Why does Prototype vs. MVP matter?
Confusing the two produces the wrong artifact for the question you're actually asking. A prototype answers "can this be built" or "does this look right to someone". It can be fake in every way that doesn't matter to that question, including having no backend at all. An MVP answers "will someone actually change their behavior for this", and that question cannot be answered by anything a person only looks at, because looking is not using. Building a full MVP when a prototype would have answered the question wastes months; showing a prototype and calling the reaction validation skips the only test that matters.
What does Prototype vs. MVP look like in practice?
Suppose the question is whether a scheduling interface is intuitive enough for a receptionist mid-call. A clickable Figma prototype answers that in an afternoon of watching someone tap through it, no real data, no backend, nothing at stake for them. Suppose instead the question is whether a practice will actually change its process to use software for bookings. That requires the real thing handling real patients for a few weeks, because only real stakes produce real behavior. The same team might need both, in that order, for different questions.
What are the common mistakes with Prototype vs. MVP?
- Calling a prototype an MVP because it took real engineering effort, effort doesn't make it usage.
- Treating positive prototype reactions as product-market fit signal rather than as feasibility or usability signal, which is all a prototype can tell you.
- Building a full MVP to answer a question a prototype would have settled in a day.
- Skipping the prototype stage and discovering a fundamental usability problem only after real customers are already depending on the product.
Related concepts
- Minimum Viable Product (MVP)The smallest thing you can build that produces a real answer to the riskiest question about your business, not the smallest version of the product you intend to build.
- Problem Validation vs. Solution ValidationTwo separate tests: whether the problem is real and painful enough that people already do something about it, and whether your particular solution is one they would use and pay for.
- Design PartnerAn early customer who commits to working closely with you while you build, giving real feedback and real usage in exchange for influence over the product and usually favorable terms.