Marcel Hagedoorn

Hi all, I'm Marcel. Product maker. Entrepreneur. World Traveler. Founder of Mindwave.

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After losing $38676+ as an Indie Hacker. I can't do it anymore. I quit.

Do you have experience with Cognitive Behavioral Therapy (CBT)? Try my product!

Ran a Trial offer for 10 weeks. Here's what I found.

How did you validate demand for Slack apps?

Who else is building Slack Apps? Let's chat here

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