# Haystack

> Production NLP pipelines from deepset

**Category:** AI Agents  
**Pricing:** open-source  
**URL:** https://haystack.deepset.ai  
**GitHub:** https://github.com/deepset-ai/haystack  
**Added:** 2026-08-18

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## The Hook

Haystack was doing RAG before RAG was cool, and it shows.

## What's Good

The pipeline abstraction is elegant: components connect through well-defined interfaces. Haystack 2.0 rewrite made composition more intuitive without sacrificing power. The evaluation framework is a standout.

## The Catch

Haystack strength is also its constraint. The framework assumes pipeline-based architectures; more exotic agent patterns require workarounds.

## Verdict

The mature choice for document-centric AI applications.