The Short Answer
A proof of concept tests whether the technology works. It runs in days and answers one question: can AI do this task reliably enough on your data. An MVP tests whether the business value is real. It runs in weeks and puts a working slice in front of users. Start with the POC when the risk is technical, the MVP when the risk is adoption.
What a proof of concept actually tests
A POC has one job: prove the technology can do the task on your data. Not on a benchmark. Not in a polished demo video. On the messy, real inputs your business actually sees.
Concretely, a POC answers questions like these. Can the model extract the right fields from our documents when they are scanned, rotated, and inconsistent? Can retrieval find the correct policy clause when the question is phrased the way a real customer phrases it? Does accuracy hold on the edge cases that make this problem hard, or only on the clean examples someone hand-picked?
A POC is small on purpose. No login. No dashboard. No integration with your systems. Often it is a script and a set of test cases. The output is not a product. It is evidence. At the end you know whether the core capability is real, roughly how accurate it is, and where it breaks. That is worth a great deal, and it takes days, not months.
What an MVP actually tests
An MVP assumes the technology works and asks a different question: will people use this, and does it move a number the business cares about?
That means an MVP is a real, if narrow, product. It has a way in for users, it connects to at least one real system, and it handles the unhappy paths: bad input, no result, a model that is unsure. You put it in front of actual users, or a controlled subset of them, and you watch what happens. Do they adopt it? Does it cut handling time? Does it lift a conversion rate? Does support volume drop?
An MVP takes weeks because most of that work is not the model. It is the plumbing around the model: auth, data access, error handling, logging, and an interface a human trusts enough to rely on. The model might be 20% of the effort. The other 80% is what makes it usable.
The difference in one line
A POC de-risks "can it work." An MVP de-risks "is it worth it." They answer different questions, in different timeframes, for different audiences. A POC is for you and your technical team. An MVP is for your users and your P&L.
How to tell which one you need first
Ask what you are actually unsure about.
If the uncertainty is technical, start with a POC. You are not sure the accuracy is achievable. You have never run your real data through a model. Someone on the team is skeptical it can be done at all. A POC settles that in days, for a fraction of the cost of finding out the hard way three months into a build.
If the uncertainty is about value or adoption, and you are already confident the technology works, go to an MVP. Maybe you have seen this capability proven elsewhere, or it is a well-trodden use case. The open question is whether your users will actually use it and whether it moves the metric. A POC there just delays the real test.
Most teams we talk to are in the first group and think they are in the second. They are ready to fund a full build on the assumption that the AI part is solved, when the AI part on their specific data is exactly the thing nobody has verified.
Why starting with the wrong one wastes a quarter
There are two failure modes here, and both are expensive.
Skipping the POC: you commission a full MVP, spend six to ten weeks building the product around the model, and only then discover the model cannot hit the accuracy the workflow needs on your data. Now you have paid for auth, UI, and integrations wrapped around a core that does not work. The build was not wrong. The sequencing was. A two-week POC would have caught it before any of that spend.
Over-investing in the POC: the opposite trap. The technology clearly works, but instead of shipping a thin MVP to real users, the team keeps polishing the prototype, adding models and edge cases nobody asked for. Months pass with no user ever touching it. The market question stays unanswered because you kept re-answering the technical one.
Either way you lose a quarter. Ninety days is enough to test both questions in the right order. It is not enough to test the wrong one and start over.
The order that works
For most AI projects with real technical risk, the sequence is simple. Run a POC in days to confirm the capability on your data. If the evidence is good, build a narrow MVP over the following weeks and put it in front of users. If the POC evidence is bad, you have saved a full build, and you can redesign the approach or walk away, having spent days instead of a quarter.
The POC is not a throwaway when it is built right. The evaluation set you create to measure it, the real test cases, the accuracy baseline, all of it carries straight into the MVP and becomes how you keep the product honest in production.
How we run a POC in days
We have shipped 7 production AI systems across 5 industries, with more than $1M in documented ROI, so we know the difference between a demo that impresses in a meeting and a system that holds up under real traffic. A POC with us is scoped to answer one question fast. We take your real data and your hardest cases, run them through the approach, and come back with an accuracy baseline and an honest read on where it breaks.
Some of what started this way is now in production: 100% call QA coverage where manual review had only ever reached under 5%, insurance denial appeals cut from 30-60 minutes to under 2 minutes, and a plain-English cybersecurity query engine that has run for more than six months with zero bad queries. In each case the POC told us the core would hold before anyone funded the full build.
Get a Free Technical Assessment
If you are weighing an AI project and are not sure whether you need a proof of concept or an MVP first, we offer a free technical assessment. It is a 30-minute call about your use case, followed by a written roadmap within 48 hours that names the real risk, recommends POC or MVP, and lays out timeline and cost. There is no obligation, and the roadmap is yours to keep. Book at sasid.ai.