See if your idea fits
For founders with an idea for an app or a platform
We turn it into a real, working version of your app or platform in days — one you can click through and show off. Not a generic AI demo investors see straight through. Not a $45,000 agency quote. The real thing, for a fraction of the price.
Watch this first
A couple of minutes — see exactly what you get, and what to expect.
Verified recommendation · LinkedIn
Ready when you are
Three ways to get it built
Tap any row to see why it matters.
Swipe to compare →
| Build it yourselfAI builders — Lovable, Bubble | The standard processTraditional software agency | OneChairPowered by OneSparkBest fit | |
|---|---|---|---|
| What you end up with | ✕A generic demo that breaks at scale | ~A finished build — eventually | ✓A real, working version you click through |
Why it matters Investors and partners can tell a real, working build from a templated demo in seconds. One opens doors; the other gets a polite no. | |||
| Timeline | ~Hours, then weeks of fixing | ✕3–8 months | ✓Days |
Why it matters Momentum matters. An idea that takes eight months to see is an idea that loses its window — and your nerve. | |||
| What it costs you | ~Cheap up front — paid back in your time & rebuilds | ✕$45,000+ | ✓A fraction of agency cost |
Why it matters You shouldn't pay agency money just to find out whether the idea works. Prove it first, spend big later. | |||
| Who does the building | ✕You become the developer | ~You manage a team | ✓We handle everything |
Why it matters You're the domain expert, not the developer. Your time is worth more on the business than fighting a codebase. | |||
| Need a technical co-founder? | ✕Practically, yes | ✓No | ✓No |
Why it matters Giving away half your company to a stranger who can code is a steep price for getting started. You don't have to. | |||
| Will investors take it seriously? | ✕No — they see right through it | ✓Yes, eventually | ✓Yes — in days |
Why it matters A working version you can hand over is the difference between "interesting idea" and "where do I sign?" | |||
| On-time guarantee | ✕None | ✕Rarely — you absorb the delay | ✓On time, or it's free |
Why it matters Miss the delivery date by even a day and you get every dollar back — and you keep the prototype. The deadline risk is ours, not yours. | |||
| Code you own & can scale | ✕Platform-locked, brittle | ~Varies by team | ✓Clean, documented, fully yours |
Why it matters Code you own and can hand to any engineer means no lock-in, no forced rebuild, no hostage situation later. | |||
The only column without a compromise — OneChair, 8 / 8
The process
Plain English. No spec, no jargon, no tech knowledge.
A real, working version of your app or platform, live on a private link.
Put it in front of investors, partners and your team — and watch them lean in.
Keep the code, plus a roadmap to the full build. Continue with us only if you choose to.
Why it's days, not months
In a traditional build, every stage waits for the one before it. That waiting is the timeline. OneSpark removes the queues.
Each step waits for the last. The waiting between them is where the months go.
85+ specialised agents working at the same time — no step waiting on another.
It's the same enterprise process our CTO ran for Fortune 1000 companies across 20 years — just without the queues. That's why it's fast, and why it holds up.
What you walk away with
Built from your idea — clickable, testable, yours to show anyone. Not a mockup.
One call to walk us through it. Days later you're clicking through it.
Properly engineered — the kind of build that makes investors take you seriously.
You bring the idea. We do the building. You own every line — no lock-in.
Every one of these is a real, working build — most delivered in hours, not months.
Healthcare, SaaS, travel, aviation, education — if you can describe it, we can build a working version of it.
See if your idea fitsFounders have used builds like these to pull in investors and bring on co-founders — off the strength of seeing the idea actually work.
Don't take our word for it
"I'm blown away. It looks like two months of coding went into this. We now know our idea has merit, we've got an asset to show investors — and we found our development partner."
"In a few days my idea came alive. I've used the prototype to run user testing, form our founding team and generate investor interest. It created real momentum for Homebaked."
"That is literally my platform. After trying it, I realised how much faster I could test and roll out features. Having a way to build and validate quickly is a total game-changer."
Active users grew 400% in the first quarter after launch.
"You can get to product-market fit in 1/10th of the time. The speed and the ability to push features — that's the biggest benefit."
A cell & gene therapy platform — live in 30 hours, with an 8-month ROI.
"I've never seen a company so dedicated and capable. I was amazed at the quality and speed of the working product they delivered."
Complex compliance requirements — delivered on time and on budget.
University-wide asset tracking with QR & live maps — fully documented, on budget.
Prototypes shipped in 5 days
Teams we've built for
We only take a few builds at a time
Tell us about your app or platform. If it's worth building, you'll see a real, working version in days. If it's not, we'll tell you straight — no pitch, no pressure.
See if your idea fits Free · 20 minutes · An honest answer either way.