Side-by-side

Opik vs Braintrust

OpikBraintrust

Bottom line: Opik for teams wanting open-source eval plus tracing; Braintrust for teams making evaluation a first-class part of development.

	Opik Open-source LLM evaluation, tracing, and observability by Comet. Visit	Braintrust Eval-first evaluation and observability platform for AI applications. Visit
Votes	0	0
Pricing	Freemium	Freemium
Category	Coding	Coding
Tags	llm-evaluationobservabilityopen-sourcetracingmonitoring	llm-evaluationobservabilityprompt-engineeringci-cdllmops
Best for	Teams wanting open-source eval plus tracing LLM engineers doing eval-driven development Organizations that value self-hostability	Teams making evaluation a first-class part of development Organizations wanting CI/CD quality gates for AI Product and AI engineering teams iterating on prompts
Pros	Full platform is Apache-2.0 and free to self-host Combines tracing and evaluation in one tool LLM-as-a-judge and many automated metrics Fast-growing, widely adopted open-source project Integrates with Comet's ML ecosystem	Deep, eval-first feature set with scorers, experiments, and statistical rigor Strong CI/CD integration to catch regressions before deploy Usage-based pricing with unlimited users, so no per-seat penalty Powerful playground for prompt iteration and comparison Tight loop between production logs and evaluation datasets
Cons	Crowded, competitive category Self-hosting requires running infrastructure Managed cloud limits (spans, seats) on lower tiers Evaluation quality depends on judge configuration Deep value tied to adopting the workflow	Not open source; source-available and hosted model Self-hosting locked to the Enterprise tier and a license key Big price jump from free to $249 per month SSO, RBAC, and self-host are gated behind Enterprise Data- and score-based billing makes costs less predictable at volume

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