Sparring: 90 minutes with someone who's seen the movie, for a technical-business decision that weighs on you.
For founders, CTOs, and builders building with AI (Cursor, Replit, v0) who cross the technical-business intersection and need to navigate it. Not mentoring. Not consulting. It's a ring where you think without filter, and someone stops you when you're about to make an expensive mistake. Useful for validating a direction before committing, for someone to hit a plan, or for thinking out loud without being sold anything.
First time? Run the free D4S diagnostic → It's a prerequisite.
€150 for the first 5 clients. Then €250. Then €350. The price moves; the format doesn't.
Why pay for something the free tool above already does.
Fair question. Short answer: you're not paying for the framework — you're paying for its application to your specific case.
The free diagnostic gives you the structure: four filters, an AI-generated verdict in 30 seconds. Useful for a quick gut-check. What it doesn't give you: eight years of similar decisions, real math on your burn and your stack, the honesty of a human telling you "this won't work and here's why", or a written memo you can defend to someone who wasn't in the conversation.
It's the difference between a medical textbook (free) and a doctor looking at your specific symptom (paid). The textbook doesn't become less useful because the doctor exists — it's what gets you to the doctor.
What kind of decisions fit.
Any technical-business decision that weighs on you, at any altitude — a direction to validate, a plan that needs to be hit, or one you just need to think out loud. The height doesn't matter; what matters is it's a real decision with stakes, not ideation.
Strategic
"Should I kill this idea or keep building?"
Differentiation + Dollars
Infra / cloud
"Hetzner, OVH or AWS for my MVP?"
Dollars (50-70% cost gap) + Defense (compliance)
Pricing
"Subscription or one-time? What price in LatAm vs EU?"
Dollars + Differentiation
Make-or-buy
"Should I build this myself or pay for an API?"
Differentiation + Dollars
Stack
"Do I need cloud, or is a VPS enough for my first 1,000 users?"
Dollars + Defense
GTM
"Is my go-to-market plan realistic or am I lying to myself?"
Dollars + Differentiation
Operational
"Stripe, Lemon Squeezy or Paddle for LatAm + EU?"
Dollars + Defense (tax/compliance)
Pivot
"I've been building for 8 months and there's no traction. Pivot or stop?"
All four filters applied to the sunk cost fallacy
What happens in 90 minutes.
Before · free
D4S diagnostic
You run the diagnostic. We arrive at the session with the structure already filled in. We start at minute 1 with math, not "tell me what's happening".
Min 0–30
Context + math
I review what you brought, ask the three questions the AI couldn't, we put real numbers on the table.
Min 30–75
Pattern-matching
What happened when other teams faced the same decision. What sank them, what saved them. Applied to you, not in the abstract.
Min 75–90
Decision + memo
You leave with the decision made and a concrete move for the next 7 days. Within 24h you receive a one-page memo you can show your co-founder or board.
When this is NOT for you.
- If you have time to read 20 blog posts, build 5 spreadsheets, and consult 3 senior friends, you can reach the same place for free. This session saves you those 7–14 days of exploration, no more.
- If the decision has no real stakes (€10K+ in time or money on the line?), the free diagnostic is enough. Don't pay.
- If you're in pure ideation mode ("I had this idea about…"), it's not time yet. Come back when you have a specific decision: option A vs B, build vs no-build, pivot vs continue.
- If you want someone to tell you what you want to hear, that's not me. I'll tell you what I think, even if you don't like it.
- If the decision requires technical execution (writing the code for you, running the migration, doing the pre-sales) — that's not what I do. I'll send you contacts who do.
Five spots at founder rate. After that, the price goes up.
€150 for the first 5 clients. €250 after. €350 once validated. The price goes up; the format doesn't — always 90 minutes, always with a memo, always with the D4S diagnostic as prerequisite.
Or run the free D4S diagnostic first · [email protected]
Bringing a team, not an individual decision? Book a discovery call — Boring Room or Facilitation Program, depending on your case.