01I review your beachhead
Feedback on which segments are properly defined and which one need refinement.
A structured and focused approach to PMF. Weekly check-ins and a systematic GTM. Frameworks backed by my own PhD research.
Startups I worked with got into:







Jeroen Coelen
PhD on PMF
Mentored 350+ startups
MEET
Doctor Market Fit
I do prep to hit the ground running. Then we do three iterations on your GTM.
I review your deck, data and interviews first. Then a 2h kickoff: we kill side quests and pick the beachhead.
Weekly mentoring call + async DMs. I help to filter signals from noise, and adapt your plan on the go.
Your call: get a monthly mentoring subscription, or continue by yourself.
01Feedback on which segments are properly defined and which one need refinement.
02I analyse if your sales drivers such as JTBD and problems make sense, and highlight where improvement is needed.
03Clear feedback on whether your segmentation is complete, and if your messages highlight the right aspect of your product.
A random sample from the catalogue, anonymised for discretion.
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Next: patient intake
Before we do a Market Fit Sprint, I want to make sure it's the right thing for you.
Describe your symptoms
Answer a few quick questions (~60 seconds) so I understand your stage, traction and bottlenecks.
Free 30-minute diagnosis call
We schedule a 30-minute call to explore your symptoms together and dig into where and why your GTM is stalling.
Get immediate low-hanging fruit tips
You get actionable quick wins you can test immediately to fix early traction leaks. Like medicine off the shelf available.
Honest prognosis
I assess if the Market Fit Sprint is the right fit. About 50% of the time it's not — if so, I'll tell you honestly and point you in the right direction.
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FAQ
I launched my first business when I was 14, helping senior citizens with computer problems. Ran a modest (web)design agency during my studies. My first actual startup never exited the business plan writing phase. In the second startup, we built for 1.5 years and then launched, got 1500 downloads, and usage flatlined. We built something people didn't want, without a working revenue model.
Not right now.
Startups that don't have a lot of resources. These are bootstrapped startups, startups without external funding (FFF, angel, VC, or grant), and pre-revenue startups. I define pre-revenue as <€1000 MRR.
Early-stage startups. I see startups as a design object. I'm investigating how entrepreneurs design successful startups. And nope, our mentoring will not be part of our research—unless we specifically agree to that. My book is finished later this year. I'll post about on my Substack or LinkedIn.
No, I don't. You don't want me on your cap table for three months of work, trust me. Given the early-stage risk, the equity share I require to make it worthwhile to me is not in your favour. You may pay in tranches, and I offer discounts for pre-revenue, bootstrapped startups.