Haystack
Runtime & OrchestrationOpen source · Apache-2.0★ 26,646（2026-10-04）Self-hosted
deepset's production LLM framework; v3 adds agent loops and tool execution.
Haystack is deepset's Apache-2.0 LLM framework first released in 2020; version 3.0 moved agent orchestration (tool-execution loop, state and streaming) into the core haystack-ai package and removed ToolInvoker, while enterprise security features stay in deepset's commercial platform.
Key facts
| Category | Runtime & Orchestration |
|---|---|
| License | Apache-2.0 |
| Language | Python |
| Self-hosted | Yes |
| GitHub stars | 26,646 (2026-10-04) |
| Last push | 2026-10-02 |
| Last verified | 2026-10-04 |
| Repository | https://github.com/deepset-ai/haystack |
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