Braintrust
AI observability and evaluation platform for tracing LLM apps, running evals and catching quality regressions before release.
What it does
Braintrust is an observability and evaluation platform for teams building LLM products. It traces prompts, responses and tool calls in production, lets teams score outputs with LLMs, code or humans, and turns real traces into eval datasets, with automated pattern discovery and quality gates.
Core features
Real-time trace and tool-call inspection
Evals with LLM, code or human scoring
Versioned datasets built from production traces
'Topics' automatic pattern discovery and online scoring
Quality gates and regression alerts
SDKs for Python, TypeScript, Go and more, plus an MCP server
Best for
→Monitoring LLM apps in production
→Comparing prompts and models via experiments
→Building regression tests from real failures
Pricing
Starter
$0/mo
Pro
$249/mo
Toolspool rankingby global site rank
Reviews
Big-picture takes: what it's for and whether it delivers. High-engagement YouTube videos — not sponsored.