Bart Knijnenberg. Marketing since 2008. Building since always.
I replaced my marketing department with eighteen AI agents. They work the night shift. At seven in the morning the work is done and there is exactly one thing left for a human to do, which is decide what goes out.
The pipeline runs every night from 22:30 to 07:00 Amsterdam time. Fixed order, each agent reads what the previous one produced. Nothing leaves the building without my approval. The office above is that team drawn small: eighteen robots on the night shift, the green light marks whoever is on duty, the Chief of Staff walks the floor asking every specialist a different question, the coffee corner is there for morale rather than for coffee, and the desk on the right is where everything waits for my GO. The last cycle in the header is read from the run logs when this page is built, so it is the real number and not a claim.
Worked with, over 18 years
Three products, built and marketed by the same system. Each with an honest status, because two of them are not finished.
GDPR-proof cookie consent at a flat price per site. No pageview limits, no surprises on the invoice.
The AI team took this from first line of code to live site, including security reviews that killed the work twice before it was allowed through.
plainconsent.com →A complete AI marketing team for Dutch companies that do not have one. You send a message, your team does the work, you approve with one click.
This is the productised version of what I run myself. I only started selling it after it had run in my own business for a year.
ensemblo.nl →An AI strength coach that knows your whole body, from training and nutrition to recovery and injuries, and turns that into one calm answer per day. No confetti, no streak shaming.
The system is not marketing-only. The same agent structure does the engineering here: plan, build, review, test, ship. Twelve coach personas, multilingual, in production.
no public link yetSterka has no public site yet. These are mockups from its own design system, not screenshots of the app.
A fixed crew and a fixed route, and the route ends at me.
Strategy, SEO, content, design, outreach, advertising, data, branding, publishing. Plus a management layer that guards priorities and a development team that builds the products.
The pipeline starts at 22:30 and runs until 07:00. Each agent reads what the previous one produced and hands off to the next. I wake up to a one page briefing.
Copy goes through brand review, visuals through creative review, code through security and quality gates. Work that fails goes back, not forward.
Autonomous in execution, me in control. That is not a marketing line, that is how it is built. External actions are closed by default.
The crew · 18
Building in public only works if the failures are in there too. A few:
Two security reviewers gave my first product release a hard fail. XSS through innerHTML, unvalidated input, prototype pollution. They were right. It only shipped after the fixes.
One agent kept using the wrong job title in external copy for months. I had to build a separate brand gate for it.
I built and shipped an integration, then deleted it three weeks later because it depended on an approval that never came.
My own two websites published the same number with a factor 66 difference for months. Nobody flagged it. I found it myself.
the 18 years underneath
I have been doing this for 18 years. In that time I have helped 200+ companies and allocated €200M+ in media budget, across agencies, platforms and in-house teams. I took The Next Web to 70,000+ attendees and grew Labelnone from 2 to 27 people in twelve months.
So I know how this works with people. That is exactly why I can see what a system does and does not take over from them.
Next to building I take on a few Fractional CMO engagements a year. Senior marketing leadership for a company that needs it and is not ready to hire it full time. And I speak about AI teams, usually about the parts that did not work.
2 to 4 days per month, strategy and execution. Cancel monthly.
One session, I look at what you are building.
On autonomous AI teams, with the numbers and the failures included.
No marketing team and you want one? Look at Ensemblo. You have a team and you are stuck? Book a call. Just curious how I built this? Read the blog, it is all there.