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Doctor Market Fit

Jeroen Coelen

Tactics and frameworks for PMFit & GTM by an ex-founder turned PhD

Platform
Substack
PricingFreemiumPublishesWeekly
Issues199Founded5 years agoLast Issue3 days ago
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Latest Issues

Sometimes I feel so stupid

I’m finishing my PhD—yes, really—this year. And I have no clear idea of what’s next. And I got stuck thinking about it. Then I realised, last week, I helped 3 people with similar issues, with contain the hidden solution for me.

A designer...

3 days ago
5

Measure Product-Market Fit with The PMF Scale

  • Many founders ask me: how do I validate PMF before going all in on a segment?

    • You don’t. It’s the other way around.

    • You validate PMF by going all in on a segment and getting easy, repeatable sales as a result, with happy custome...

10 days ago
6
2

Try my Doctor Market Fit Claude Skill

  • I fed my 250+ Substack posts to Claude

    • After some tweaking, it built a skill that can help your startup

      • Ask questions about your PMF or GTM

      • Get feedback on where to focus

      • Sanity check your priorities

    • Try it...

17 days ago
2
1

Most people don't buy from startups

Just answer this question: When was the last time you bought something from a startup? When you were truly among the first 10 to 100 customers? Hard to say, right?

You likely weren’t.

When you used Spotify or Google earlier than your fri...

24 days ago
9
2

The curse of the validation mindset

Somewhere at a university, a workshop room awaits a new cohort of founders. Post-its and pens are scattered on wheeled tables, with a bookshelf holding dozens of startup books forming the backdrop. Slowly, the ambitious entrepreneurs trickl...

a month ago
6
2

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    Mentored 1000+ founders. PhD on startups.

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