Prototype
A simulated version of a product or feature — ranging from paper sketches to clickable Figma flows — used to test ideas with users before engineering investment.
What is a Prototype?
A prototype is an early model of a product used to test a concept before committing to full development. Prototypes range from rough paper sketches to high-fidelity interactive simulations — the appropriate fidelity depends on the question being tested.
Prototype fidelity vs. purpose
| Fidelity | Purpose | Tools |
|---|---|---|
| Paper / sketch | Explore many ideas quickly | Paper, whiteboard |
| Clickable wireframe | Test flow and information architecture | Figma (lo-fi) |
| Hi-fi interactive | Test visual design and micro-interactions | Figma, Framer |
| Coded prototype | Test performance and real data | React, Next.js |
| Concierge / wizard | Test demand before building anything | Humans doing it manually |
The rule of appropriate fidelity
Use the lowest fidelity that can answer your current question. A paper sketch to test if users understand a flow costs 1 hour. A coded prototype for the same test wastes a sprint.
Prototype vs. MVP
| Prototype | MVP |
|---|---|
| Tests a design hypothesis | Tests a product hypothesis |
| Simulates behaviour | Real working behaviour |
| No backend needed | Backend required |
| Throw away after testing | Foundation for v1 |
Free templates for Prototype
Frequently asked questions
What questions can a prototype answer that an MVP can't?
Whether users understand the flow, whether the information architecture makes sense, whether the copy is clear, and whether users know what to do next — all before a line of production code is written. Prototypes test usability; MVPs test value and retention.
How many users should you test a prototype with?
5 users per round of testing is the classic Nielsen Norman guideline — enough to identify 80–85% of usability issues. Run 3–5 users, fix the major issues, run another 3–5. Avoid large-sample usability studies — they're expensive and the last 15 users rarely surface new issues.
Apply Prototype to your real product data
PMRead ingests customer feedback, interviews, and Slack threads — and generates PRDs grounded in real evidence.
Related terms
MVP (Minimum Viable Product)
The smallest version of a product that delivers enough value to attract early adopters and generate validated learning about your core assumptions.
UX (User Experience)
The overall quality of a user's interaction with a product — encompassing usability, accessibility, performance, and emotional response — not just visual design.
Wireframe
A low-fidelity visual representation of a product screen that shows layout and structure without visual design — used to communicate information architecture and user flows early in the design process.