head to head · open source
haystack vs Tracely-ai
haystack has 26,924 GitHub stars, 3,388 forks, 143 open issues and last shipped yesterday. Tracely-ai has 1,530 stars, 173 forks, 21 open issues and last shipped 29 days ago. haystack leads on adoption by 1,660% (26,924 vs 1,530 stars). haystack is written in Python under Apache-2.0; Tracely-ai is written in Python under MIT. haystack has attracted 13% as many forks as stars, Tracely-ai 11%. haystack was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-agents), 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
| haystack | Tracely-ai | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 1.5K |
| License | Apache-2.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-11-04 | 2026-10-07 |
| Forks | ⑂ 3.4K | ⑂ 173 |
| 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 Tracely-ai if
- You want the Tracely-ai feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and Tracely-ai 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 Tracely-ai
Tracely Production failures become regression tests. Trace native CI/CD for AI agents. Tracely grades every agent trace as it lands, clusters the failures into issues, freezes the bad runs into hermetic replayable cases, blocks the pull request that would ship them again — and tells you the moment any of it happens. production trace → failure detection → regression test → CI gate → alert Website · Docs · Product guide · Agent skill · Guided tour · 2 min demo · Design dossier Self host the whole stack in one click — API, worker, UI, Postgres, ClickHouse, Redis and MinIO: One workspace: what ran, what broke, what…
read the full Tracely-ai overview →
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Frequently asked questions
Is haystack or Tracely-ai more popular?
haystack has 26,924 GitHub stars and Tracely-ai has 1,530. haystack has the larger community by that measure.
Are haystack and Tracely-ai free?
Both are open source. haystack is licensed under Apache-2.0 and Tracely-ai under MIT. Neither carries a licence fee.
What is the difference between haystack and Tracely-ai?
haystack is written in Python and Tracely-ai in Python. 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 Tracely-ai?
Choose haystack if you want the larger community (26,924 stars) or its Apache-2.0 licence terms. Choose Tracely-ai if its feature set, stack or MIT licence fits better. Both are self-hostable.