Reletter
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Helping business leaders become better AI operators

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Substack
PricingOnly free issuesPublishesWeekly
Issues101Foundeda year agoLast Issue26 hours ago
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Latest Issues

Technology comes last. Fix these 5 things first.

You built something real.

The product works. Customers renew. Revenue crossed €20 million — maybe €200 million — years ago, and you got there without a consulting deck or a venture round.

You won on judgment, hustle, and a product people...

26 hours ago
14
1

AI-first is API-first

What makes software worth buying in the agentic era?

On a client call last week, I heard myself making the same case I’ve been making since April: AI-first is API-first.

The obvious reading — pick the tools with the best AI — is exactly...

8 days ago
32
8

There are only 5 things people will pay a premium for

There is this concept in marketing that has intrigued me since my days as a marketing graduate student: brand equity.

It’s the financial approximation of how much a brand is worth.

To give an example, the world’s most valuable brand accor...

15 days ago
33
16

Reflections on Solopreneurship in 2026

7 years — that’s how long I’ve been operating as a solopreneur.

Est. 2019, when I trained my first transformer model for a mobile chatbot.

Last week, I entered employment for the first time in seven years.

For context: in the Netherla...

22 days ago
33
16

How to Build Your First AI Sales Engine

Hey all!

This week a short post to share the recording of a Substack Live I did last week with the great and from and .

The recording is a walkthrough of the sales engine I wrote about back in April:

Enjoy!

PS Interested in buildin...

a month ago
26
2

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Authors

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  • Jonas Braadbaart

    Helping business leaders become better AI operators. AI architect and CTO with 10+ years of experience designing, building and delivering AI solutions.

  • Wyndo

    AI Operator & Maker \ud83d\udee0️ || Sharing optimistic view how to build smarter, work faster, and live better—with AI || Building in Public || Vibe-coder

  • John Brewton

    WE ARE ALL BECOMING COMPANIES. I help you build yours. Built a company to +$75M and sold it. Built audience of +50,000 so far…Harvard economics nerd writing about the future of operating companies.

  • Dheeraj Sharma

    I help non-technical founders and creators build AI systems that grow revenue without growing workload. 20 years of enterprise engineering, now in plain English. I share just what works.

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