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Set up LangSmith

Set up LangSmith for observability, evaluation, and prompt engineering. LangSmith offers two hosting models: fully managed Cloud, or Self-hosted (Enterprise) for full control.If you also want to deploy agents in production, LangSmith Deployment works with either hosting model.

Cloud

Fully managed observability, evaluation, and prompt engineering.

Self-hosted

(Enterprise) Full control with observability, evaluation, and prompt engineering in your infrastructure.
Self-hosted is available on the Enterprise plan. Get a demo to learn more.

Compare Cloud and Self-hosted

Both hosting models support LangSmith Deployment for agent workloads. Refer to the LangSmith Deployment overview to pick a topology (Cloud managed, Hybrid, self-hosted with control plane, or standalone).

Common setups

  • Fastest to start, managed everything. LangSmith Cloud paired with LangSmith Deployment on Cloud. LangChain hosts the platform, and, when you use LangSmith Deployment, also hosts your Agent Servers.
  • Observability data must stay in your infrastructure. Self-hosted LangSmith, paired with any LangSmith Deployment topology, including self-hosted LangSmith Deployment for agent workloads.
  • Managed observability, agents in your VPC. LangSmith Cloud paired with Hybrid LangSmith Deployment. Traces and evaluations stay on SaaS while agent workloads stay in your infrastructure.
  • Observability only, no agent hosting. LangSmith Cloud or self-hosted, without LangSmith Deployment. Run your agents wherever you already run apps and send traces to LangSmith.

Related

Account setup

Create an account, manage API keys, and choose a pricing tier.

Plans and pricing

Compare LangSmith plans and tiers.

Observability

Trace and monitor your LLM applications.