Haystack vs LangChain
| Tagline | Open-source framework for LLM apps and search | Framework for building apps and agents on top of LLMs |
|---|---|---|
| Category | AI Agents | AI Agents |
| Pricing | Open Source | Open Source |
| Upvotes | 0 | 0 |
| Comments | 0 | 0 |
| Page views | 0 | 0 |
| Click-through to site | 0.0% | 0.0% |
| Readiness Score | 81/100 | 81/100 |
| Launched | Oct 5, 2026 | Oct 5, 2026 |
| Maker | — | — |
What is Haystack?
Haystack by deepset is a Python framework for building RAG pipelines, agents and search systems with modular components.
What is LangChain?
LangChain provides building blocks for LLM applications: model integrations, retrieval, tools and agent patterns, in Python and JavaScript.
Not sold on either? See alternatives to Haystack or alternatives to LangChain.
Verdict
These two are evenly matched on the measurable metrics above. Choose Haystack if you want open-source framework for LLM apps and search; choose LangChain if you want framework for building apps and agents on top of LLMs.
Is Haystack better than LangChain?
They perform similarly on community data; pick based on features and pricing.
Which is cheaper, Haystack or LangChain?
Haystack is Open Source; LangChain is Open Source. Check each website for current plans.