FastRouter.ai
FastRouter is a unified API gateway that provides enterprise AI teams with intelligent routing, cost optimization, and reliability across 200+ language models.
Our verdict
Who it's for
Unified API gateway for intelligent AI model routing and cost optimization
Who should look elsewhere
Advanced cost insights (model swap and compression recommendations) require a paid tier with token costs.
Pros
- +Unified API eliminates vendor lock-in and simplifies model management across providers.
- +Built-in cost optimization features (caching, flex tier, model swaps) can significantly reduce LLM spend.
- +Automatic failover and fallback models ensure high reliability and uptime for AI applications.
Cons
- −Advanced cost insights (model swap and compression recommendations) require a paid tier with token costs.
- −Self-hosting option is only available on the Enterprise plan, which may have higher pricing.
Key features
- ✓Automatic Model Selection: Routes each request to the best model based on complexity, domain, and cost.
- ✓Flex Pricing: Append :flex to eligible models for lower token costs on non-urgent workloads.
- ✓Prompt Caching: Reuses repeated prompt context at a fraction of the input price.
- ✓Virtual Model Aliases: Map one stable alias to multiple models and providers for seamless swaps without code changes.
- ✓MCP Gateway: Register MCP tool servers once and expose their tools to any routed model.
- ✓Insights: Weekly read-only analysis that identifies cost-saving opportunities with evidence and direct links to make changes.
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Starter | $0 | month | $0 markup on models; 3 organizations; Up to 5 virtual model aliases |
| Pro | $199 | month | $0 markup on models; 10 organizations; 20 members |
| Business | $799 | month | $0 markup on models; 100 organizations; 100 members |
| Enterprise | — | month | Self-hosted or managed, with custom limits and dedicated support; Custom terms · contact sales; Volume discounts available |