Braintrust

Braintrust: Ship Quality AI at Scale

Braintrust is the AI observability and evals platform built for teams who want every release to make their AI better, not worse. Turn production traces into evals, compare prompts and models side-by-side, and improve quality with every release. Recently announced an $80M Series B and trusted by Airtable, Notion, Ambience, Instacart, Stripe, KeyBank, Dropbox, Ramp, Coursera, Replit, Superhuman, Granola, Dia, MongoDB, Cloudflare, and Box.

Where most observability tools stop at logging, Braintrust closes the loop: real-time inspection of production traces, prompt and model comparison in a structured eval workflow, and quality tracking that gives you the confidence to ship.

Key Features:

• Real-time production trace inspection
• Convert production traces into structured evals
• Compare prompts and models side-by-side
• Quality scoring with custom metrics
• Live monitoring with alerts
• Deep filtering and search across traces
• Integrations with major LLM providers
• Used by Airtable, Notion, Stripe, Dropbox, Ramp, Replit, Superhuman, MongoDB, and Cloudflare
• $80M Series B (announced)
• Free tier for individuals, paid for teams and enterprise

Ideal Use Case:

Braintrust is ideal for AI product teams shipping LLM features at scale who need to systematically improve quality release-over-release. Especially strong for teams running customer-facing agents where regressions are visible and costly.

Why Use Braintrust:

• Close the loop from production traces to evals
• Compare prompts and models with confidence
• Trusted by the best AI teams in the industry
• Funded for the long haul ($80M Series B)
• Free to start

FAQ

Is Braintrust free to start? Yes — free tier for individuals; paid plans for teams and enterprise.

Can I turn production traces into evals? Yes, that is the core workflow.

Who is using Braintrust? Airtable, Notion, Ambience, Instacart, Stripe, KeyBank, Dropbox, Ramp, Coursera, Replit, Superhuman, Granola, Dia, MongoDB, Cloudflare, and Box.

Does Braintrust support model comparison? Yes — compare prompts and models side-by-side as part of the eval workflow.

tl;dr:

Braintrust is the AI evals and observability platform — turn production traces into evals, compare prompts and models, and ship quality AI at scale. Trusted by Notion, Stripe, Dropbox, and many more.

Related

Looking for more options? Browse the AI Infrastructure directory or read our best AI infrastructure tools listicle. Braintrust is also tracked on Crunchbase.