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LangSmith Engine

Agent optimization · by LangChain

Surface and diagnose undetected issues autonomously to improve agents faster; clusters production failures into prioritized issues, finds the root cause in traces and code, and proposes the fix for review.

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Where it ranks

Current edition · updated Oct 20, 2026

What it does

Surface and diagnose undetected issues autonomously to improve agents faster; clusters production failures into prioritized issues, finds the root cause in traces and code, and proposes the fix for review.

  • Build AI agents
  • Test AI agents
  • Deploy AI agents
  • Observe AI agents
  • Evaluate AI agents
Category
Agent optimization
Users
Solo developers, Teams building and deploying agents, Enterprises with advanced hosting and security needs, VC-backed startups
Public API
Not offered

Not yet disclosed: deployment options, platforms, languages and support channels.

Pricing

  • Subscription$39/seat/month
    • Per month for Plus
    • Plus Engine usage at $1 / LSU

Prices as published by LangChain, checked Oct 2026.

Security and compliance

As reported by LangChain. Ask for audit reports before you buy.

  • SOC 2 Type IICompliant
  • ISO/IEC 27001Compliant
  • HIPAACompliant
  • Encryption at transit
  • Encryption at rest
  • Penetration testing performed at least annually

Reviews

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