Side by side
FastRouter vs LettiB
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
Lightning Fast LLM Gateway
One workspace for every AI model.
Primary task
LLM comparison
LLM comparison
Pricing
Free Trial · Trial; then from $5
Freemium · Free + from $15/mo
Pricing details
Free + from $5
Free + from $15/mo
Billing cycle
Pay-as-you-go
Monthly
API access
Listed as available
Listed as available
Platforms
Web
Web
Integrations
Not documented
Not documented
Source rating
4.5 / 5 · 2 ratings
No rating recorded
Catalog views
8.4k
410
Estimated monthly traffic
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Catalog imported
30 Aug 2026
31 Aug 2026
Listed strengths
- Unified API gateway
- Automatic model selection
- Optimizes cost and performance
- Real-time usage tracking
- Custom evaluations
- Synthesized information from models
- Connects with various providers
- Organizing with project folders
- Project memory feature
- Ownership of data
Listed limitations
- No multi-language UI
- Dependent on external model providers
- No support for fine tuning
- No open-source for scrutiny
- No offline functionality
- Limited concurrent model comparison
- No collaborative features
- Lacks third-party integrations
- No mobile support
- Direct API key insertion