LangChain
by LangChain · www.langchain.com ↗
Open-source framework for building LLM applications and agents, with LangSmith and LangGraph for observability and orchestration.
framework open-source agents llm-apps
- Category
- Agents & Automation
- Business model
- Open (open weights/source)
- Availability
- Global
- Launched
- 2022-10
- Record updated
- 2026-07-29
- License
- MIT
- Founded
- 2022
- Headquarters
- US
- Canonical URL
- https://globalaiproductindex.com/products/langchain/
Overview
LangChain is a widely used open-source framework for building applications and agents with large language models, available in Python and JavaScript. The company also offers LangSmith for observability and evaluation and LangGraph for stateful agent orchestration. The framework is free; LangSmith has paid tiers.
Key features
- Composable building blocks for LLM apps
- LangGraph for stateful agent orchestration
- LangSmith for tracing, evaluation, and monitoring
- Integrations with many models, vector stores, and tools
Use cases
- Building RAG pipelines and chatbots
- Orchestrating multi-step agents
- Debugging and evaluating LLM applications
Pricing
The framework is free and open source; LangSmith offers a free tier plus paid plans for teams.
Frequently asked questions
Is LangChain free?
Yes. The LangChain framework is open source and free; LangSmith has a free tier and paid plans.
What are LangGraph and LangSmith?
LangGraph orchestrates stateful agents, while LangSmith provides tracing, evaluation, and monitoring.
Which languages does LangChain support?
LangChain is available in Python and JavaScript/TypeScript.
Similar products
- Agentforce — Salesforce's enterprise AI agent platform for building, testing, and running autonomous agents across service, sales, and employee workflows.
- AutoGPT — Open-source framework for building and running autonomous AI agents that chain tasks toward a goal.
- CrewAI — Open-source framework for orchestrating collaborative teams of role-playing autonomous AI agents.
- goose — Open-source, extensible AI agent from Block that runs on your machine as a desktop app, CLI, and API, using any LLM and MCP extensions.
- Lindy — Platform for building no-code AI agents that automate tasks across email, meetings, and business apps.
- LlamaIndex — Open-source data framework for connecting LLMs to private data, powering retrieval-augmented generation and document agents.
All LangChain alternatives → · All Agents & Automation products →
Sources
This record was last reviewed on 2026-07-29.
Machine-readable record: /api/products/langchain.json · Spot an error? Suggest a correction