What is a proof of concept?

A proof of concept (POC) is a technical demonstration that a specific approach can work. It answers the question: can we build this? A POC does not need to be maintainable, scalable, or user-facing. It is an internal engineering artifact that validates technical feasibility before committing to an implementation approach. POCs are often thrown away after the feasibility question is answered.

A prototype is a representation of a product experience, created to communicate what the product will feel like before it is built. High-fidelity prototypes in Figma or Framer can be indistinguishable from the real product in screenshots but have no functional backend. Low-fidelity prototypes are wireframes or paper sketches. Prototypes are for design validation and stakeholder communication, not for user acquisition or business hypothesis testing.

What distinguishes an MVP from a prototype?

An MVP is a real product with real users and real data. A prototype can look like a product but is not backed by a functional system. An MVP is deployed and accessible to real users who use it for real purposes. The distinction matters because a prototype validates design; an MVP validates whether real users will adopt and pay for the product at the proposed value proposition.

When should you build a proof of concept before an MVP?

When the technical approach is novel or uncertain enough that you do not know if the core functionality can be built within acceptable constraints. A POC is appropriate if you are building an AI feature on a model you have not used in production, integrating with a hardware device through an untested SDK, or implementing an algorithm whose performance at scale is uncertain. Once the technical feasibility is confirmed, move to MVP.

Can a prototype replace an MVP for early validation?

A clickable prototype can validate user experience design and basic user workflow before an MVP is built. It cannot validate whether users will adopt the product in their real workflow over time, whether they will pay for it, or whether the value proposition is compelling enough to produce referrals. Prototype validation is faster and cheaper; MVP validation is more accurate for business hypothesis testing.

MVP Development and Startup BuildsMay 23, 20266 min read

MVP vs Prototype vs Proof of Concept: Stop Confusing Them

A proof of concept demonstrates that a technical approach is feasible. A prototype demonstrates what a user experience could feel like. An MVP is a product with real functionality released to real users to test whether a business hypothesis is correct. Confusing them leads to investing prototype effort in a proof of concept, shipping a prototype when an MVP is needed, or over-engineering an MVP to enterprise-product standards when a prototype would generate the same learning.

Written by Yashveer Singh, founder of Yashveer Labs.

What you need to know

A proof of concept answers "can we build this technically?" A prototype answers "does this experience feel right?" An MVP answers "will real users adopt and pay for this?"
POCs are typically internal engineering artifacts that are thrown away. Prototypes are design communication tools. MVPs are the first deployable version of a real product.
The mistake of treating a prototype as an MVP leads to shipping a product with no backend, no data persistence, and no real user accounts to "real users", producing fake signals about product adoption.
The mistake of treating an MVP as if it needs to be production-grade leads to over-engineering, delayed launch, and the same learning gap that a simpler version would have generated months earlier.
The right level of investment depends on what question is being answered. Match the artifact to the question, not to the founder's comfort level with the level of commitment each represents.

The core argument

The terminology confusion has real consequences. A founder who calls a Figma prototype an MVP and invites a hundred users to test it will generate feedback about the design and user flow, not about whether the product is something they would actually use in their workflow and pay for. That feedback is valuable but is prototype feedback, not MVP feedback. The same founder who treats that prototype testing as "MVP validation" and concludes the product is validated has made a measurement error that often leads to investing in building the wrong thing.

The proof of concept confusion causes a different failure. An engineering team asked to build an MVP for a technically novel feature, an AI recommendation engine, a real-time synchronization system, a computer vision classifier, may spend weeks exploring the technical approach before understanding whether the core algorithm is feasible. That exploration is a proof of concept, not an MVP. Calling it MVP work creates the perception that business validation is happening when technical feasibility is still uncertain. The correct sequence is: POC to confirm feasibility, then MVP to test the business hypothesis with real users.

The practical rule is: match the artifact to the question. Uncertainty about technical feasibility justifies a POC. Uncertainty about whether the user experience is correct justifies a prototype. Uncertainty about whether real users will adopt and pay for the product justifies an MVP. These are different uncertainties with different costs to resolve, and using the right tool for each produces accurate information at the right cost.

Common mistakes

Investing MVP engineering effort in what is actually a prototype. A fully deployed system with user authentication, a database, and error handling built to validate a design decision that could have been tested with Figma represents wasted engineering investment.

Shipping a prototype to real users as if it were an MVP. Real users with fake products become frustrated when the product does not persist data, when other users cannot see their work, or when the functionality implied by the design does not exist. Prototype feedback from users who expected an MVP is not useful feedback.

Skipping the POC for technically uncertain features. Committing to building a feature without confirming technical feasibility creates the risk of investing weeks in an approach that cannot work, discovering the limitation mid-development. Run a focused POC first.

Requiring MVP-level code quality for a POC. A POC is a throw-away investigation. Code that is clean, tested, and maintainable is waste in a POC. The goal is to answer a technical question as fast as possible.

Not defining which type of artifact is being built before starting. Teams that do not align on whether they are building a POC, a prototype, or an MVP apply different effort levels and produce artifacts that do not match the purpose. Define it before starting.

Where to start

Identify the primary uncertainty you are trying to resolve. Is it technical feasibility, user experience design, or product-market fit? The answer determines which artifact is appropriate.

Write a one-sentence definition of done for the artifact. A POC is done when the technical question is answered. A prototype is done when the design is validated with users. An MVP is done when it is live with real users and generating adoption data.

Review previous work to categorize what was actually built. If the team has previously built something called an MVP, evaluate whether it was actually a POC or prototype by the definitions above. Understanding past work with clearer vocabulary prevents the same categorization errors in future projects.

Frequently asked

Author

My approach to this kind of work

I approach this kind of work the way I would want someone to approach a system I depended on. With care, with rigor, with a sense that the next person who touches it should be able to understand it without my help. Yashveer Singh, founder of Yashveer Labs. That is the standard. If it is the standard you are looking for, I am the engineer to hire.

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MVP vs Prototype vs Proof of Concept: Stop Confusing Them

What you need to know

The core argument

Common mistakes

Where to start

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Frequently asked

My approach to this kind of work

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