Haystack
Open-source LLM framework for building NLP pipelines
Data & ETLFree (open-source)★ 18,000Works with OpenClaw
About Haystack
Haystack by deepset is a comprehensive NLP framework for building production-ready RAG pipelines, question answering systems, and search applications. It provides a clean pipeline abstraction and supports multiple LLM backends.
Features
Pipeline builder
RAG
Document processing
Model serving
REST API
The tally
FOR
- +Production-grade RAG pipelines
- +Clean pipeline abstraction
- +Strong documentation
- +Multiple backend support
- +Enterprise ready
AGAINST
- −Steeper learning curve than LlamaIndex
- −Less community content
- −Breaking changes between versions
- −Heavy framework
Related concepts
Kept nearby
Unstructured
ETL for unstructured data — PDFs, images, HTML to LLM-ready
Free (open-source) + API · ★ 9,000
LlamaIndex
Data framework for connecting LLMs to external data
Free (open-source) + Cloud · ★ 38,000
Firecrawl
Turn websites into LLM-ready markdown or structured data
Free (open-source) + Cloud · ★ 20,000
Crawl4AI
Open-source LLM-friendly web crawler and scraper
Free (open-source) · ★ 50,000