# LangSmith (LangChain) — AI Tool Profile
> Source: https://agentrobbies.com/tools/langsmith-observability
> Ecosystem: AGENT-INFRA | Verified: 2026-10-11
> 100% Independent Listing • Zero Affiliate Links

## Description
Unified DevOps platform for debugging, testing, evaluating, and monitoring LLM applications and autonomous multi-agent systems.

## Access & Pricing
Developer free tier (5k traces/mo); Plus at $39/seat/mo.

## Key Capabilities
- Full execution graph visualization for multi-step agent chains
- Automated dataset curation from production traces
- Online evaluation and latency/cost attribution breakdown

## Alternatives & Replaces
- Custom logging middleware
- Helicone

## Robbie's Take
**Robbie's Workflow Take:** Best evaluated within a bounded workspace using version control. Configure strict tool approvals and MCP permission gates before granting terminal or file execution access. Monitor token spend carefully when running multi-turn autonomous refactoring loops.

## Direct Link
https://www.langchain.com/langsmith