When an investor asks how your product will scale, the answer depends on what is happening underneath the screens. A working prototype can hide an application that slows down as usage grows, or a codebase where adding a feature breaks something that already works. Those are architecture and product decisions, and a convincing demo won't tell you whether they've been made well.
We work through those decisions with founders before they put more money into the product. We look at what the application needs to support as it grows and whether its foundation is set up to get it there. A pitch deck can describe the growth plan. Our work starts with whether the architecture can support it.
The best example I have is a half baked prototype we rescued. It had to unlock something physical in a room it didn't control, then know whether that actually happened. The prototype had no answer for how the product would know, in real time, what was happening on that hardware, or what it would do in the gap before it found out. Nothing split the application into different buckets so one busy piece didn't drag the rest down. That's what it came down to. You wouldn't have found any of it by reading the code, and you can't see any of it from the screen.
That speaks to the founder not knowing what they don't know, right? They can't know that Software A is better than Software B for their specific situation, or that one can be more agile than the other. I covered why a founder can't see this from inside the prototype in You Can Build the Wrong Thing Faster Than Ever.
"I've got the foundation. Why would I keep paying you?"
If a founder has a solid foundation under them and doesn't have seed investment yet, they can absolutely start pushing feedback or response from the people they pitch to in order to secure that next round. Small changes, feedback, QA stuff. We built the foundation, the agents can build using our standard, and that's true of any good foundation, not only ours. If you built it yourself and every new feature breaks the last one, you don't have a foundation yet. You have a prototype that's telling you what it's missing.
That said I don't think vibe coding more features without product strategy help is smart. I'll clarify. Any new feature should get careful consideration first, and I'll say what that means in a minute. Otherwise you end up bolting on way too much. Especially with AI.
Vibe coding will take what it thinks you need and build it extremely defensively. Ask an agent for any feature and it'll write ten brittle tests that check whether a title exists. That's code bloat. Change the title and the test fails, so the agent changes the test, or worse, stacks a new test on top of the old one. Agents stray into other areas you may not have asked them to. They rewrite utility functions that already exist somewhere else in the codebase. They'd rather write net new code than update a function into a better, more usable state across the whole thing. If you don't know what you're looking at, you'll just be saying yes to everything, and you end up with way more product than you needed to get to the next round. And that may lead to more refactoring down the line. The next-dollar test we wrote about in August still applies, and once the check lands it's the investor's dollar.
You can't just hire a team and run
The other version of that question comes after the check. Why not just raise and hire a team?
Our goal has always been to partner with people to the point where they can hire an internal team and grow themselves. But getting to your proof of concept, or your first stage of investment, isn't the end of that road. You can't then just hire a team and run. Who vets the engineers? Who's doing the work your investors expect during all of that? Someone has to work with the new hires to set standards and process, and someone has to keep iterating, asking questions, pushing back, and making sure the feature is built right and forward thinking while balancing design and UX. Just because you have the foundation doesn't mean you don't need someone to help frame the walls, do the plumbing, the electrical, landscaping, etc...
That doesn't always mean us, and it doesn't always mean an engineer. If what you need is someone in the room speaking to the technology, talking to your stakeholders, building the more business-focused documentation that helps you raise, that's a fractional CTO. We do that too. So do plenty of other people. You hire your first engineer when you have standards, a roadmap, clear direction, communication with your stakeholders and users, a solid UX plan, and momentum. Not during your first raise. A lot of startups run into money trouble because they hired too early. When you have those things, hire the engineer. That's the point where we're supposed to be done.
If you want the decisions written down, the brief at the end of a Product Inception records what needs to be true of the architecture for the growth story to hold, and which features got a yes and why. The brief sits alongside your pitch materials, documenting the technical work needed to support that growth.
So here's the posture I'd take, whether or not you ever talk to us. Tweaks, pitch feedback, and QA can be vibe coded until OpenAI changes their pricing model on you. Anything new gets careful consideration around what should be built, what should not be built, what the feature really is, and what problem it's solving. If you can answer those, build it. If you're guessing at one, that's a structural or product-defining call, and making it without a product development partner in the loop is how you end up with more refactoring and way higher cost in the future.