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LangChain is the platform for agent engineering. AI teams at Clay, Rippling, Cloudflare, Workday, and more trust LangChain's products to engineer reliable agents.

LangSmith

[**LangSmith**](/langsmith/home) is a platform that helps AI teams use live production data for continuous testing and improvement. LangSmith provides: See exactly how your agent thinks and acts with detailed tracing and aggregate trend metrics. Automatically detect and resolve recurring issues in your tracing projects. Test and score agent behavior on production data or offline datasets to continuously improve performance. Iterate on prompts with version control, prompt optimization, and collaboration features. Ship your agent in one click, using scalable infrastructure built for long-running tasks. Proxy LLM calls to enforce spend limits, redact sensitive data, and centrally manage provider credentials. LangSmith meets the highest standards of data security and privacy with HIPAA, SOC 2 Type 2, and GDPR compliance. [Meet with our team](https://www.langchain.com/contact-sales) to learn more or visit our [Trust Center](https://trust.langchain.com/).

LangSmith Fleet

Create helpful AI agents without code. Start from a template, connect your accounts, and let the agent handle routine work while you stay in control.

Open source agent frameworks

Quickly build agents that can tackle any task. Customize the building blocks of your agents. Control every step of your custom agent with low-level orchestration, memory, and human-in-the-loop support. Quickly build agents that can tackle any task. Customize the building blocks of your agents. Control every step of your custom agent with low-level orchestration, memory, and human-in-the-loop support.

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Additional resources

Ask questions, share solutions, and discuss best practices. Connect with other builders and get quick help. Submit tickets and track support requests. Real-time status of LangSmith services and APIs.