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Head-to-head · AI LLM Evaluation Tools

LangSmith vs Braintrust

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score LangSmith #4 in AI LLM Evaluation Tools 9.1/10 Free plan Free plan✓ 0 of 3 features Visit LangSmith
Braintrust #7 in AI LLM Evaluation Tools 8.8/10 Free plan Free plan✓ 1 of 3 features Visit Braintrust

LangSmith leads on 1 check, Braintrust on 0, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreLangSmith · 9.1/10
  • Lowest starting priceLangSmith · $39/seat/mo
  • Free planboth
  • Most featuresBraintrust · 1 of 3

LangSmith scores higher on our rubric for ai llm evaluation tools: 9.1 against 8.8 out of 10; our editors rank them #4 and #7.

LangSmith is cheaper to start at $39/mo against $249/mo.

LangSmith is the better fit for langChain-based teams needing a mature platform. Braintrust is the better fit for organizations needing governed evaluation workflows.

  • LangSmith fits best

    LangChain-based teams needing a mature platform

  • Braintrust fits best

    Organizations needing governed evaluation workflows

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Side by side

Feature LangSmith 9.1/10 Visit ↗ Braintrust 8.8/10 Visit ↗
At a glance
Editor score 9.1 8.8
Ranking #4 in AI LLM Evaluation Tools #7 in AI LLM Evaluation Tools
Best for LangChain-based teams needing a mature platform Organizations needing governed evaluation workflows
Pricing model Free plan + paid Free plan + paid
Starting price $39/seat/mo (best) $249/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Community, Email, Tickets, Docs · 24/7 Community, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML SOC 2, GDPR, HIPAA, SSO/SAML, 2FA
Integrations 7 integrations 50+ integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features LangSmith 0/3 · Braintrust 1/3
Safety evaluations Not checked yet Not checked yet
Prompt versioning Not checked yet ✓ (best)
API access Not checked yet Not checked yet
Specs
Evaluation methods Not checked yet Not checked yet
Model support Not checked yet Not checked yet
Deployment Not checked yet Not checked yet
Our review
Pros
  • Tracing, evaluations, prompt versioning, datasets, and monitoring in one platform
  • Supports LangChain, LangGraph, major model providers, and OpenTelemetry
  • Cloud, hybrid, and self-hosted deployment options
  • Offline, online, human, custom, and LLM-as-a-judge evaluations
  • Production tracing, prompt rollback, and CI/CD regression gates
  • Hosted or self-hosted deployment with RBAC on paid plans
Cons
  • Usage-based charges apply after included trace allowances
  • Enterprise pricing is custom rather than publicly listed
  • The Developer plan is limited to one seat
  • Pro starts at $249 per month before usage-based charges
  • Starter retention is limited to 14 days
  • Enterprise pricing and some deployment options require a custom plan
Our verdict

LangSmith is a commercial platform from LangChain Inc. for developing, testing, monitoring, evaluating, and deploying LLM applications and agents. It is designed for LangChain- and LangGraph-based teams, while also supporting applications…

Read the review →

Braintrust is an evaluation and observability platform for teams building AI applications and agents. It supports dataset and experiment management, offline and online evaluations, production tracing, prompt versioning, human review,…

Read the review →
  1. LangSmithAI LLM Evaluation Tools 9.1Free plan
  2. BraintrustAI LLM Evaluation Tools 8.8Free plan

Strengths and trade-offs

  • LangSmith — where it wins

    • Tracing, evaluations, prompt versioning, datasets, and monitoring in one platform
    • Supports LangChain, LangGraph, major model providers, and OpenTelemetry
    • Cloud, hybrid, and self-hosted deployment options

    Where it doesn't

    • Usage-based charges apply after included trace allowances
    • Enterprise pricing is custom rather than publicly listed
    • The Developer plan is limited to one seat

  • Braintrust — where it wins

    • Offline, online, human, custom, and LLM-as-a-judge evaluations
    • Production tracing, prompt rollback, and CI/CD regression gates
    • Hosted or self-hosted deployment with RBAC on paid plans

    Where it doesn't

    • Pro starts at $249 per month before usage-based charges
    • Starter retention is limited to 14 days
    • Enterprise pricing and some deployment options require a custom plan

More comparisons

All AI LLM evaluation tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update