Founders hear three terms thrown around constantly — MVP, prototype, and proof of concept (POC) — usually as if they mean the same thing. They don't, and confusing them is a genuinely expensive mistake. Ask for the wrong one and you either overspend on something you didn't need yet, or underbuild something you're about to show investors. Here's the plain-English difference and how to choose.
Proof of concept (POC): "Can this even be done?"
A POC answers a single technical question: *is this possible?* It's small, throwaway, and built for you and your team — not for users. Nobody outside the room ever sees it.
You need a POC when your product depends on something genuinely uncertain: a hard algorithm, a tricky integration, an AI capability you're not sure is reliable enough. If the risky part fails, you want to know for a few hundred or few thousand dollars — not after a full build.
If your idea is a fairly standard app (a marketplace, a booking tool, a dashboard), you probably don't need a POC. The technology is proven; the risk is whether people want it.
Prototype: "What will it look and feel like?"
A prototype is about experience, not engineering. It's a clickable mockup — often built in a design tool like Figma — that looks real but has no working code underneath. Buttons navigate; nothing is actually saved or processed.
Prototypes are fast and cheap, and they're gold for three things: showing investors or stakeholders the vision, testing whether the flow makes sense to real people, and aligning everyone before expensive development starts. You can put a prototype in front of ten potential users and learn where they get confused in an afternoon.
What a prototype can't do: prove people will *use* or *pay* for the product, because nothing actually works.
MVP: "Will people actually use it?"
An MVP (minimum viable product) is real, working software — the smallest version that delivers genuine value to real users. Unlike a prototype, it actually does the thing. Unlike a POC, it's built for the public, not the lab.
The MVP is the only one of the three that answers the question that decides your company's future: *will real people use this, and ideally pay for it?* You launch it, real users do real things, and you get evidence instead of opinions.
Which do you need first?
For most founders, the honest answer is: a prototype, then an MVP — and a POC only if there's real technical risk.
- Just need to sanity-check the idea and show people? Start with a prototype. It's the cheapest way to make the vision tangible and catch flow problems early.
- The core relies on something technically uncertain? Do a small POC first to de-risk it before investing in the full build.
- Ready to find out if people will actually use and pay? Build an MVP. This is where validation really happens.
A common and sensible path is prototype → (POC if needed) → MVP. The prototype aligns everyone and de-risks the design cheaply; the MVP proves the business.
The expensive mistake to avoid
The costly error goes both directions. Some founders spend $30,000 on a full MVP when a $2,000 prototype would have revealed the flow was wrong. Others show investors a Figma prototype and get asked "how many users are actually using it?" — a question only an MVP can answer.
Match the tool to the question you're actually trying to answer. If you're not sure which question you're on, that's exactly the conversation worth having before anyone builds anything.
Not sure which one your idea needs right now? Book a free call and we'll help you figure out the cheapest next step that actually moves you forward.