Data, AI and orchestration · NLP, retrieval and knowledge extraction

Haystack

Licence or access: Open source, Apache-2.0

status license: Open source, Apache-2.0
best use: Composable retrieval and reviewed RAG pipelines
guardrail: Preserve cited passages and reject unsupported generated claims
official source: Haystack repository

Official sources

Haystack repository https://github.com/deepset-ai/haystack

Catalogued at the 2026-09-01 research baseline. Verify the licence, free-tier limits, API schema and source terms again before deployment, and record a version-pinned registry entry for whatever you select.

Source: file 09 · 5-nlp-retrieval-and-knowledge-extraction · line 68

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