LangSmith
What it is
LangSmith is LangChain's hosted platform for tracing, evaluating and monitoring LLM apps. It works closely with LangGraph and was used alongside it in the Minimal support build.
Best for
#2 of 3Evals for Build a customer-support agent
Total 7.1 / 10
- Tracing depth & debugging (25%)8 / 10Used in Minimal's production build.
- Eval features (25%)8 / 10
Evidence:0044 (source: LangChain)
- Integration effort (20%)7 / 10Tightest with LangGraph.
Evidence:0044 (source: LangChain)
- Cost / free tier (15%)7 / 10Free 5k traces; Plus $39/seat.
Evidence:0043 (source: LangChain)
- Openness / self-host (15%)4 / 10Managed SaaS; self-host enterprise only (not verified).
Evidence:0043 (source: LangChain)
#2 of 3Evals for Build a deep-research agent
Total 7.1 / 10
- Tracing depth & debugging (25%)8 / 10Open Deep Research runs in LangGraph Studio on smith.langchain.com.
Evidence:0044 (source: LangChain)0109 (source: LangChain (GitHub))
- Eval features (30%)8 / 10
Evidence:0044 (source: LangChain)
- Integration effort (15%)7 / 10Tightest with LangGraph.
Evidence:0044 (source: LangChain)
- Cost / free tier (15%)7 / 10Free 5k traces; Plus $39/seat.
Evidence:0043 (source: LangChain)
- Openness / self-host (15%)4 / 10Managed SaaS; self-host enterprise only (not verified).
Evidence:0043 (source: LangChain)
Strengths
- Datasets, evaluators and experiments for agents.0044 (source: LangChain)
- Used with LangGraph in a production support system (Minimal).0001 (source: LangChain)
- Free Developer tier (5k base traces/month).0043 (source: LangChain)
Limits
- Per-seat pricing ($39/seat/month on Plus).0043 (source: LangChain)
Pricing
Freemium
Developer $0/seat (5k base traces/month); Plus $39/seat/month (10k traces).0043 (source: LangChain)
As of . Check the vendor's page before buying.
License
Proprietary platform · maintains open-source projects: LangSmith Python SDK (MIT), LangSmith JS SDK (MIT).0164 (source: LangChain)0165 (source: GitHub)0176 (source: GitHub)
Checked .
Alternatives in the same layer
Disclosures
- None