# LangSmith — AI Compare Ninja

> Trace, evaluate, deploy, and run agents with compute/storage units and a model gateway.

## Overview
- **Category:** Development & Code (Agent & RAG frameworks)
- **Status:** Active · checked - Active Developer, Plus, and Enterprise offers with trace, deployment, Fleet, Engine, and sandbox metering.
- **Paid from:** $39 / Month (Plus)
- **Free access:** Free plan (1 seat, 5,000 base traces, 5 Fleet LCU, and 5 LCU + 1 LSU sandbox/month.)
- **Website:** https://www.langchain.com/langsmith
- **Canonical URL:** https://www.aicompare.ninja/en/tool/langsmith

## What it does
- Tracing, evaluation, and deployment for LLM agents and other frameworks
- Developer plan free for one user and 5,000 traces per month
- Plus: $39/seat, 10,000 traces per organisation, deployment and Engine unlocked
- EU or US cloud or own VPC selectable
- Cloud, hybrid, or self-hosted operation

## In brief
LangSmith is the commercial observability, evaluation, and deployment platform in the LangChain ecosystem. It also works with other agent frameworks and stores runs as traces with selectable retention.

Developer is free for one user and 5,000 traces. Plus costs $39/seat, includes 10,000 traces per organisation, and unlocks deployment and Engine. At scale, trace retention and LCU/LSU costs dominate seat price.


## Limits
Developer includes 5,000 and Plus 10,000 base traces per month. Usage beyond that is metered: one LCU costs $1.50 and one LSU costs $1. Actual consumption depends on agents and resources used; no daily or per-task price is derived.

## Pricing tiers
| Tier | Price | Period | What you get |
| --- | --- | --- | --- |
| Developer | free | Month | 1 seat; 5,000 base traces/month; 14-day base retention; 5 Fleet LCU/month included; 5 LCU + 1 LSU sandbox usage and up to 10 sandboxes |
| Plus | $39 | Month | Unlimited seats at per-seat price; 10,000 base traces/month per organisation; 1 small serverless deployment included; 25 Fleet LCU/month; Engine, tuned evaluators, and deployment access |
| Trace usage | $0.0005 / $0.005 | Usage | 14-day base retention; 400-day extended retention; Extended upgrade adds $0.0045 on top of the base trace; Multiple events may belong to one trace |
| LCU / LSU usage | $1.50 / $1 | Usage | LCU for compute, Engine, Fleet, deployments, and sandboxes; LSU for database, memory, and storage; Engine about 5-30 LCU/successful run; Tuned perceived error 0.01 LCU/run |
| Enterprise | contact sales | Year | Cloud, hybrid, or self-hosted; Custom SSO, ABAC, and RBAC; Custom seats/workspaces and SLA; EU or US cloud or own VPC |

## Sources
All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.

- https://www.langchain.com/pricing
- https://docs.langchain.com/langsmith/administration-overview
- https://docs.langchain.com/langsmith/billing

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*Source: AI Compare Ninja (2026) - https://www.aicompare.ninja/en/tool/langsmith*