Prefect vs Temporal
A side-by-side comparison of two self-hosted automation & workflows options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Prefect | Temporal |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 97 · Excellent | 97 · Excellent |
| Category | Automation & Workflows | Automation & Workflows |
| License | Apache-2.0 | MIT |
| Language | Python | Go |
| Setup difficulty | Medium | Hard |
| Min. RAM | 1,024 MB | 2,048 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, helm |
| GitHub stars | ★ 23,913 | ★ 23,263 |
| First released | 2018 | 2019 |
| Replaces | AWS Step Functions, Azure Data Factory | AWS Step Functions, Azure Logic Apps |
What are Prefect and Temporal?
Prefect
Prefect is a workflow orchestration tool that turns Python functions into observable, schedulable pipelines. The open-source server can be self-hosted to coordinate and monitor flow runs.
- Pythonic flow and task definitions
- Dynamic, event-driven workflows
- Self-hostable orchestration server
- Rich observability dashboard
Temporal
Temporal is an open-source platform for building durable, reliable workflows in code. It guarantees that long-running business processes survive failures, restarts and infrastructure changes.
- Durable execution guarantees
- Workflows written in general-purpose code
- Automatic retries and state persistence
- SDKs for many languages
Prefect vs Temporal: key differences
Prefect is written in Python, while Temporal is built with Go. Licensing differs — Apache-2.0 for Prefect versus MIT for Temporal. Prefect is the lighter option, starting around 1,024 MB of RAM against 2,048 MB for Temporal.
Why pick each one
Choose Prefect if…
- Pleasant developer experience
- Flexible dynamic workflows
Watch out for
- Some features tied to Prefect Cloud
Choose Temporal if…
- Extremely reliable for long workflows
- Strong multi-language support
Watch out for
- Operationally complex to self-host
Frequently asked questions
Is Prefect or Temporal better?
Prefect is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Temporal if its specific feature set fits your needs better.
Are Prefect and Temporal free and open-source?
Yes. Prefect is licensed under Apache-2.0 and Temporal under MIT. Both can be self-hosted at no software cost.
Can I run Prefect and Temporal with Docker?
Prefect: yes. Temporal: yes.
Which is lighter on resources, Prefect or Temporal?
Prefect has the smaller minimum footprint at 1,024 MB of RAM, compared to about 2,048 MB for Temporal. Real-world usage depends on library size, user count, and enabled features.