AI Gateway vs MCP Gateway vs Agent Gateway: What Each One Does (And When You Actually Need Them)

If you’ve been building with AI recently, you’ve probably seen these terms everywhere: AI Gateway. MCP Gateway. Agent Gateway. And depending on where you read, they either sound like the same thing… or completely different systems. Which is exactly how teams end up building the wrong layer for the wrong problem. Some vendors use them interchangeably. Others define only one and ignore the rest. And if you try to piece it together yourself, you end up with a vague understanding that doesn’t really