REX is a name more than one real estate company has used, which is exactly why the question deserves a precise answer. Here is what REX from Blok is, what it does, who it is built for, what it costs, and how it differs from a general AI chatbot.
Four platforms now decide what most buyers and sellers learn before they ever click a link. Most agents assume they work roughly the same way, and that showing up in one means showing up in all four. The measurement says otherwise, and in real estate the gap between those two beliefs is costing people listings.
Ask what an AI tool costs and you get a number. Ask what you are buying with it and most vendors get vague, which is unfortunate, because the second question is the one that determines whether the subscription is a bargain or a line item you cancel in March.
You can spot it in about four seconds. Nestled. Boasts. Stunning. A chef's kitchen in a house with a standard range. Every room described as spacious, and nothing in the whole listing that could only be said about this property.
Your mobile vs. desktop traffic split is a useful starting point. The real story is what visitors do once they arrive, from the pages they view to the actions that turn into inquiries.
Most agents evaluating AI start with the wrong question. They ask which model is smartest. The models are all capable. What separates a tool that changes your week from one you stop opening after nine days is how much of your business you have to explain to it before it becomes useful.
Agents ask this every week, usually right after a general AI tool produced something that looked like a CMA and turned out to be unusable in front of a seller. The honest answer separates two very different jobs: formatting a CMA and sourcing one.