Braintrust
Free tierThe AI observability platform for building quality AI products at scale
Free tier available·All audiences·API available
Key strengths
Agent trace observability and real-time monitoringEvaluation (evals) with LLM-as-a-judge, code, and human scoringPattern discovery and automated failure diagnosis from production tracesLoop AI agent for autonomous prompt/scorer/dataset generationBrainstore database with Nitro query engine for fast AI data retrievalSOC 2 Type II, HIPAA, GDPR compliance with hybrid deployment optionsFramework-agnostic with SDKs for multiple languages
Free tier + paid plans
US
Self-hostable
Facts verified against braintrust.dev on
Recent changes
- Plans updated: Starter: $0/mo (free tier, $10 model credits, 1 GB processed data, 10k scores, 14-day retention). Pro: $249/mo ($100 credits, 5 GB processed data, 50k scores, 30-day retention, RBAC, priority support). Enterprise: custom pricing with custom retention, on-prem or hosted deployment.
Get alerts when Braintrust changes
Free. We'll email you when pricing, the free tier, API access or open-source status changes.
No ratings yet
Braintrust — Developer Documentation & Integration
SDKs & Integrations
Braintrust is framework-agnostic and provides official SDKs across multiple languages:
| SDK | Language |
|---|---|
| Python SDK | Python |
| TypeScript SDK | TypeScript / JavaScript |
| Go SDK | Go |
| Ruby SDK | Ruby |
| C# SDK | C# / .NET |
Additional integrations include MCP (Model Context Protocol) and S3 for data ingestion and storage workflows.
API Access
A platform API is available for programmatic control of traces, evaluations, datasets, and scoring — enabling CI/CD integration and automated eval pipelines.
Evaluation Framework
- LLM-as-a-judge scoring: Use language models to evaluate agent outputs at scale.
- Code-based scoring: Define deterministic, rule-based scorers in your preferred SDK language.
- Human scoring: Route outputs to human reviewers within the same platform.
- Score volume limits by tier: 10k/month (Free), 50k/month (Pro), custom (Enterprise).
Data & Retention
- Processed data limits: 1 GB/month (Free), 5 GB/month (Pro), custom (Enterprise).
- Retention: 14 days (Free), 30 days (Pro), custom (Enterprise).
- Brainstore database with Nitro query engine handles high-throughput AI data retrieval.
Deployment Options
- Cloud-hosted (all tiers) or on-premises (Enterprise).
- Hybrid deployment supported.
- Compliance: SOC 2 Type II, HIPAA, GDPR.
Alternatives
See all alternatives