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LangSmith
Observability and evaluation for LLM apps
Consider with caveatsAPIFree tierSOC 2
Overall score
3.7/ 5
SME Fit3/5
usage-metered pricing + free tier
JTBD4/5
solid named JTBD
Integration4/5
API + 6 integrations
Trust3/5
growing, founded 2022
Quality4/5
4.5 on G2 (85 reviews)
Compliance5/5
SOC 2 + GDPR + customer-choice residency
About
LangSmith is LangChain's observability platform for tracing, evaluating, and monitoring LLM applications and agents. It supports any framework and offers prompt management, dataset evaluation, and online monitoring of production traces.
Best for: AI engineering teams who need to debug, evaluate, and monitor LLM-powered features in production.
Pricing
| Tier | Monthly | Annual /mo | Billing | Notes |
|---|---|---|---|---|
| Developer | — | Free | usage_based | 1 user;5K base traces/mo;Pay-as-you-go beyond · $0.50 per 1K base traces over included |
| Plus | $39 | $39 | per_user | 10K base traces/mo;Higher rate limits;Email support · Per seat plus usage |
| Enterprise | — | — | seat_based | SSO;Self-hosted option;Custom data residency;Dedicated support · Contact sales |
Key features
- Trace inspection
- Online and offline evals
- Prompt hub with versioning
- Dataset management
- Production monitoring
- EU data residency option
Integrations
LangChainLangGraphOpenAIAnthropicVertex AIOpenTelemetry
Trust & compliance
- Stage range
- MVP → Growth
- Founded
- 2022
- Status
- active
- SOC 2
- yes
- GDPR
- yes
- Data residency
- customer_choice
- External rating
- 4.5 on G2 (85 reviews)
- Last verified
- May 2026
Reviews
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