AI Agent vs Assistant vs Chatbot: What's Actually Different

The word "agent" now gets attached to almost everything. A support widget, an email summarizer, a coding tool that edits files on its own. They all get called agents, which makes it hard to tell what you're actually looking at. That matters if you're choosing a tool for your team or building one. The label affects how much you trust it, how you set it up, and what can go wrong. So here's a way to tell them apart that doesn't depend on the marketing. Ignore the name and ask one question: who decides the next step? Three patterns, not three product types Chatbot, assistant, and agent aren't separate boxes of software. They're patterns of behavior, and one product can show more than one. An agent will happily answer a simple question like a chatbot. A chatbot can be wired to call a tool. What matters is what the system is doing at that moment. Chatbot pattern: mostly conversation. You ask, it responds. It isn't pursuing a goal across multiple steps. Assis…