Product / UX / Orchestration & agents

Haystack

deepset's open source orchestration framework for production LLM apps in Python, built around composable modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Originally RAG/search-focused; Haystack 2.x is a general orchestrator.

Apache-2.0 core; commercial Haystack Enterprise (managed/governance) makes the overall offering open-core. ~26k stars, ~883k PyPI downloads/month (haystack-ai).

Openness

4 high confidence

4.0

license: Apache-2.0(core)
commercial: Haystack-Enterprise
source: public

Apache-2.0 self-hostable core with a commercial enterprise tier.

https://github.com/deepset-ai/haystack recorded 2026-06-17
Apache-2.0, ~25.6k stars, Haystack Enterprise tiers

Adoption

4 high confidence

4.0

~883k PyPI downloads/month for the 2.x haystack-ai package.

https://pypistats.org/packages/haystack-ai recorded 2026-06-17
~883k downloads/month

Capability

5 high confidence

5.0

Most mature combined RAG + orchestration feature set among the peers.

https://github.com/deepset-ai/haystack recorded 2026-06-17
feature set: pipelines, RAG, agents, eval

Unchanged since 2026-06-17 (last edited, not re-checked)