Growth with grip
Stevin sets your marketing up right and watches it day and night. And everything stays yours: your accounts, your data, your knowledge.
First the diagnosis, on your own data. Only then a proposal.
Reads along on all your channels
Sound familiar?
“In one month I bought nearly 1,100 euro of leads. I got not a single job out of it.”
“No, that is all on gut feeling. And in my head.”
“He could work out my margin, because he knew what I paid. And I do not want that.”
“Those are all separate systems with their own logins. But there is no link anywhere, no central memory.”
These are not exceptions. This is how the market works, as long as nobody is watching. Even agencies say it themselves.
From real diagnosis conversations, anonymised.
See for yourself
You can check the state of your marketing yourself, today. Three checks. Most business owners have never done them, because almost nobody knows they exist.
What that looks like
Not a report after the fact. Stevin watches what comes in today and what your brand is worth a year from now. Those are two different things, and they rarely sit in the same overview.
[Both venues] Major Meta outage is affecting ad delivery
bugmetaoutageincident
Why: Ad delivery is stuttering and accounts are spending erratically. Confirmed by several sources.
Advice: Pause the exposed Meta sets, shift budget to TikTok and Google for now, restart once Meta reports green.
From the Stevin Desk. LUMIOS is our demo environment, not client data.
Every campaign, every decision, every result, and what the competition was doing at the time. Including the work that only pays off months later, which is the first thing to drop out of sight. Whoever starts here tomorrow reads up, instead of you explaining it all over again.
A single client memory, the way it sits in the Desk.Drag the nodes around.
How it works
Diagnosis
We do not start with a contract, we start with your data. You see in black and white what is right and what is not. No strings attached, and you keep the report.
Set it right
Before a single extra euro goes to campaigns, the foundation is in place.
Watch it
Every decision is recorded, and you always look along in the same log.
Everything stays yours
We build in your exit from day one. That is why we dare to say it.
Your marketing memory
Everything that ever happened in your marketing stays findable. And usable.
Who it is for
For business owners
We handle it, and you can always check that it is right. We build in your exit from day one: you are never locked in.
For marketing teams
Faster than your agency, every decision recorded, insight down to the margin. And when someone leaves, the knowledge does not leave with them.
Why Stevin
The engineer from Bruges who brought mathematics into plain language.
Everything measured, everything recorded, everything verifiable. Craftsmanship instead of sales talk.
Knowledge belongs to the owner. Your accounts, your data, your marketing brain, whoever comes or goes.
“For twenty years I sat on the other side of the invoice. I know how hours and media margins work, because I earned from them myself. That is why Stevin is built the other way around.”
Our research
3,667
Dutch and Belgian advertisers who do not own their own campaign data
1.9 m
ads from those companies, tracked continuously in Google’s public register
Source: ongoing Stevin research on Google’s public transparency register for the Netherlands and Belgium, as of 29 July 2026. What this does and does not prove is explained in the method.
And this is only Google. Meta, LinkedIn and TikTok are counted next. This research runs every week, and everything we find is published, method included. That is how we build the proof that this market can work differently.
Pricing
From 399per month
Full management is available too, tailored and always after the diagnosis. No hidden margins on your media budget, no entry price that quietly doubles. And you can always stop, with everything that is yours.
Frequently asked questions
You do. Always. Accounts are in your company’s name, data is exportable and every decision sits in a file that belongs to you.
You keep everything: accounts, data, knowledge and the full file. The handover is built in from day one, so stopping costs you nothing. Except us.
Both. Most clients choose managed: we set up and actively manage, the system watches day and night. You can always look along and verify.
Yes. The diagnosis is a good second opinion: if things are right, you now know for sure. If they are not, you have something to discuss.
From 399 per month. Full management is available too, tailored after the diagnosis. You know exactly what you get and what it costs, upfront.
AI reads along and signals, people decide. The platform changes nothing on its own, data stays in the EU, and nothing leaves the door without a human looking at it.
The next step
Start the diagnosis. Within two weeks you see in black and white where your marketing stands. On your own numbers.
Start the diagnosisWe take on a limited number of new clients per month, because every start begins with a full setup.
stevin.ai
Eerst de diagnose, dan een voorstel
Zwart op wit waar je staat
