About us
Digital growth gets stronger when everything fits.
We are Jesse and Derk, the familiar faces behind Cosymize. Jesse looks after the commercial line and the personal contact. Derk connects positioning, technology and online marketing. Behind us works a team of specialists we bring in per question, so every choice suits your organisation and the step you want to take after it.
Why we do this
Cosymize came out of one clear idea: digital growth works better when strategy, technology, marketing and continuity reinforce each other. So we look not only at what has to be built today, but at how every choice stays clear and usable tomorrow.
In practice that means one place for the website, the marketing, the technology and the follow-up. Not because we want to do everything, but because the gain sits precisely in the handovers: where an enquiry becomes a customer, or is left sitting.
SyntraDesk is the logical next step. What we now wire together by hand for each client comes together in one environment you can operate yourself, with or without an IT department.
Fixed points of contact, and that is a choice. It keeps the lines short: the person you speak to is the person who decides. The work itself we do with a team of specialists we bring in per question: people we work with often and stand behind. So you keep one counterpart without your project depending on a single diary.
What to hold us to
Clear
Plain language, a fixed price up front and clarity on what recurs. The first invoice says what the quote said.
Considered
Rather one awkward question too many than one assumption too few. A wrong foundation can't be fixed with design.
Measurable
Every choice gets a number you can hold it to. Without measurement it's just an opinion.
Human
Automation takes over the routine, not the people. You always speak to someone who knows your project.
Durable
What we build lasts. You own the domain, code, content and data. Leaving should be as easy as starting.
Who you'll speak to
These are your points of contact. Behind them works a team of specialists who join per question.

Jesse Peijffers
Founder & Head of Commerce
Connects entrepreneurs, opportunities and solutions that demonstrably add value. Jesse guards the personal contact and the commercial relevance of every engagement.
- Strategy
- Client contact
- Commerce

Derk Gähler
Co-founder & Digital Expert
Connects positioning, web development and online marketing into one clear digital product that is beautiful, functional and easy to use.
- Positioning
- Technology
- Marketing
We also work with a fixed circle of specialists for design, development, content and advertising: people we know and vouch for. For IT hardware we work with Circular IT Group; that service sits with them, we make the introduction.
Mission & vision
Mission
We make digital growth clear by connecting websites, marketing, maintenance and automation logically in one personal collaboration. That way you keep the overview and the wheel, while your digital foundation can grow with your organisation.
Vision
We believe in a future where organisations no longer have to manage separate tools, suppliers and processes. Their digital foundation works as one understandable whole: professionally built, dependably maintained and always steered by people.
Trusted by organisations that want to move forward
Next step
Let's build what works for you.
Tell us where you stand today and where you want to go. Jesse or Derk will think it through with you personally and point to the step that pays off most right now. Rather see for yourself first? Take the Growth Scan: six questions, two minutes, an instant picture on screen.
- A personal answer
- No obligations
- Straight to Jesse or Derk
Jesse Peijffers
Founder & Head of Commerce