About LangChain

LangChain is an open agent platform that enables organizations to own their intelligence by providing tooling to build, test, deploy, and monitor agents. It supports multiple models and frameworks, and emphasizes governance, observability, and a scalable deployment model for enterprise use.

LangChain offers a suite of components to manage the agent development lifecycle, including tools for building with model providers, testing behavior, deploying on secure runtimes, and monitoring production performance. It highlights an extensible ecosystem with open source frameworks and interoperability with existing tools and standards.

LangChain provides orchestration and infrastructure for agents, with capabilities to trace, evaluate, and improve agent behavior. The platform supports non-code builds through Fleet, and enables enterprise controls such as data residency options, SSO, RBAC, and BYOC/self-hosted deployments. It emphasizes a broad community and adoption in AI teams.

LangChain presents a roadmap of products and deployments that include LangSmith for observability and evals, Fleet for no-code agent creation, and Engine for debugging and fixes. It also notes deployment options in SaaS, BYOC, or self-hosted environments, and mentions platforms and integrations across its ecosystem.

Use cases

Agent development lifecycle for teams building AI-powered workflows.

Key features

Build agents fast with or without code. Choose your model. Own your harness.
Test and validate behavior before you ship with traces, evals, and datasets.
Ship agents on infra built for long-running tasks, persistent state, and secure execution.
Observe agent behavior with dashboards, traces, and online evals.
Govern cost, data, and approvals with enterprise controls and BYOC options.

Pros and cons

Pros

Open framework with multiple model providers and frameworks.

Observability and evaluation centered on production traces.

Pricing

Developer

$0 / seat per month

1 seat
Up to 5k base traces / mo, then pay-as-you-go
Start for free
Community support

Plus

$39 / seat per month

Unlimited seats
Up to 10k base traces / mo, then pay-as-you-go
Access to Deployment, Engine, and more

Enterprise

Custom pricing

Self-hosted and hybrid deployment options
Custom SSO, ABAC, and RBAC
Support SLA

Reviews

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Frequently asked questions

What is LangSmith Fleet?

Fleet brings agent capabilities to non-technical teams. Just describe what you need—daily briefings, competitor tracking, project updates. Then, LangSmith Fleet builds the agent, learns from your feedback, and asks permission before taking sensitive actions.

Is data used to train models when using LangSmith?

LangSmith does not use your data to train models. Your traces, prompts, and outputs remain private to your organization.

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