LangSmith Testing
by LangChain · freemium · Last verified 2026-03-17
LangSmith Testing is LangChain's platform for evaluating, debugging, and monitoring LLM applications with dataset-driven test suites and automated evaluators. It provides a rich UI for comparing runs across model versions, tracking regressions, and building human-in-the-loop evaluation workflows.
https://smith.langchain.com ↗B
B—Above Average
Adoption: B+Quality: AFreshness: ACitations: B+Engagement: F
Specifications
- License
- Proprietary
- Pricing
- freemium
- Capabilities
- dataset management, automated evaluation, run tracing, A/B comparison, human feedback collection, CI integration
- Integrations
- LangChain, LangGraph, OpenAI, Anthropic, GitHub Actions
- Use Cases
- LLM regression testing, prompt version comparison, production monitoring, human evaluation pipelines
- API Available
- Yes
- SDK Languages
- python, javascript
- Deployment
- cloud, self-hosted
- Rate Limits
- Free tier: 5k traces/month; paid plans scale up
- Data Privacy
- SOC 2 compliant; enterprise VPC deployment available
- Tags
- testing, llm, evaluation, tracing, langchain, observability
- Added
- 2026-03-17
- Completeness
- 100%
Index Score
66.2Adoption
78
Quality
85
Freshness
88
Citations
72
Engagement
0