Well, it’s not just a good idea.
Investors who've funded hardware before are looking for evidence of a real problem people will pay to solve, a prototype that proves function rather than just looks the part, unit economics that hold up at real production volume, and a manufacturing plan that isn't just a hope.
Get those four things right and the pitch does most of the work itself.
Here's what's actually behind each of them.
Is this solving a problem people actually have, or one you find interesting
This comes before manufacturability, before unit economics, before any of it. If the problem isn't real, none of the rest matters and "real" has a specific meaning here: not just a problem that exists, but one that's frequent, painful, or costly enough that people are actually willing to pay to make it go away.
This is where a lot of founders skip a step. It's easy to fall in love with a solution and work backwards to convince yourself the problem is bigger than it is. The way to actually check is to go and talk to the people who'd supposedly have this problem, to ask about their day-to-day without mentioning your idea at all. How do they currently deal with this? How often does it come up? What have they already tried? What are they currently paying, in money or time or hassle, to work around it? If they can't describe the problem in their own words without you prompting them, or if their current workaround is genuinely fine for them, that's worth knowing before you spend a year and a design budget on it.
Willingness to pay is the sharper test, and it's different from interest. Someone telling you "I'd definitely buy that" costs them nothing to say. What actually counts is behaviour that costs them something, a pre-order, a deposit, a signed letter of intent, a waitlist people had to actively sign up for rather than a form nobody filled in, a pilot customer willing to commit time to trial it. Investors know the difference between polite enthusiasm and real commitment, and they'll ask for the second one, not the first.
A working prototype isn't proof it's fundable
Getting something to work once, on a bench, with hand-picked components, is roughly 20% of the journey to a fundable, manufacturable product. The other 80% is proving it can be built repeatably, sourced reliably, tested, certified, and delivered at the volumes the business plan needs and that's the part a lot of first-time hardware founders haven't done yet when they start pitching.
Worth knowing the difference between the two types of prototype investors will ask about.
A "looks-like" prototype shows form; size, shape, how it feels to hold.
A "works-like" prototype shows function; whether the actual mechanism or electronics do what's claimed, often built roughly and not worrying about finish.
Some founders lean too hard on the first one, because a polished-looking demo is what impresses in a room. Experienced hardware investors know that trick and see straight through it, a beautiful shell with nothing proven inside is a bigger red flag than an ugly prototype that clearly works. Being upfront about which stage your prototype is actually at is a better signal than pretending it's further along than it is.
Unit economics have to work at real volume, not just on a slide
Know your bill of materials cost, your target retail price, and your gross margin and be able to talk through all three without hesitating. This is one of the most common places hardware pitches fall down, not because founders haven't thought about it, but because they've thought about it using the wrong numbers.
A common mistake: pricing the BOM based on what components cost in prototype quantities, then presenting that as the production cost. Component pricing drops meaningfully at volume, but so do a lot of other things founders forget to model, tooling costs amortised over a production run, fixed costs like certification fees, negotiation leverage with suppliers once you're a real customer rather than a one-off buyer. Investors want to see the maths done properly at the volume the business plan actually needs, not the volume that makes the prototype look affordable.
Manufacturability, can this actually be built repeatably, not just once
This is where a lot of otherwise promising pitches lose credibility, because it's the part founders without a manufacturing background genuinely don't know to check.
Single-source components are the classic trap, a part that's available in small quantities from one supplier for prototyping, but has a long lead time, limited stock, or a real risk of going end-of-life right as you try to scale. It happens more often than people expect, and it's the kind of thing that quietly derails a production run months after a design was signed off. Investors who've funded hardware before will ask about this directly: what's your BOM risk look like, and do you have alternates for the parts that could bite you?
This is design-for-manufacture territory, and it's worth taking seriously early rather than discovering it during due diligence or worse, during your first production run.
Do you have a real manufacturing plan, or just a hope
A named manufacturing partner, or a shortlist of contract manufacturers you're actually in conversation with, is worth more to an investor than a polished slide about "scaling to 10,000 units." Vague plans read as inexperience.
Timelines matter here too. Claiming you'll go from prototype to market in under a year, with no manufacturing relationships or supply chain in place yet, doesn't read as ambition to an experienced hardware investor, it reads as not having done this before. Build in buffer for prototype iterations and tooling revisions, because there will be iterations, and a realistic roadmap you beat is a far better position to be in than an unrealistic one you miss.
What actually makes it hard to copy
Every hardware pitch eventually runs into the unspoken question: what stops someone else, probably with more money, from just making this too. A clever mechanism alone rarely holds up as an answer, because most mechanisms can be reverse-engineered or worked around given enough time and budget, which bigger competitors usually have.
The stronger, more durable answer is usually the relationship between the product and what it means to the people who buy it, the brand meaning, the trust, the reason someone chooses this specific product over a near-identical one at a lower price. We think of this as Product-Brand Fusion TM: the product and the brand built around it becoming difficult to separate, so that copying the mechanism doesn't get a competitor very far, because they haven't earned the reason people actually buy it. It's a much harder thing to answer in a pitch deck than "we have a patent," but it's usually the more honest one and it's the kind of answer that tells an investor you understand what you're actually building a moat out of
The pattern behind all of this
None of these things are really separate checkboxes. They're all versions of the same underlying question an investor is asking: do you understand this business as well as you understand the product?
Founders who've spent months obsessing over the mechanism sometimes haven't spent the same energy on whether anyone's actually going to buy it, or whether it can be built twice, let alone ten thousand times.
The founders who come across well aren't the ones with every answer polished. They're the ones who've clearly done the thinking, who know where their BOM risk sits, who can say honestly whether their prototype works or just looks like it does, who've talked to real users rather than assumed they know what they want. That kind of groundedness is very hard to fake in a pitch meeting, and it's usually the thing that gets a second meeting booked.
If you're at the point of pulling a pitch together and some of these questions don't have confident answers yet, that's normal, it's also usually a sign of exactly where to spend the next few weeks before you're in the room.
Flynn is an award-winning product design consultancy working with startup founders and emerging brands to bring physical products to market, from first concept through to design for manufacture. If you have an idea you'd like to explore, get in touch.
We provide businesses with product design consultancy, industrial design, prototype design & related services.