About
What is LangChain?
LangChain provides a comprehensive engineering platform and open-source frameworks designed for developers to build, test, and deploy reliable AI agents. The platform, LangSmith, offers robust tools for observability, allowing users to trace agent execution and understand complex interactions. It also includes evaluation capabilities to score and improve agent performance using real-world usage data and human feedback. For deployment, LangSmith supports shipping and scaling agents in production with features like memory, conversational threads, and durable checkpointing. Additionally, LangChain offers open-source frameworks like deepagents, langchain, and langgraph for building various types of agents, from quick-start prototypes to reliable production systems with low-level control.
Best used for
Ideal for developers and data scientists who need to build, test, and deploy reliable AI agents, observe their behavior, and iteratively improve their performance. Especially valuable for teams looking to ship and scale agents in production with robust observability and evaluation tools.
Common actions
workflowsstartup tools"AI Agents"
Capabilities
Key features
- Agent observability tracing
- Agent performance evaluation
- Agent deployment infrastructure
- Fleet agent management
- Open-source frameworks
- Human-in-the-loop support
- Type-safe streaming
Target Audience
developerdata scientiststartup founderproduct manager
Integrations
Not yet documentedPricing & Plans
Freemium · Paid · Enterprise · Usage-based
FAQs
What is the difference between LangChain's open-source frameworks and the LangSmith platform?
LangChain offers open-source frameworks (like langchain, deepagents, langgraph) for building AI agents with varying levels of control. LangSmith is the engineering platform that complements these frameworks, providing tools for observing, evaluating, and deploying the agents you build, ensuring reliability and performance in production.
Does LangSmith offer a free plan for individual developers?
Yes, LangSmith provides a Developer plan that is free for solo users. It includes up to 5,000 base traces per month, tracing for debugging, online and offline evaluations, and access to one Fleet agent with up to 50 runs per month.
Can I host LangSmith on my own infrastructure?
The Enterprise plan for LangSmith offers alternative hosting options, including hybrid and self-hosted deployments. This allows organizations to keep data within their VPC and meet specific security and compliance requirements, which is not available on Developer or Plus plans.
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