Router by Ramp

Router by Ramp is an LLM gateway that sits between your application and dozens of AI models from providers like Anthropic, OpenAI, Grok, Fireworks, and more. Instead of managing separate API keys, billing accounts, and model selection logic for each provider, you get a single endpoint and a single invoice. Router automatically picks the lowest-cost model that meets your performance needs for every request, cutting inference costs by an average of 40% — and up to 92% in some cases.

The tool works by evaluating each request against a set of routing strategies — you can use the default smart routing, set up custom rules, or let Router learn from your workloads over time. It includes a CLI tool (with Switchyard mode) that shows real-time cost comparisons, and a dashboard where you can benchmark models on metrics like cost, latency, and throughput. Router also supports bring-your-own-key for providers you already have accounts with, and it offers free routing through 2026 plus $26 in model credits to get started. New cost-saving strategies are added automatically as they prove effective.

Router is built for engineering teams that want to optimize AI spend without sacrificing quality. It's especially useful for companies running high-volume LLM workloads — think customer support agents, code generation pipelines, or content summarization at scale. Finance teams appreciate the predictable billing and cost transparency, while developers get a single integration point that stays stable even as new models and providers appear. If your AI bill is growing faster than your revenue, Router is worth a look.