deepset-ai/haystack
Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search, and conversational systems.
Designed around a DAG-based pipeline architecture with first-class support for tool calling and function composition, Haystack integrates vendor-agnostic with OpenAI, Anthropic, Cohere, Hugging Face, AWS Bedrock, and local models. Built-in components handle retrieval, indexing, memory, and evaluation, while the extensible component interface enables custom operators and third-party integrations through Hayhooks for REST API and MCP server deployment.
24,487 stars and 671,835 monthly downloads. Used by 10 other packages. Actively maintained with 188 commits in the last 30 days. Available on PyPI.
Stars
24,487
Forks
2,650
Language
MDX
License
Apache-2.0
Category
Last pushed
Mar 12, 2026
Monthly downloads
671,835
Commits (30d)
188
Dependencies
18
Reverse dependents
10
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