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Discover right away what fits you.
Tell us who it is for and what is going on. You see right away what fits, why, and what you will learn. Rather browse yourself? Everything is below, with prices.
Klaas's assistant
AI assistant, not a person
Tell me briefly what is going on and I will help you find what fits. If I know too little, I will ask.
Start for free.
First see whether my approach suits you. Free and no obligation.
Free masterclass
Difficult customer? Turn them into a fan.
An online session on staying calm and yourself with a difficult customer, with real examples and time for your questions.
For whom: anyone who wants to get to know my approach.
Next date follows soon
Free
Free scan
From Customer to Fan scan
Score yourself on the Customer Experience Model and see right away where your biggest gains are.
For whom: anyone who wants to know how customers experience their company, alone or with the team.
46 statements · in a few minutes
Free
The books.
The approach on paper, as an e-book or as an audiobook read by me.
Pre-order
Van klant naar fan
An 8 is a customer, a 9 or 10 is a fan. How the whole company turns customers into fans. Dutch edition only.
For whom: everyone in the company, from the board to the colleague who ships the order.
Available from 14 November 2026
€27.50hardcopy
Pre-order
E-book Van klant naar fan
Read right away on your computer, tablet or phone. Dutch edition only.
For whom: anyone who prefers reading on a screen.
Available from 14 November 2026
€22.50incl. VAT
Pre-order
Audiobook Van klant naar fan
Listen on the go, while exercising or at home on the couch. Narrated by me. Dutch edition only.
For whom: anyone who would rather listen than read.
Available from 14 November 2026
€22.50incl. VAT
#1 bestseller
Sales, Honest & Relaxed
Selling from real connection: more revenue with less stress. 2nd edition, 3,000+ sold.
For whom: everyone who sells and wants to do it honestly and relaxed.
Hardcopy · E-book · Audiobook
€32.50hardcopy
Read now
E-book Sales, Honest & Relaxed
Read right away on your computer, tablet or phone.
For whom: anyone who prefers reading on a screen.
Instant access after payment
€22.50incl. VAT
Listen now
Audiobook Sales, Honest & Relaxed
Listen on the go, while exercising or at home on the couch. Narrated by me.
For whom: anyone who would rather listen than read.
Instant access after payment
€22.50incl. VAT
Online, at your own pace.
After six modules you know where you stand, what your customers and colleagues really think of you, and you have a plan you can keep up. Pay right away or by invoice, with instant access.
Start now
Sales Excellence Training
Six modules on the Customer Experience Model with video, explanation and exercises. You score yourself, get feedback from customers and colleagues and spar with Klaas AI.
For whom: everyone who sells and wants more revenue with less pressure.
A year of access, a monthly reminder to measure your growth
€ 1,750excl. VAT
Start now
Customer Success Training
Six modules on the Customer Experience Model with video, explanation and exercises. You score yourself, get feedback from customers and colleagues and spar with Klaas AI.
For whom: professionals in customer contact, service and delivery.
A year of access, a monthly reminder to measure your growth
€ 1,750excl. VAT
Together with me.
The same training, with me alongside you. We start together and you finish with a presentation where you get my feedback. At my place at Landgoed Duin en Bosch in Castricum, or at your location. You request it and pay by invoice.
By invoice
Sales Excellence Training
More revenue with less pressure, and customers who enjoy doing business with you. With the online training and me at your side: we start together and finish with my feedback and a tailored plan.
For whom: salespeople who want to do it personally with me.
At my place at Duin en Bosch. At your location: € 6,750
€ 4,250excl. VAT
By invoice
Customer Success Training
Customers who stay, buy more and recommend you. With the online training and me at your side: we start together and finish with my feedback and a tailored plan.
For whom: people in customer contact who want to do it personally with me.
At my place at Duin en Bosch. At your location: € 6,750
€ 4,250excl. VAT
With your team.
Bring everyone with customer contact along, so you speak the same language and turn customers into fans together.
2,5 uur
Inspiration session
Real inspiration for your whole team, and everyone goes home with a short action plan. Option: everyone receives the book in advance.
For whom: teams that want to get moving in one go.
In the Netherlands. Belgium on request
€ 3,750excl. VAT
Full day
Inspiration day
Inspiration in the morning; in the afternoon we go deeper with the team and agree on concrete actions together.
For whom: teams that want to follow through right away.
In the Netherlands. Belgium on request
€ 5,750excl. VAT
By invoice
Sales Excellence or Customer Success Training with your team
You choose the training that fits. Everyone takes it online, and I guide the kick-off and the final presentation. At my place at Duin en Bosch or at your location.
For whom: sales and customer teams who want to win and keep more customers together.
You get a tailored proposal
from € 6,000excl. VAT
Grow with someone at your side.
A sparring partner who has done it himself: more revenue with less stress, clear choices and customers who become fans. Also without a training.
1-op-1
Coaching with me
You no longer have to do it alone. I think along with you, mirror you honestly and help you follow through. Four half-days at Landgoed Duin en Bosch in Castricum, and in between you call me when you get stuck.
For whom: business owners, management and professionals who want to grow, with more calm.
Through an intro call
€ 5,000per year, excl. VAT
Not sure what fits you?
Book an intro call.
In twenty minutes we look at your situation together and find the best starting point.