Braintrust
Evaluation-first platform for logging, scoring, and comparing agent runs.
Managed
Best when product and engineering teams need fast experiment comparison across prompts, models, and tool paths.
Selection advice
Use Braintrust when eval comparison is the daily workflow and traces exist to explain score changes.
Best for
- experiment-driven agent iteration
- LLM-as-judge eval workflows
- cross-team quality review
Not ideal for
- teams that only need lightweight trace viewing
- workloads that cannot use a hosted eval platform
Core concepts
logsexperimentsscoresdatasetsplaygrounds
Minimal implementation shape
Log 30 pilot runs, define rubric scores for tool safety and answer quality, then compare two prompt versions side by side.