Side by side
Braintrust vs Langfuse
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
AI observability platform for building quality AI products.
Trace, evaluate, and improve AI agents with one open platform.
Primary task
AI observability
AI observability
Pricing
Freemium · Free + from $249/mo
Freemium · Free + from $29/mo
Pricing details
Free + from $249/mo
Free + from $29/mo
Billing cycle
Monthly
Monthly
API access
Not documented
Not documented
Platforms
Web
Web
Integrations
Not documented
Docker
Source rating
No rating recorded
No rating recorded
Catalog views
76
104
Estimated monthly traffic
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Catalog imported
30 Aug 2026
29 Aug 2026
Listed strengths
- Real-time tracing
- Live performance monitoring
- Automated alerts
- Side-by-side comparisons
- Automatic regression detection
- Open platform
- Supports any language
- Observability feature
- Evaluation feature
- Prompt Management feature
Listed limitations
- No mobile compatibility
- Complex trace database system
- No multi-lingual language support
- No free trial option
- Hybrid deployment complexities
- Requires OTel instrumentation
- May have high latency
- Reliance on external integrations
- Complex for new users
- No direct model training