Inngest vs Prefect
A side-by-side comparison of two self-hosted automation & workflows options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Inngest | Prefect |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 90 · Excellent | 97 · Excellent |
| Category | Automation & Workflows | Automation & Workflows |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 1,024 MB |
| Deployment | docker, binary | docker, kubernetes, helm |
| GitHub stars | ★ 5,879 | ★ 23,913 |
| First released | 2021 | 2018 |
| Replaces | Zapier, AWS Step Functions | AWS Step Functions, Azure Data Factory |
What are Inngest and Prefect?
Inngest
Inngest is an open-source platform for building event-driven workflows and reliable background jobs. It provides durable step functions, automatic retries and a local development server, and the execution engine can be self-hosted.
- Event-driven background jobs
- Durable step functions
- Local development server
- Self-hostable execution engine
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
Inngest vs Prefect: key differences
Inngest is written in Go, while Prefect is built with Python. Inngest is the lighter option, starting around 512 MB of RAM against 1,024 MB for Prefect. Prefect is the more established project (first released 2018), while Inngest arrived in 2021. Prefect has the considerably larger community, at 23,913 GitHub stars versus 5,879.
Why pick each one
Choose Inngest if…
- Good developer experience
- Reliable step execution
Watch out for
- Some features tied to Inngest Cloud
Choose Prefect if…
- Pleasant developer experience
- Flexible dynamic workflows
Watch out for
- Some features tied to Prefect Cloud
Frequently asked questions
Is Inngest or Prefect better?
Neither is universally better. Prefect has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Inngest and Prefect free and open-source?
Yes. Inngest is licensed under Apache-2.0 and Prefect under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Inngest and Prefect with Docker?
Inngest: yes. Prefect: yes.
Which is lighter on resources, Inngest or Prefect?
Inngest has the smaller minimum footprint at 512 MB of RAM, compared to about 1,024 MB for Prefect. Real-world usage depends on library size, user count, and enabled features.