LangSmith
by LangChainDebug, test, and monitor your LLM apps — the observability platform built by the LangChain team
Tracing, evaluation, prompt management, dataset curation, monitoring, LangGraph integration
Last updated: March 29, 2026 · Pricing verified from official sources. Prices are subject to change by the provider.
Pricing
Price stable
Free TierYes — 5K traces/mo
Entry Plan$39/seat/mo Plus
Team Plan—
EnterpriseCustom pricing
API PricingSDK (Python/JS)
See full API pricing & compare models →Prices exclude applicable taxes (VAT/GST/sales tax varies by region). Monthly prices shown — annual plans typically save 15-20%.
Specifications
Context / Input—
Max OutputTraces, evaluations, dashboards
ModalitiesText
Agent / AgenticNo
SecuritySOC 2
Self-hostedNo
LangSmith — Who Is It Best For?
LangChain users, LLM debugging, production monitoring
Ideal for:DevelopersFounders
✅ Strengths
• Free tier available
• SOC 2 certified
• Tracing
💭 Consider
• Cloud-only (no self-hosting)
• Enterprise plan may be required for teams
💡 Budget tip: Start with LangSmith's free tier to test it. Paid plans start at $39/mo. For a free alternative, check out Helicone.
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Helicone
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PromptLayer
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W&B
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Maxim AI
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Frequently Asked Questions
How much does LangSmith cost?
LangSmith offers a free tier. Paid plans start at $39/month. Enterprise pricing is available on request.
Is LangSmith free?
Yes, LangSmith offers a free tier with limited features. For full access, paid plans start at $39/month.
What is LangSmith best for?
LangSmith is best for LangChain users, LLM debugging, production monitoring. Key features include: Tracing, evaluation, prompt management, dataset curation, monitoring, LangGraph integration.
Is LangSmith right for you?
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AiToolsMentor.com · Pricing verified March 29, 2026 · AI Tools Mentor Fit Score