A high-fidelity Figma prototype is seductive: it looks and feels like a finished app. That is exactly why it misleads founders into thinking they are further along than they are. Here is the real gap.
The short answer
A Figma prototype simulates the look and flow of a product with no working code or data behind it. A product simulation is the product actually running, real code, a real database, that your team builds forward from. One is a convincing picture; the other is a runnable foundation.
What a prototype is great at
- Design and flow feedback. Click through screens, test whether the experience makes sense.
- Speed and cost. Fast and cheap to produce and change.
- Stakeholder buy-in. A polished prototype helps people picture the product.
For those jobs, a prototype is the right tool. Use it.
The gap "it looks done" hides
The danger is treating the prototype as progress on the build. It is not:
- No code. When everyone approves the prototype, engineering still starts from nothing.
- No data model. The hardest, most consequential decisions, how the data is structured, have not been made.
- No architecture. Nothing about how it will actually work has been decided.
- Not runnable. You cannot put real data through it or hand it to a developer to continue.
So a prototype can make you feel 70 percent done when you are closer to 10 percent of the build.
Where a product simulation picks up
A product simulation is what "actually built" looks like at the foundation stage: the screens are backed by real code, the data model is designed and running, and the architecture is in place and documented. Your team inherits something that runs, not a picture to rebuild from scratch.
Use a prototype to decide what to build. Use a product simulation to actually start building it. Start a project for a clear, flat-rate scope.
Frequently asked
Isn't a Figma prototype enough to raise money or test an idea?
It can be enough for design feedback and some early conversations. But investors and customers increasingly expect something real, and a prototype gives your future dev team nothing to build on, the engineering still starts at zero.
Should I skip the prototype entirely?
Not necessarily. A prototype is a cheap, fast way to get design and flow feedback. Just do not mistake it for a head start on the build, because it is not.