624 forks, 858 open issues and last shipped yesterday. happier has 2,117 stars, 211 forks, 160 open issues and last shipped yesterday. Prefect leads on adoption by 1,039% (24,109 vs 2,117 stars). Prefect is written in Python under Apache-2.0; happier is written in TypeScript under MIT. Prefect has attracted 11% as many forks as stars, happier 10%. happier 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.
← all 20902 open source comparisons
Side by side
| Prefect | happier | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 2.1K |
| License | Apache-2.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 2.6K | ⑂ 211 |
| 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 happier if
- You want the happier feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and happier 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 happier
One control room for all your coding agents. The way orchestrating agents should feel. From your phone, desktop and browser. Claude Code, Codex, OpenCode, Pi and more, working together and in parallel on your own machines. Sessions can spawn subagents across agents: e.g. Claude asking Codex for a review, or Codex delegating to Claude subagents. Switch agents mid session. Approve, steer, review and commit from wherever you are. Open source · Self hostable · End to end encrypted Get started · Downloads · Docs · Self host · Discord Latest Happier project update Happier is free and open source. Your agents keep…
read the full happier overview →
More in Infrastructure & Operations
Related comparisons
More Orchestration & Scheduling projects
Compare either of these against the rest of the Orchestration & Scheduling field.
Frequently asked questions
Is Prefect or happier more popular?
Prefect has 24,109 GitHub stars and happier has 2,117. Prefect has the larger community by that measure.
Are Prefect and happier free?
Both are open source. Prefect is licensed under Apache-2.0 and happier under MIT. Neither carries a licence fee.
What is the difference between Prefect and happier?
Prefect is written in Python and happier in TypeScript. 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 happier?
Choose Prefect if you want the larger community (24,109 stars) or its Apache-2.0 licence terms. Choose happier if its feature set, stack or MIT licence fits better. Both are self-hostable.