Decato

Most interior tools stop at a picture. You arrange a room, it looks right, and then you are on your own to find out what that sofa is, whether it is in stock, what it costs and whether it fits through the door.

Decato works the other way round. The floor plan comes first, so the room is a set of wall lengths and door swings before it is ever an image. Real, in-stock products are matched against those numbers, and anything that will not clear a walkway or a door swing is dropped before you see it. What comes back is a priced specification, plus a render assembled from those exact products rather than invented ones, and a client-ready deck that exports to PDF with every product row linking to its shop page.

It is a Mac app — macOS 12 or later, Apple Silicon and Intel, no account needed to install. Floor planning is unlimited and free: the agent runs on your own ChatGPT, Claude or Gemini subscription. Product matching and photoreal renders start at $20 a month. A Windows version is planned; there is no mobile app.