Braintrust
FreemiumAI evaluation and observability platform for testing prompts, models, and agents in production.
Tool Info
Overview
Braintrust is a platform for evaluating and improving AI applications through experiments and datasets.
Teams log runs, score outputs, and compare prompt versions collaboratively.
Popular with AI-native product companies.
Features
- Experiment tracking
- Human and auto eval
- Playground
- CI integration
- Datasets
Pricing
Pros
- Excellent DX
- Production-grade platform
- Strong experiment UI
Best For
When NOT to Use
- Cloud-first
- Paid for team features
Typical Users
Community Insights
Real implementation experiences shared by AI practitioners.
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Related Tools
Alternatives
Tags
Related Guides
- LLM Evaluation
Measuring LLM output quality — automated checks, rubrics, LLM-as-judge, human calibration, and CI eval pipelines for generation.
- Prompt Evaluation
Systematically testing prompts — versioning, A/B comparison, format compliance, and regression detection in CI.
- AI Observability
Production observability for LLM systems — traces with prompt/completion/tool spans, cost and latency attribution, quality proxies, and PII-safe instrumentation.
- Agent Evaluation
Evaluate AI agents on task success, trajectory quality, tool-call accuracy, groundedness, safety, latency, cost, and production traces.
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