head to head · open source
Inngest vs Slickflow
Inngest has 5,853 GitHub stars, 358 forks, 234 open issues and last shipped yesterday. Slickflow has 920 stars, 264 forks, 11 open issues and last shipped 3 months ago. Inngest leads on adoption by 536% (5,853 vs 920 stars). Inngest is written in Go under a custom or non-standard licence; Slickflow is written in C# under MIT. Inngest has attracted 6% as many forks as stars, Slickflow 29%. Inngest was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (workflow-engine), 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
| Inngest | Slickflow | |
|---|---|---|
| GitHub stars | ★ 5.9K | ★ 920 |
| License | Custom / other | MIT |
| Written in | Go | C# |
| Last push | 2026-09-19 | 2026-06-24 |
| Forks | ⑂ 358 | ⑂ 264 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Inngest if
- You weight community size — 5.9K stars and counting
- You want the Custom / other license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick Slickflow if
- You want the Slickflow feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and Slickflow fits your workflow better
About Inngest
Inngest is an open source workflow orchestration platform that lets developers write durable, event driven step functions in their existing language SDKs and run them on serverless, long running servers, or the edge.
read the full Inngest overview →
About Slickflow
Slickflow is an MIT licensed, .NET 8 open source workflow engine that treats large language model nodes, business rules, and multi agent orchestration as first class steps inside BPMN process diagrams, aimed at .NET developers and teams building AI driven business process automation.
read the full Slickflow overview →
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Frequently asked questions
Is Inngest or Slickflow more popular?
Inngest has 5,853 GitHub stars and Slickflow has 920. Inngest has the larger community by that measure.
Are Inngest and Slickflow free?
Both are open source. Inngest has no licence declared in this registry, and Slickflow is licensed under MIT. Both are free to self-host.
What is the difference between Inngest and Slickflow?
Inngest is written in Go and Slickflow in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Inngest or Slickflow?
Choose Inngest if you want the larger community (5,853 stars) or its Custom / other licence terms. Choose Slickflow if its feature set, stack or MIT licence fits better. Both are self-hostable.