LangChain
Verified livePopular framework for building LLM apps and agents.
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LangChain at a glance
- Category
- Agent Frameworks
- Starting price
- Free
- Pricing model
- Open source
- Best for
- Developers building custom AI agents
One of 17 Agent Frameworks tools we verify live.
What is LangChain?
An open-source framework for chaining LLM calls, tools, and memory to build agents and RAG applications. Available in Python and JavaScript with a managed platform (LangSmith) for observability.
Pros
- Huge ecosystem
- Many integrations
- Python and JS
Cons
- Frequent API changes
- Can feel heavy
Top LangChain alternatives
- Agno — Fast, lightweight framework for multimodal agents.
- Claude Agent SDK — Anthropic’s SDK for building agents on Claude.
- CrewAI — Framework for orchestrating role-playing agent crews.
- DSPy — Framework for programming, not prompting, LLMs.
- Griptape — Python framework for agents, pipelines, and workflows.
- Haystack — Open-source framework for LLM search and agents.
Compare LangChain
LangChain FAQ
What is LangChain?
An open-source framework for chaining LLM calls, tools, and memory to build agents and RAG applications. Available in Python and JavaScript with a managed platform (LangSmith) for observability.
How much does LangChain cost?
LangChain is open source, so it's free to self-host. Confirm current pricing on the LangChain website.
Is LangChain free?
Yes — LangChain is open source and free to self-host.
What are the best LangChain alternatives?
Top LangChain alternatives include Agno, Claude Agent SDK, CrewAI. See the full list of agent frameworks alternatives on ToolMagpie.
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