head to head · open source
Prefect vs Trigger
Prefect has 24,109 GitHub stars, 2,624 forks, 858 open issues and last shipped yesterday. Trigger has 16,699 stars, 1,523 forks, 342 open issues and last shipped 3 days ago. Prefect leads on adoption by 44% (24,109 vs 16,699 stars). Prefect is written in Python under Apache-2.0; Trigger is written in TypeScript under Apache-2.0. Prefect has attracted 11% as many forks as stars, Trigger 9%. Prefect was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (automation, orchestration), so they are genuine substitutes rather than adjacent tools.
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 | Trigger | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 17K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 2.6K | ⑂ 1.5K |
| 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 Trigger if
- You want the Trigger feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and Trigger 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 Trigger
Build and deploy fully‑managed AI agents and workflows Website Docs Issues Example projects Feature requests Public roadmap Self hosting About Trigger.dev Trigger.dev is the open source platform for building AI workflows in TypeScript. Long running tasks with retries, queues, observability, and elastic scaling. The platform designed for building AI agents Build AI agents using all the frameworks, services and LLMs you're used to, deploy them to Trigger.dev and get durable, long running tasks with retries, queues, observability, and elastic scaling out of the box. Long running without timeouts : Execute your…
read the full Trigger overview →
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Frequently asked questions
Is Prefect or Trigger more popular?
Prefect has 24,109 GitHub stars and Trigger has 16,699. Prefect has the larger community by that measure.
Are Prefect and Trigger free?
Both are open source. Prefect is licensed under Apache-2.0 and Trigger under Apache-2.0. Neither carries a licence fee.
What is the difference between Prefect and Trigger?
Prefect is written in Python and Trigger 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 Trigger?
Choose Prefect if you want the larger community (24,109 stars) or its Apache-2.0 licence terms. Choose Trigger if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.