LangChain
LangChain is an open-source framework designed to simplify the development of applications powered by large language models (LLMs).
Free + paidWebAPICLIOpen sourceKoreanLLM-basedMultimodal
Visit websitelangchain.com
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LangChain is an open-source framework designed to simplify the development of applications powered by large language models (LLMs). It provides modular components for data retrieval, prompt management, model chaining, and memory. As of 2026, it has become the industry standard for enterprise AI, leveraging LangGraph for stateful multi-agent orchestration and LangSmith for comprehensive observability and debugging.
Key features
- LLM Chaining (LCEL)
- RAG Support
- Stateful Agents (LangGraph)
- Observability & Debugging (LangSmith)
- 1,000+ Integrations
- Memory Management
- Multimodal Support
Pricing
Free + paidStarting price: Free (open source) / $39/seat/mo (LangSmith Plus)
View pricing pageVerified on:
Use cases
- Intelligent Chatbots
- Internal Document Q&A
- Automated Data Workflows
- Multi-agent Collaboration Systems
Who it is for
AI EngineersSoftware DevelopersData scientistsEnterprise Solution Architects
Integrations
OpenAIPineconeMongoDBSlackNotion
Tags
RAG
How we verified this
Company, pricing, and feature details come from the primary sources below and our latest verification pass. When sources disagree, the official source and the most recent check win.
Last verified 08/30/2026Verified sources: 1
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