Your sparring partner on speed dial
Weekly check-ins and unlimited DMs keep you on track to product-market fit

Additional brain
"Jeroen is an additional brain. Someone who shares your ambitions, has relevant experience and knowledge, and can provide support at a deeply personal level"
Julia
Founder of Badge
Now doing sales calls confidently
"I needed a structured approach to scale my sales calls and tactics for smoother conversations. With Jeroen’s input, I walked into those meetings feeling more confident than ever."
Philipp
Founder of Rollouter
Actionable advice with relevant examples
10/10 would recommend. Jeroen helped me get better focus on what's the most important priority. Asks the right questions to dive deep and gives very actionable advice with real examples based on the many startups he worked with.
Jayson
Designer at Marvel
Sanity checks and action points
Jeroen is the best! Helpful insights and sanity checks. Walked away with action points we are excited to execute on. Would recommend for any founder.
Eric
Founder of Ailixr
Mindset shift to the customer
"He helped me to shift my mind away from what I offer to focus on the customer. From supply to demand. This has helped me to sharpen my value proposition immensely"
Dylan
Founder of Bildung Academy
Hard and honest feedback
"Jeroen doesn't beat around the bush. He highlighted what customer information I missed in a direct way, I immediately knew where to focus. That's the kind of feedback I prefer to hear, cold and early."
Javier
Founder of Nummary
Learn to think like a startup
"By working with Jeroen, I've learned how to turn big ideas into small experiments. This increased momentum and focus for our startup. We now know what works, without spending 6 months of building it."
Caroline
Founder of Grape Genius
Have received my advice
Felt my energy
Accelerator cohorts got my workshops
What you get
Mentoring Subscription - Jeroen as a Service (JAAS 👸)
2 or 4 hours call time per month
Free to divide: 4×30 min, 2×1 hr, etc.
Weekly fixed timeslot as a basis
But very flexible to reschedule
Unlimited DMs
You can email me or WhatsApp me unlimited questions throughout the week
1 hour kick-off deep dive
The first call we take a little longer to get all the cards on the table


From B2C to deep tech
Experience with many startup types
Consumer hardware & software
Trained as a product designer, I love tailoring solutions and propositions to consumers. Marketing to consumers is different than businesses. I'll teach you how.
B2B
How to sell to businessess? How to segment a market if there are 4 stakeholders? Having advised many B2B startups, I help you to navigate that maze.
B2G (Government)
Governments are a peculiar customer type. Mandate is scattered, the organisations can seem like an impenetrable fortress. I will help you get there.
Deep Tech
Science based startups or academic founders to find their beachhead market.

Pricing
Flexible: cancelable each month and you can switch between plans.
Not happy after first month? Full refund, no small print.
Pony
Yearly revenue below €25k
€190
/ month (excl. VAT)
€300
/ month (excl. VAT)
2 or 4 hours call time per month
Unlimited DMs
1 hour kick-off
For startups with
ARR below €25k
Bootstrapping startups
Horsey
Yearly revenue btween €25k and €100k
€250
/ month (excl. VAT)
€400
/ month (excl. VAT)
2 or 4 hours call time per month
Unlimited DMs
1 hour kick-off
For startups with
ARR between €25k and €100k or
Recent investment of €50k+
Unicorn
Yearly revenue over €100k
€370
/ month (excl. VAT)
€600
/ month (excl. VAT)
2 or 4 hours call time per month
Unlimited DMs
1 hour kick-off
For startups with
ARR above €100k or
Recent investment of €250k+
Quick get to know chat?
Leave your email and I'll reach out