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Head-to-head · AI LLM Evaluation Tools

Opik vs Braintrust

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Opik #5 in AI LLM Evaluation Tools 9.0/10 Free plan Free plan✓ 0 of 3 features Visit Opik
Braintrust #7 in AI LLM Evaluation Tools 8.8/10 Free plan Free plan✓ 1 of 3 features Visit Braintrust

Opik 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 scoreOpik · 9.0/10
  • Lowest starting priceOpik · $19/mo
  • Free planboth
  • Most featuresBraintrust · 1 of 3

Opik scores higher on our rubric for ai llm evaluation tools: 9.0 against 8.8 out of 10; our editors rank them #5 and #7.

Opik is cheaper to start at $19/mo against $249/mo.

Opik is the better fit for teams wanting low-cost open-source evaluation monitoring. Braintrust is the better fit for organizations needing governed evaluation workflows.

  • Opik fits best

    Teams wanting low-cost open-source evaluation monitoring

  • Braintrust fits best

    Organizations needing governed evaluation workflows

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Opik 9.0/10 Visit ↗ Braintrust 8.8/10 Visit ↗
At a glance
Editor score 9.0 8.8
Ranking #5 in AI LLM Evaluation Tools #7 in AI LLM Evaluation Tools
Best for Teams wanting low-cost open-source evaluation monitoring Organizations needing governed evaluation workflows
Pricing model Free plan + paid Free plan + paid
Starting price $19/mo (best) $249/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Email, Community, Docs Community, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML SOC 2, GDPR, HIPAA, SSO/SAML, 2FA
Integrations 40+ integrations 50+ integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Opik 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
  • Open-source deployment with a full AI observability feature set
  • Traces model, tool, retrieval, and agent activity for debugging
  • Supports evaluations, prompt versioning, cost tracking, and human feedback
  • 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
  • Self-hosting requires teams to run the open-source distribution
  • Enterprise capabilities are available through a separate custom-priced tier
  • Its broad feature set may exceed the needs of simple LLM projects
  • 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

Opik is an open-source LLM observability and evaluation platform from Comet for teams building chatbots, RAG pipelines, and multi-step agents. It records model calls, tool invocations, retrieval steps, and agent actions, then supports…

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. OpikAI LLM Evaluation Tools 9.0Free plan
  2. BraintrustAI LLM Evaluation Tools 8.8Free plan

Strengths and trade-offs

  • Opik — where it wins

    • Open-source deployment with a full AI observability feature set
    • Traces model, tool, retrieval, and agent activity for debugging
    • Supports evaluations, prompt versioning, cost tracking, and human feedback

    Where it doesn't

    • Self-hosting requires teams to run the open-source distribution
    • Enterprise capabilities are available through a separate custom-priced tier
    • Its broad feature set may exceed the needs of simple LLM projects

  • 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