head to head · open source
haystack vs agent-swarm
haystack has 26,559 GitHub stars, 3,153 forks, 143 open issues and last shipped yesterday. agent-swarm has 810 stars, 105 forks, 11 open issues and last shipped today. haystack leads on adoption by 3,179% (26,559 vs 810 stars). haystack is written in Python under Apache-2.0; agent-swarm is written in TypeScript under MIT. haystack has attracted 12% as many forks as stars, agent-swarm 13%. agent-swarm was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agents, framework), 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 | agent-swarm | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 810 |
| License | Apache-2.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-19 | 2026-09-20 |
| Forks | ⑂ 3.2K | ⑂ 105 |
| 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 agent-swarm if
- You want the agent-swarm feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and agent-swarm fits your workflow better
About haystack
Haystack is an open source AI orchestration framework written in Python under the Apache 2.0 licence, for building context engineered, production ready large language model applications as modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation, and it is aimed at developers and teams building scalable agents, retrieval augmented generation, multimodal applications, semantic search, question answering, and conversational systems.
read the full haystack overview →
About agent-swarm
Agent Swarm is an MIT licensed, self hosted orchestration engine that runs a lead agent delegating goals to worker agents inside isolated Docker containers, built for teams that want their company to become AI native while keeping the work on their own infrastructure.
read the full agent-swarm overview →
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Frequently asked questions
Is haystack or agent-swarm more popular?
haystack has 26,559 GitHub stars and agent-swarm has 810. haystack has the larger community by that measure.
Are haystack and agent-swarm free?
Both are open source. haystack is licensed under Apache-2.0 and agent-swarm under MIT. Neither carries a licence fee.
What is the difference between haystack and agent-swarm?
haystack is written in Python and agent-swarm in TypeScript. 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 agent-swarm?
Choose haystack if you want the larger community (26,559 stars) or its Apache-2.0 licence terms. Choose agent-swarm if its feature set, stack or MIT licence fits better. Both are self-hostable.