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Haystack

Open-source Python framework from deepset for modular pipelines and agent workflows covering retrieval, tool use and generation.

Harness by deepset

IndexedApache-2.0★ 26,826
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pip install haystack-ai

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About

Haystack is an open-source orchestration framework from deepset for building LLM-powered agents and applications from composable components. Its pipelines are serializable, cloud-agnostic and described as Kubernetes-ready, with logging, monitoring and deployment guides. It connects to providers and stores such as OpenAI, Anthropic, Mistral, Hugging Face, Weaviate, Pinecone and Elasticsearch. deepset also sells enterprise support, and the site announces Haystack 3.4.

Use cases: knowledge-base, agent-orchestration

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Fact sheet

Languages
PythonREADME
Packages
haystack-ai (pypi)README
Deploys to
kuberneteshaystack.deepset.ai
Model providers
openai, anthropic, mistral, huggingfacehaystack.deepset.ai
Maturity
Stablehaystack.deepset.ai

Facts extracted by Claude Sonnet 5.5 from the linked sources on Oct 24, 2026; reviewed Oct 24, 2026. Wrong fact? Tell us.

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Signals

Stars
26,826
Forks
3,333
Open issues
94
Weekly downloads
145,310
Last commit
Oct 24, 2026 (3 days ago)
Last release
Oct 21, 2026 (6 days ago)
Last package publish
Oct 21, 2026 (6 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Packages
pypi haystack-ai
License
Apache-2.0
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Cite this page

Haystack. Agent Mart. https://agentmart.dev/harnesses/haystack (last updated 2026-10-24)