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Arcadium 3D vs RoomGPT

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Arcadium 3D publishes a starting price ($18); RoomGPT does not. Only Arcadium 3D has a free tier.

Arcadium 3DBrowser-based 3D floor plan and interior design tool with a 10,000+ piece furniture library, free to start.RoomGPTRedesigns a room photo into different interior styles

Side by side

FactArcadium 3DRoomGPT
CategoryInterior & Architectural DesignInterior & Architectural Design
Pricing modelFreemiumPaid
Starts at$18 month—
Public APINoNo
PlatformsWebWeb
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

Arcadium 3D

Arcadium is a reasonable pick for someone who wants to sketch a floor plan or interior layout in 3D without installing CAD software, and the free tier is generous enough to test with a real project. The 30-object cap on the free plan will feel tight the moment a room gets furnished in any detail.

Pros

  • Runs entirely in-browser with no install required
  • Large furniture library (10,000+ models) plus custom model import on paid plans
  • Link sharing makes it easy to show a design to someone else
  • Free tier for students and teachers

Cons

  • Free plan's 30-object cap is restrictive for a fully furnished room
  • Paid pricing shown is the annual-billed rate; monthly-billed cost may be higher
  • No API or offline/desktop version

RoomGPT

The fastest way to answer "what would this room look like in a different style", and the no-expiry credit model suits people who use it twice a year rather than twice a day. Treat the output as a mood board, not something a contractor can build from.

Pros

  • Credits are a one-time purchase with no expiry, confirmed in the vendor's own fulfillment policy
  • Single-photo input with no modelling, measuring or scene setup
  • Turnaround is fast enough to iterate live in front of a client

Cons

  • Output is a render with no dimensions, product links or shopping list
  • No API, no batch upload and no team workspace
  • Run by a single developer, so support and roadmap rest on one person
  • A discount code is permanently displayed on the site, which makes the list price hard to take at face value

Which one fits

Choose Arcadium 3D if you need

  • Homeowners or renters planning a room layout before buying furniture
  • Freelancers who need to share a 3D concept with a client via a simple link

Choose RoomGPT if you need

  • Homeowners testing decor directions before committing money
  • Agents producing quick visual concepts for a listing
  • Designers generating client mood boards during a call

More comparisons

All RoomGPT alternatives →Browse all Interior & Architectural Design →