Top 5 AI Gateway Companies in 2026 (Ranked for Enterprise Teams)

Enterprise LLM spending surged past $8.4 billion in 2026, and with it came a brutal reality check: getting a model to work in a demo is easy. Getting it to work reliably, securely, and cost-efficiently across an organization of thousands? That's an infrastructure problem. And the infrastructure layer solving that problem right now is the AI Gateway. An AI Gateway sits between your applications and your LLM providers. It handles routing, authentication, rate limiting, cost tracking, observability, and — increasingly — MCP-based tool integrations for agentic workflows. Without one, you're dealing with vendor lock-in, no fallback strategy, scattered API keys, and zero visibility into what your models are actually doing in production. There are a lot of players in this space. These are the 5 that matter most right now. 1. TrueFoundry — The Enterprise AI Gateway Built for Governance and Agentic Scale TrueFoundry isn't just an AI Gateway — it's the most complete answer to enterprise AI infra