Co-Founder Partnership
You've got the audience. There's a product hiding in it.
I build the software your audience already needs — and we own it together. You bring the reach. I build and run it. Nothing upfront. 50/50.
Built with creators like Alex Welsh (Locksmithing Secrets) — now my co-founder on Keysolved.
The Proof
I've already done this — here's how it worked.
Alex Welsh teaches locksmithing to a 28k-strong audience. His students kept asking the same thing on every job: which key, which tool, for which car? The answer was scattered across forums, PDFs and WhatsApp groups.
So we built Keysolved — the reference app that answers it in seconds. I built it and run it. Alex brings his audience and is my co-founder. We split what it makes. Your audience has a version of that question. I find it, build it, and we own it together.
1 / 8Keysolved
The vehicle key reference, built for working locksmiths
21 days
Kickoff call to live product
7+
Countries with paying subscribers
$19/mo
Standard subscription
"For years I have wanted to do this and now it’s a reality so thank you. I’m really looking forward to promoting it and you have my word that I’ll be making this my main priority."
Alex Welsh
Co-founder, Keysolved · Founder, The Locksmith Mentor
How It Works
Simple, and weighted in your favour.
You bring
an engaged audience, a confirmed number of pre-orders, and the commitment to market the product to them — the same way I commit to building it.
I bring
the entire product: build, infrastructure, data, support, and the day-to-day running of it.
We split
revenue 50/50 after costs. Both of us see the Stripe dashboard. No equity games, no hidden fees.
You pay
no cash upfront. Your reach, and the pre-orders it brings in, are the investment.
We start trading through existing accounts, sign a simple heads of terms, and formalise properly once it's making real money — not before.
The Maths
Do the maths on your own audience.
A small slice of an engaged audience is a real monthly income. Drag your audience size and watch your half — after costs.
co-owned 50/50
700
Subscribers @ 2%
£5,985/mo
Your half
£5,985/mo
My half
Illustrative: 2% of your audience at £19/mo, after ~10% costs (hosting, payment fees, third-party services), split 50/50.
Turn your audience into a product — the 5-day playbook.
One short email a day: how the model works, the exact playbook behind Keysolved, and how to find the product hiding in your audience.
Free. One email a day for five days. Unsubscribe anytime.
Why Me
A product person, not an agency.
18 years building products — including leading product design at Habito, where the software I worked on processed £3B+ in mortgages* — and 100+ products shipped through Hello Crossman. I build production-grade software in ~30 days, not 30 weeks. You're not getting a freelancer or an offshore team; you're getting a co-founder who can actually ship.
£3B+
processed
100+
products shipped
~30 days
to production
*£3B+ processed at Habito on products I led the design of — not by Hello Crossman alone.
Is This You?
This works when:
You've got an engaged audience (a list, a channel, a community), not just a follower count.
Your audience hits the same painful task repeatedly — a lookup, a calculation, a piece of admin they all complain about.
You'll actually market it. This only works if you drive it.
You can turn interest into pre-orders. Partner builds are agreed on application, and normally need a confirmed number before the build starts.
If that's you, there's almost certainly a product hiding in your audience. The call is where we find it.
FAQ
The questions everyone asks.
Let's find the product in your audience.
One 15-minute call. I'll come having looked at your audience, with a view on what the product could be. No pitch deck, no obligation.
Go deeper on the model
How co-ownership works, why it beats a sponsorship, and what makes an audience product-ready.
The Product Hiding in Your Audience: How to Find the One Worth Building
There's usually a product hiding in your audience — the repeated, painful question they keep asking you. Here's how to find the one worth building, with KeySolved as the worked example.
Sponsorships vs Co-Ownership: The Real Maths of Monetising an Audience
A sponsor pays once; a co-owned product pays every month. Here's the real maths of monetising an audience — with honest conversion scenarios and a clear four-way comparison.
How We Built KeySolved: Turning a Locksmith Audience Into a Co-Owned SaaS in 21 Days
KeySolved went from a locksmith educator's idea to a live, billing SaaS in 21 days — co-owned 50/50, with paying subscribers across 7+ countries. Here's the full build story.