Braintrust

Braintrust is an AI observability platform that helps teams build, evaluate, and improve quality AI products and agents. The platform offers three core pillars: Observe, which inspects agent traces, tool calls, prompts, and responses in real time with scalable ingestion and performance monitoring; Evaluate, which enables prompt engineering, versioned datasets, and automated and human scoring of outputs; and Discover, which uses automatic pattern discovery called Topics to surface issues in production, run continuous online scoring, and enforce quality gates. Braintrust also features Loop, an AI agent that generates optimized prompts, scorers, and datasets, and Brainstore, a database built specifically for complex agent traces. The platform is SOC 2 Type II certified, GDPR and HIPAA compliant, with native SDKs for Python, TypeScript, Go, Ruby, and C#. Founded in 2023 and headquartered in San Francisco, California, Braintrust has raised $121.1M in Series B funding from investors including Andreessen Horowitz, Greylock Partners, Databricks, Datadog, SV Angel, and Iconiq Capital.