Braintrust vs Lunary

Side-by-side comparison of Braintrust and Lunary: pricing, features, API access, and community ratings.

AI comparison summary

TL;DR: Both platforms offer core AI observability and tracing, but Braintrust differentiates with automated pattern discovery through Topics clustering, a purpose-built database for AI traces, and quality gates to prevent bad deployments. Lunary focuses more on security compliance (SOC 2, ISO 27001) with PII masking and offers self-hosting options via Kubernetes/Docker. Braintrust's freemium model provides a free tier, while Lunary is paid-only.

	Braintrust The AI observability platform for building quality AI products at scale Visit	Lunary Build AI agents with confidence Visit
Category	AI observability	AI observability
Pricing	Freemium	Paid
Starting price		USD 20/mo
Free tier
Audience	All audiences	All audiences
API available
Open source
Self-hostable
Model provider
Founded
Headquarters	US
Key strengths	·Real-time trace inspection for prompts, responses, and tool calls ·Automated pattern discovery via Topics clustering ·Flexible eval scoring with LLMs, code, or human reviewers ·Custom-built Brainstore database optimized for AI trace data at scale	·LLM observability and tracing ·Agent monitoring and error tracking ·Prompt management and versioning ·PII masking and security (SOC 2 Type II, ISO 27001)

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