head to head · open source
haystack vs Inngest
haystack has 26,913 GitHub stars, 3,384 forks, 143 open issues and last shipped yesterday. Inngest has 6,013 stars, 386 forks, 234 open issues and last shipped yesterday. haystack leads on adoption by 348% (26,913 vs 6,013 stars). haystack is written in Python under Apache-2.0; Inngest is written in Go under a custom or non-standard licence. haystack has attracted 13% as many forks as stars, Inngest 6%. Inngest 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.
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Side by side
| haystack | Inngest | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 6.0K |
| License | Apache-2.0 | Custom / other |
| Written in | Python | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.4K | ⑂ 386 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick haystack if
- You weight community size — 27K 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 Inngest if
- You want the Inngest feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Go
- You evaluated both and Inngest fits your workflow better
About haystack
🎉🎊✨ Haystack 3.0 is out! ✨🎊🎉 Read the announcement here! 🥳 🎈 🎆 🪅 🎇 🍾 🥂 🎁 🌈 Haystack is an open source AI orchestration framework for building production ready LLM applications in Python. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Build scalable RAG systems, multimodal applications, semantic search, question answering, and autonomous agents, all in a transparent architecture that lets you experiment, customize deeply, and deploy with confidence. Table of Contents Installation Documentation Features Haystack Enterprise: Support &…
read the full haystack overview →
About Inngest
Inngest's durable functions replace queues, state management, and scheduling to enable any developer to write reliable step functions faster without touching infrastructure. 1. Write durable functions using any of our language SDKs 2. Run the Inngest Dev Server for a complete local development experience, with production parity. 3. Deploy your functions to your own infrastructure 4. Sync your application's functions with the Inngest Platform or a self hosted Inngest server. 5. Inngest invokes your functions securely via HTTPS whenever triggering events are received. An example durable function Inngest Functions…
read the full Inngest overview →
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Frequently asked questions
Is haystack or Inngest more popular?
haystack has 26,913 GitHub stars and Inngest has 6,013. haystack has the larger community by that measure.
Are haystack and Inngest free?
Both are open source. haystack is licensed under Apache-2.0, and Inngest has no licence declared in this registry. Both are free to self-host.
What is the difference between haystack and Inngest?
haystack is written in Python and Inngest in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, haystack or Inngest?
Choose haystack if you want the larger community (26,913 stars) or its Apache-2.0 licence terms. Choose Inngest if its feature set, stack or Custom / other licence fits better. Both are self-hostable.