Braintrust is an enterprise-grade evaluation platform for AI products that helps teams systematically measure, debug, and improve LLM performance. It provides a playground for prompt engineering, automated eval pipelines, dataset management, and detailed logging of every LLM call in production. Teams at Stripe, Airtable, and other fast-growing companies use Braintrust to run rigorous benchmarks, catch regressions before they ship, and build confidence in their AI systems.