Bifrost

Bifrost is an open-source enterprise AI gateway built for reliability, governance, and scale. It provides a unified interface to 1,000+ AI models across 8+ providers, with adaptive load balancing, provider fallback, guardrails, an MCP gateway, budgeting, virtual key management, and built-in observability. Bifrost is compatible with OpenAI, Anthropic, Google GenAI, LiteLLM, LangChain, Vercel AI SDK, and other AI SDKs, and is designed as a drop-in replacement with a one-line code change. The official site reports 20 microseconds of added latency and 5,000 requests per second throughput; its official benchmark reports 50x faster P99 latency than LiteLLM at 500 RPS on identical hardware. Bifrost is open source under the Apache 2.0 license, with a 14-day Bifrost Enterprise trial available.