Braintrust

End-to-end evaluation platform combining evals, logging, prompt management, and an AI proxy — used by enterprises like Notion and Stripe.

GrowingOpen SourceLow lock-in
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Pricing

Free tier

Hybrid

Adoption

→Stable

License

Open Source

Overview

What is Braintrust?

Enterprise AI evaluation, logging, and prompt management platform

Key differentiator

“End-to-end evaluation platform combining evals, logging, prompt management, and an AI proxy — used by enterprises like Notion and Stripe.”

Capability profile

Capability Radar

Ease of StartEcosystemValueMaturityFlexibilityScale Ready

Honest assessment

Strengths & Weaknesses

↑ Strengths

Evaluating LLM outputs systematically

Curated assessment

Prompt versioning and A/B testing

Curated assessment

Logging and tracing AI application behavior

Curated assessment

↓ Weaknesses

Non-LLM ML model evaluation

Curated assessment

Simple one-off testing

Curated assessment

Cost structure

Pricing

Free Tier

Available

Free tier with usage limits

Starts at

Free (OSS) / Team plans available

Model

Hybrid

Enterprise

Available

View full pricing details ↗

Performance benchmarks

How Fast Is It?

Ecosystem

Relationships

Next step

Get Started with Braintrust

Step-by-step setup guide with code examples and common gotchas.

View Setup Guide →