Engineer reliable agents
Ship agents to production with LangChain's comprehensive platform for agent engineering.
LangChain products power top engineering teams, from AI startups to global enterprises
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Visibility & control
See exactly what's happening at every step of your agent. Steer your agent to accomplish critical tasks the way you intended.
Fast iteration
Rapidly move through build, test, deploy, learn, repeat with workflows across the entire agent engineering lifecycle.
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Durable performance
Ship at scale with agent infrastructure designed for long-running workloads and human oversight.
Model neutral
Swap models, tools, and databases without rewriting your app. Future-proof your stack as AI advances with no vendor lock-in.
Your agent engineering stack
LangChain helps you ship quickly with less code using a pre-built agent architecture and model integrations.
LangGraph puts you in control with low-level primitives to build custom agent workflows.
See exactly what your agent is doing
Improve agent quality with evals
Deploy with infrastructure built for agents
Build agents your way, with templates or custom control
Bring your own framework
LangSmith is framework-agnostic. Trace using the TypeScript or Python SDK to gain visibility into your agent interactions, whether you use LangChain's frameworks or not.
Your agent engineering stack
Build agents your way, with templates or custom control
LangChain helps you ship quickly with less code using a pre-built agent architecture and model integrations.
LangGraph puts you in control with low-level primitives to build custom agent workflows.
See exactly what your agent is doing
Agents create dense outputs that make debugging hard. Tracing gives you clear visibility into each step, so you can quickly identify issues and confidently explain what your agent is actually doing.
Improve agent quality with evals
LLMs are non-deterministic and output natural language, making responses hard to evaluate for accuracy and quality. Build realistic test sets from production data, score performance with evaluators and expert feedback, and iterate to get your agent from 'okay' to 'great'.
Deploy with infrastructure built for agents
Standard infrastructure can’t handle long-running agent workloads that need human collaboration. Deploy in one click with APIs that handle memory, auto-scaling, and enterprise-grade security out of the box — built for agent workflows that run for hours or days.
Copilots
Build native co-pilots into your application to unlock new end user experiences for domain-specific tasks.
Enterprise GPT
Give all employees access to information and tools in a compliant manner so they can perform their best.
Customer Support
Improve the speed and efficiency of support teams that handle customer requests.
Research
Synthesize data, summarize sources, and uncover insights faster for knowledge work.
Code generation
Accelerate software development by automating code writing, refactoring, and documentation for your team.
AI Search
Offer a concierge experience to guide users to products or information in a personalized way.
Get inspired by companies who have done it.
Teams building with LangChain products are driving operational efficiency, increasing discovery & personalization, and delivering premium products that generate revenue.
Klarna's AI assistant reduced customer query resolution time by 80%, powered by LangSmith and LangGraph.
Elastic’s AI security assistant, built with LangSmith and LangGraph, cut alert response times for 20,000+ customers.
Replit's AI Agent serves 30+ million developers. Their AI engineers rely on LangSmith to debug complex traces.
Learn alongside the 1 million+ practitioners who are pushing the industry forward
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Monthly downloads
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#1
Downloaded agent framework
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Integrations
Ready to start shipping reliable agents faster?
Get started with tools from the LangChain product suite for every step of the agent development lifecycle.