Best open-source AI gateways in 2026

Open-source AI gateways provide a crucial intermediary layer between applications and multiple LLM providers, simplifying complex interactions by unifying them behind a single endpoint. These gateways offer features like routing, failover, caching, rate limiting, cost tracking, and observability, each catering to different needs such as provider compatibility, high throughput, and semantic caching. Tools like LiteLLM, Bifrost, Portkey Gateway, Kong AI Gateway, and RouteLLM vary in their offerings, with some excelling in broad provider coverage and others in performance optimization or built-in governance. While the software itself is open-source and free, running these gateways in production involves managing infrastructure and operational requirements, including secrets management, RBAC, audit logging, and autoscaling. Northflank facilitates the deployment and management of AI gateways, offering a platform that supports either self-serve or managed cloud environments, ensuring secure and efficient operations.

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