Braintrust

Braintrust, made by Braintrust Data, Inc., is an observability and evaluation platform designed specifically for AI agents running in production, enabling teams to monitor agent performance, test quality through evaluations, and automatically discover patterns in production data. It offers Observe, real-time inspection of agent traces, prompts, responses, and tool calls with searchable logs; Evaluate, testing through LLM-based, code-based, or human scoring with experiment comparison; and Discover, automatic pattern detection via a 'Topics' feature that identifies issues and sentiment across production traces. Braintrust includes a Loop Agent for AI-assisted optimization of prompts, scorers, and datasets, a proprietary Brainstore database optimized for complex nested agent trace data, native SDKs across Python, TypeScript, Go, Ruby, and C#, and custom facets with trace-to-dataset conversion. It is used by enterprise customers including Coursera, Notion, Cloudflare, Vercel, Box, and Replit. Pricing is not publicly detailed on the homepage; the platform references flexible plans for teams of all sizes on its pricing page, with a contact-sales option for enterprise needs.