Overview

Braintrust is the only observability platform that integrates evaluation directly into the monitoring workflow. Instead of just showing you what your agent did, it scores how well it performed using customizable quality metrics. This closes the feedback loop between testing and production, enabling teams to catch quality regressions before users notice.

The platform allows you to set up automated evaluations that run on every agent session, tracking quality trends over time and alerting when performance drops below thresholds. You can A/B test different prompts, models, or agent configurations in production and see real-time metrics on accuracy, relevance, safety, and custom scoring.

Braintrust provides comprehensive cost analytics with per-request tracking, token breakdowns, and spend visualization by agent, model, and time period. The multi-step trace visualization shows complete agent workflows with timing and costs for each step, making it easy to identify bottlenecks and optimize expensive operations.