Why We Exist

About Us

The shift from search to synthesis is happening now. When people ask AI for recommendations, the model doesn't return a list of links—it makes choices. It synthesises, summarises, and selects. If your brand isn't part of that synthesis, you're invisible.

Most marketing agencies haven't noticed. They're still optimising for algorithms that rank pages, not models that understand meaning. We built PromptMarketing because someone needs to bridge that gap—with rigor, not hype.

The Four Pillars of Relevance Engineering

01. Machine Readability First

We build structured data architectures that move beyond "best practices" to create verifiable machine trust.

02. Probabilistic, Not Guaranteed

We acknowledge that LLMs are probabilistic; our work focuses on influencing the weights and associations within the latent space to favor your brand.

03. Data Provenance

In the era of synthesis, verifiable data is currency. We establish clear provenance chains that AI agents can validate for transaction.

04. The Long Game

We avoid "hacks." We build technical foundations that evolve as models update, ensuring long-term visibility without technical debt.

What We Believe

Measurement Over Opinion

If we can't measure it, we don't claim it. Every technical action is tied to an observable shift in AI visibility metrics.

Transparency By Default

We show our work. Clients see the methodology, the risks, the reasoning. No black boxes, no proprietary "magic."

Long-Term Thinking

Quick wins that create technical debt aren't wins. We build architecture that serves brands for years, not quarters.

Honest Limitations

We'll tell you when something is outside our expertise or when your expectations exceed what's possible. Trust requires honesty.

A Gang of Super Specialists

We're a collective of deep experts. No generalists. No gurus. Just people who know their craft, are eager to explore, learn and dive deep.

Fleur Steenbrink

GEO / Content

Fleur Steenbrink

10 years SEO experience; specialist in AEO/GEO content strategies and semantic HTML foundations.

Ramon Guliker

GEO / Technical

Ramon Guliker

13 years SEO experience; expert in technical SXO audits and off-page authority building.

Wouter van der Meij

GEO / Technical

Wouter van der Meij

16 years SEO experience; specialist in optimizing site architecture and EEAT signals for machine trust.

Bart Kalisvaart

AI Developer

Bart Kalisvaart

15 years dev experience; expert in AI workflows, agents, and platform integrations like ACP and MCP.

Erik Jan Reijenga

Business Consultant

Erik Jan Reijenga

Agency COO & CEO exp; bridges the gap between technical AI engineering and enterprise growth strategies.

Arjan ter Huurne

Founder

Arjan ter Huurne

20 years in Search marketing; pioneer in shifting from referral engines to generative experiences.

Thomas Huijsmans

Web Dev

Thomas Huijsmans

Full-stack developer; builds performant, accessible sites with structured data architectures for optimal AI visibility.

Our Partners

AI.AM

Our office space is the AI.AM Hub in Amsterdam - breeding ground for AI startups. All our processes & workflows are AI powered.

Promptwatch

Deep partnership with this leading AI Visibility tool. We get founder-level support and give feedback on product roadmap.

Everywhere Network

International Agency Network, access to more than 15 markets. We collaborate as an innovation hub in AI Search.

Google

Instrumental company throughout Arjan's career. We've built strong relationships in many parts of the Google org.

Interested in Working With Us?

We take on a limited number of engagements to ensure depth over breadth. If you're serious about AI visibility, let's talk.

Start a Conversation

Ready to become machine-readable?

Contact us to learn how Relevance Engineering can help your brand become AI-ready.