Braintrust
Braintrust offers managed open-source LLM evaluation and monitoring for AI applications. · Braintrust · AI
Overview
Braintrust provides managed open-source tools for evaluating and monitoring large language model outputs, helping teams ensure AI quality and reliability.
Good fit
Use Braintrust to evaluate and monitor LLM outputs in development or production for quality assurance and benchmarking.
- AI teams
- LLM app developers
- QA engineers
- Researchers
Not a fit
Avoid if you need evaluation for non-LLM models or require unlimited usage without cost.
- You need non-AI model monitoring
- You require unlimited evaluations for free
Quickstart · 5 steps
- Sign up for a free Braintrust account.
- Connect your LLM application using the provided SDK or API.
- Configure evaluation criteria and monitoring settings.
- Send LLM outputs for evaluation via API.
- Review evaluation results and monitor performance in the dashboard.
Other free ai options
Free tierWhat you get freeRiskCard
GitHub · AI
2,000 code completions per month · 50 chat requests per month (including Copilot Edits) · Agent mode, CLI, and MCP servers included with limited usage
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Google Cloud · AI
Sessions run up to 12 hours, depending on availability · GPU/TPU access heavily restricted on the free tier · Exact resource limits are not published and vary over time
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Google Cloud · AI
Free input and output tokens on supported models · Limited access to certain models · 5,000 free Google Search grounding requests/month, shared across Gemini 3.x models
Billing risk: None
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Hugging Face · AI
Unlimited public repos (best-effort free storage) · 100GB private storage · Storage limits apply across models, datasets, and buckets
Billing risk: None
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