Bifrost
A fast, open-source LLM gateway written in Go, with one API across providers.
Bifrost is an open-source AI gateway built for throughput: written in Go and benchmarked to add very little overhead at high request rates. It offers one unified API across providers, with fallbacks, load balancing, and MCP support.
It positions itself as the performance-first option for teams that want a self-hosted gateway that disappears under load.
Where it fits
A fit when you self-host a gateway under heavy traffic and per-request overhead has to stay minimal.
Where it does not fit
A younger project than the established gateways: less of a fit when ecosystem depth outweighs raw speed.
Alternatives to Bifrost
The closest options on the map, and where each fits instead.
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LiteLLM LLM gateway
The right layer when a system uses several model providers and you want routing, keys, and spend controlled in one place.
Unlike Bifrost Maturity: established
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Portkey AI gateway
A good fit when you want routing and observability from one layer rather than integrating a gateway and a monitoring tool separately.
Unlike Bifrost Hosted API
Pairs with
Commonly used alongside it.
