Snapshot
Continue to About ↓- What it does
- LangSmith is LangChain's commercial platform for engineering AI agents across the development lifecycle: building (with no-code Fleet or the open-source LangChain, LangGraph and Deep Agents frameworks), testing with traces and evaluations, deploying on managed infrastructure, monitoring production runs, and governing model calls and spend.
More detail
- It is sold as a seat-based subscription with pay-as-you-go usage metered in LangChain Standard Units (LSU), alongside separately licensed open-source frameworks.
- Best for
- Engineering teams building and operating LLM agents that need step-by-step tracing, evaluation datasets, managed deployment, isolated sandboxes and spend/data controls in one platform.
More detail
- Also fits enterprises needing self-hosted, hybrid or BYOC deployment with custom SSO and access controls.
- Pricing
- Seat subscription plus metered pay-as-you-go usage measured in LangChain Standard Units (LSU) at $1.00 per LSU.
More detail
- Developer tier is $0 per seat per month with up to 5k base traces included and a maximum of one seat
- Plus is $39 per seat per month with up to 10k base traces included and unlimited seats
- Main limitation
- Buyers who want only a fully managed, code-free agent product, or teams unwilling to manage usage-based costs that vary with trace volume, compute and model usage.
More detail
- Not a fit for anyone treating 'LangChain' as a single product without deciding which layer they need.
- Record
- Living and monitored
- Reviewed
- Evidence
- Public web research
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- Structured profile ↗
About
- LangSmith is LangChain's commercial platform for engineering AI agents across the development lifecycle: building (with no-code Fleet or the open-source LangChain, LangGraph and Deep Agents frameworks), testing with traces and evaluations, deploying on managed infrastructure, monitoring production runs, and governing model calls and spend.
- It is sold as a seat-based subscription with pay-as-you-go usage metered in LangChain Standard Units (LSU), alongside separately licensed open-source frameworks.
What it helps with
- Agent runs are hard to debug in production; LangSmith provides step-by-step tracing and fast trace queries.
- Teams lack confidence in agent behavior before shipping; traces can be turned into datasets and evaluated at each step.
- Long-running agents need durable infrastructure with persistent state and secure execution.
- Model spend and sensitive data can go uncontrolled; LLM Gateway sets cost limits, detects sensitive data and requires hu
- Agent quality regresses silently; online evaluations, dashboards and alerts catch issues before users do.
- Agent-generated code can be unsafe to run; isolated sandboxes execute it with per-second metered compute.
Capabilities
A practical view of what is available and where limitations apply.
| Offering | Available | Detail |
|---|---|---|
| Observability and evaluation | Yes | Tracing, monitoring, insights, online and offline evals, dataset collection, annotation queue, prompt hub and playground, bulk data export. |
| Agent deployment | Yes | LangSmith Studio, 1-click deploy, horizontally scalable dedicated deployments, scale-to-zero when idle, 30+ API endpoints including state and memory, cron scheduling. |
| Isolated code sandboxes | Yes | Run agent-generated code safely; Developer and Plus include 8 LSU of sandbox usage per month, with Plus limited to 10 sandboxes. |
| LLM Gateway controls | Yes | Controls model calls, spend and sensitive data, with human approval for sensitive agent actions; model usage billed through Gateway Credits. |
| Agent Improvement Engine | Yes | Detects production issues automatically, finds root causes and feeds fixes back into the evaluation loop; metered in LSUs and not available on the Developer tier. |
| No-code Fleet agents | Yes | Natural-language agent building for whole-company use; included on Plus but not listed for the Developer tier. |
| MCP server exposure | Yes | Agents can be exposed as an MCP server through LangSmith Deployment, with real-time streaming of intermediate steps. |
| Self-hosted or BYOC deployment | Limited | Listed under the Enterprise tier only; exact terms and pricing require contact with sales. |
| Open-source frameworks included | No | LangChain, LangGraph and Deep Agents are separate open-source products; LangSmith is a separate commercial platform. |
| Regional data residency options | Unknown | Not stated on the supplied pages. |
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- Last reviewed
- Primary source
- langchain.com
Technical profile details
Record ID
a3b33844-002c-40c7-bc9e-1e71d982813eCanonical URLhttps://profiles.scribble.network/listing/langsmith-a3b33844