LangSmith
LangSmith is an observability platform designed to help teams build and ship reliable AI agents and LLM applications.
Our verdict
Who it's for
Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
Who should look elsewhere
Specific pricing details require visiting a separate page
Pros
- +Provides deep visibility into non-deterministic LLM behavior
- +Helps improve application performance and response quality
- +Offers comprehensive monitoring and alerting capabilities
- +Identifies systemic issues and user needs automatically
- +Flexible integration with various frameworks and OTel
Cons
- −Specific pricing details require visiting a separate page
- −Self-hosting is only available on the enterprise plan
- −Requires some setup (e.g., environment variables) to get started
Key features
- ✓Agent tracing for step-by-step debugging of LLM applications
- ✓Live dashboards for monitoring costs, latency, and response quality
- ✓Alerts for critical business metrics
- ✓Automatic discovery and clustering of similar conversations (Insights Agent)
- ✓Support for any framework, including LangChain and LangGraph
- ✓OpenTelemetry (OTel) support for unified observability
- ✓Self-hosting option for enterprise plans
- ✓No added latency to applications
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Developer | $0 | month · per seat | $0/seat official; 1 seat; 5k base traces / month then pay-as-you-go |
| Plus | $39 | month · per seat | $39/seat/month official; Unlimited seats; 10k base traces / month then pay-as-you-go |
| Enterprise | — | month | Quote; Hybrid or self-host; Custom SSO |