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Doctor Market Fit

Jeroen Coelen

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

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Substack
PricingFreemiumPublishesWeekly
Issues191Founded5 years agoLast Issue7 days ago
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Latest Issues

How I went from zero outbound to 28% reply rate on LinkedIn

  • Over the past few months, outreach guru Prateek has helped me improve my outbound

    • I went from zero outbound to 28% reply rate on LinkedIn

    • And 13% of them book a call with me.

    • Here’s what Prateek taught me

I’m not kiddin...

7 days ago
3

Measuring customer-problem fit

One simple framework today:

Many founders struggle to identify which people actually have high problem urgency or high customer-problem fit.

Doctor Market Fit is a reader-supported publication. To receive new posts and support my work, co...

15 days ago
7

The 17th century bubble that foreshadows AI's fate?

Like many people, I had heard of the tulip mania: how 17th-century traders literally swapped bulbs for an Amsterdam canal house. But I never understood why people would pay so much for just a flower bulb. Is it simply supply and demand? Or...

21 days ago
6
1

Dear founders, please stop saying "Based on science"

Dear founders, please stop saying "Based on actual science" just because you found a paper from 2014 that vaguely talks about something your app does.

What do you think will happen?

You: "It's based on science!" 🥴

Customer: "Oh, good...

a month ago
3

Why referral marketing often is a bad idea

  • I see many very early-stage startups set up a referral program.

    • They have a dozen paying customers—or a couple hundred if it’s B2C.

    • Spend 4 weeks building a referral system.

    • It flops.

I never understand it; the logic...

a month ago
6

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  • Jeroen Coelen

    Mentored 1000+ founders. PhD on startups.

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