Side-by-side comparison

LangChain vs Haystack

A factual comparison generated from the two reviewed directory profiles. Follow the official links for current plan limits and product terms.

SignalLangChainHaystack
TaglineOpen-source frameworks and a platform for building, evaluating, deploying, and observing AI agents.An open-source Python framework for retrieval, agents, and production AI pipelines.
CategoryDeveloper toolsDeveloper tools
PricingFreemiumOpen source
PlatformsPython, TypeScript, WebPython, Linux, API
Features
  • Open-source agent frameworks with provider integrations
  • Tracing, evaluation, deployment, and monitoring through LangSmith
  • Composable retrieval and generation pipelines
  • Document stores, agents, and evaluation integrations
TagsAPI, Coding, Open sourceCoding, Open source, Research
Community0 votes · 0 saves0 votes · 0 saves

Choose LangChain when

Open-source frameworks and a platform for building, evaluating, deploying, and observing AI agents.

LangChain provides open-source frameworks for building agents and LangSmith services for tracing, evaluation, deployment, and monitoring. Its ecosystem supports multiple model providers and SDKs for several programming languages.

Read the LangChain profile

Choose Haystack when

An open-source Python framework for retrieval, agents, and production AI pipelines.

Haystack is an open-source Python framework for retrieval, agents, and production AI pipelines. Its reviewed product surface includes composable retrieval and generation pipelines and document stores, agents, and evaluation integrations. The primary documented workflow is to build source-grounded search and question-answering systems.

Read the Haystack profile