Calvin O’Callaghan is a three-time founder with two exits, five years at HubSpot and a process-engineering background. FounderProof exists because Centralise, the business he was scaling at the time, still ran through him — and because the fix turned out to be engineering, not heroics.
Calvin trained as a process engineer at UCC, on a dual scholarship in Sport and in Innovation & Entrepreneurship. His first business, SmartRoutes, won the InterTradeIreland Seedcorn award and partnered with TomTom. His second, Centralise, became the fastest-growing HubSpot partner in the ecosystem’s history — ranked 19th of more than 6,000 agencies worldwide within 18 months, at a £3m run-rate with a team of twenty and no outside funding.
In between, five years at HubSpot, where in 2021 he was the highest-revenue individual salesperson in the company’s history — four President’s Clubs and two Founder’s Clubs, letters on request. Across those years and the Centralise years he worked with more than 140 businesses on their CRM and revenue operations: selling it, building it, fixing it and reporting on it.
Centralise is the proof of the method. It grew from around £40,000 a month to £260,000 a month with a team of twenty and no outside money — and in December 2025 Calvin took the whole month off. Nothing broke. Then he sold his shareholding to his co-founder, who runs it today.
The pattern was the same everywhere, including at his own companies: profitable businesses where the customer journey — first enquiry to long-term customer — depended on one person. So he went back to the tools he had trained on. Value stream mapping. Standardisation. Kanban. Applied not to a factory floor, but to the sales, service and delivery teams nobody had ever engineered.
The fix was never a heroic founder. It was a business that runs at 80% the same way every time — and then gets better.
Every line below is documented. Ask for the paperwork and you will get it.
3x founder, five years at HubSpot, trained as a process engineer. In the room and in your systems for every engagement — the Assessment, every read-out, and the Blueprint. Writing FounderProof: The 8 Pillars of a Business That Runs Without You, out January 2027.
Before FounderProof: co-founded and scaled Centralise to Elite HubSpot Partner status — ranked 19th of more than 6,000 agencies worldwide within 18 months — and, at HubSpot, was the highest-revenue individual salesperson in the company’s history in 2021.
A hard cap with a waitlist. Depth over volume; the founder in every room.
The first meeting is face to face, and the first two days of the Diagnostic are on site, anywhere in the UK and Ireland.
The person who has been asked to fix it gets the same seat at the table as the person who owns it.
Customer records stay in your systems. AI tools are used on our own methodology and anonymised extracts, never your customer data, and a data-processing agreement is signed before any access.
Outside consultants are used solely to challenge how we work — never to deliver it under our name.
One percent of revenue goes to good causes, alongside free consulting for businesses that cannot afford the full service.
Some sessions bring in a specialist chosen for the subject — on the business model, on the founder’s own operating rhythm. Sourced for the room, not for the brochure. Calvin also speaks to peer groups of fifteen to twenty founders and leaders; ask.
Productivity, cost saved or revenue increased. If a piece of work cannot be traced to one of them, we do not do it.
A weekly cash check, a monthly review with an outside adviser, a monthly board day, and every quarter an external consultant scoring the practice on five things: values, enjoyment, risk, customers, life. Ask to see the scorecard.
Technology and AI are the 20%. The diagnostic, the standard and the change management are the 80% — which is why we lead with them.
Every client, hire and decision is tested against that sentence before anything else. The longer ambition is to eliminate single points of failure in SMEs, one business at a time — and to build the evidence base for why they scale or fail.
Starts where most advice stops — after a paying customer exists — and gives founders and leaders a way to score their own business before they call anyone.
“Before you think about attacking, you must first ensure your own king is safe.”
The book scores a business across eight pillars and closes with why SMEs actually fail — public failure data mapped pillar by pillar. The consulting practice works from the six areas on the Method page, which are the same ground folded for a three-month engagement: Economics sits inside Business Model, People inside Governance, and the Customer Journey and Sales pillars are where the fifty signals live.
Calvin speaks to peer groups, co-working spaces and networking groups of fifteen to twenty founders and leaders in the UK and Ireland — the size of room where someone says what is actually going on in their business. No fee for a good room; no slides for the sake of slides.
How revenue leaks out of a customer journey nobody has mapped — and how to put a number on yours in a fortnight.
Performance, Running, Worth: why a profitable business can still be worth less than its numbers, and the work that fixes it whether or not you ever sell.
Why the software is the 20%, what the 80% actually is, and how to lead a change your team keeps.
FounderProof is the advisory. Alongside it sits a holding company that will acquire founder-led businesses and run them the FounderProof way.
Founder-led businesses in technology and digital services at £250k–£1m EBITDA, where the founder wants out and the business deserves to outlive them.
Each company led by its own CEO, on the same operating standard the advisory installs — with FounderProof alumni offered the leadership roles as a rite of passage.
We are not advising from the sidelines: everything we recommend is what we would do with our own money. And a line we hold: we do not bid for a client’s business while we are engaged or for three years after, and we do not recruit client staff.
Take the free self-assessment or book a call. Either way, a written view and a straight answer before you are asked for anything.
We show you where revenue is being lost and help you fix it. A process-engineering practice for founder- and leader-led businesses in the UK and Ireland at £5–20m revenue: the customer journey mapped from first enquiry to long-term customer, then process, HubSpot and AI to make it run without relying on any single point of failure.