Open Source Go LLM Gateways

Bifrost is an LLM gateway designed to provide a unified OpenAI-compatible API front for many different model providers. It abstracts away the complexity of working directly with multiple backend providers (OpenAI, Anthropic, AWS Bedrock, Google Vertex, etc.), enabling you to plug in providers and switch between them without touching your client code. It is built to be high performance: in benchmark tests at 5,000 requests per second, it reportedly adds only microseconds of overhead and achieves perfect success rates with no failed requests. Bifrost supports features such as automatic fallback (failover between providers), load balancing across API keys/providers, and semantic caching to reduce latency and cost. It also includes observability with built-in metrics, tracing, logging, and supports governance features like rate limiting, access control, and cost budgeting. The architecture is modular: there is a core engine, plugin layers, and transport layers (HTTP APIs).

GoModel is the last AI Gateway you'll ever try. It's the most secure, the fastest, and the most reliable AI Gateway according to self-verifiable benchmarks. The best open-source alternative to LiteLLM, GoModel provides a unified OpenAI-compatible API for OpenAI, Anthropic, Gemini, Groq, xAI, Ollama, vLLM, Amazon Bedrock, OpenRouter, and many more providers. Built in Go, it's lightweight, resource-efficient, and designed for production workloads with extremely low latency. GoModel includes intelligent request routing, observability, guardrails, live logs, usage and cost tracking, rate limiting, virtual models, prompt rewriting, streaming support, and enterprise-ready authentication. Whether you're building AI applications, running coding agents, or deploying LLM infrastructure at scale, GoModel gives you a fast, reliable, and self-hostable foundation. If you're looking for a modern AI Gateway that is faster, simpler, and more efficient than LiteLLM, GoModel is built for you.