Found by the people who matter — in every market you serve.
SEO Agency in Amsterdam
Search engine optimization (SEO) is a matter of trust: you hand the findability of your organisation to a partner whose work only shows months later. So you don’t want promises — you want an approach you can follow, and numbers you can check.
Marsmedia has been an SEO agency for organisations with complex innovation for twenty years — biotech, life sciences, medtech, sustainable tech, SaaS. Not as a separate service, but woven into how we think, write and build websites. Strategy, content, technology and measurement, in one hand.
And because people increasingly ask their questions to ChatGPT and other AI assistants, being findable there is simply part of the work now.
4.9 average on Google, 44+ reviews
Why organisations bring in an SEO agency
Rarely because they don’t understand SEO. Usually because doing it well is continuous work — and half attention in this field returns nothing.
Search engine optimization doesn’t work in campaigns but in months: content that has to mature, technology that has to be maintained, positions that have to be tracked and adjusted.
That continuous character is exactly what makes it hard to staff internally. It slides down the to-do list behind the urgency of the day — until findability drops and it’s suddenly urgent.
What we see in many SEO projects done elsewhere: quantity over quality. Producing as many pages as possible, generic in substance, live as fast as possible — and hoping it adds up. Google and AI systems are both trained to recognise exactly that.
What remains is the real work: a technically sound site, content that genuinely answers questions, and a consistent story. People want to know what kind of organisation they’d be working with — you can’t read that in a hundred rushed pages. You can in ten good ones.
Whoever says “SEO” today means more than Google. People ask ChatGPT, Claude and Perplexity — and those systems give one answer instead of ten results.
Good SEO now lays a foundation that harvests twice: in the classic search results and in AI answers. An agency you bring in today should know both worlds.
Ranking in one market is craft; ranking in several is architecture. International SEO adds a layer most agencies never touch: hreflang, language versions written as originals rather than translations, and content that convinces a reader in Boston as well as one in Berlin.
We’ve worked that way for twenty years, for clients across the Netherlands, the US, the UK, China and South Africa. It’s not a speciality we added — it’s how our clients operate.
4.9 average on Google, 44+ reviews
Our SEO services, specifically
SEO strategy and keyword research
Every engagement starts with strategy: which questions does your audience ask, in which language, and which pages should be the answer? We ground that in data — volumes, difficulty, intent — rather than in gut feeling.
What you get: a concrete page agenda with priorities, where every page has a clear job and a reason.
Content that ranks and convinces
We write and rewrite pages that serve two readers at once: the person looking for an answer, and the search engine deciding whether your page is that answer. In the language of the searcher — not in jargon nobody types.
Because we pick up your world quickly, the substance stays right. SEO content that puts off the engineer or the investor has, on balance, returned nothing.
Technical SEO
Crawlability, speed, structure, structured data — the layer underneath the content, where findability is won or lost before a single word is read.
Because we design and build websites ourselves, technical SEO isn’t a recommendations PDF here. We implement what we find.
Findable in AI
A growing share of questions gets answered outside Google — by ChatGPT, Claude and Perplexity. We make sure content and structure are readable and citable for those systems too. And that visibility has become measurable, with tools like Ahrefs Brand Radar — we set that measurement up for you.
Read more about that new discipline on our page about generative engine optimization.
“SEO isn’t a department next to the website.
It’s how the website should be made.”
— Marsmedia
What working with us looks like
At a new enquiry we call first — simply to hear whether we’re a fit. Then comes a discovery session where the core question surfaces together: the founder at the table, a UX designer, and someone from brand where needed.
Across twenty years and more than 300 websites, that’s been the constant: the projects that succeed start with the right people at the table — on both sides.
The design decision we defend most often: not trying to say everything. The more a page says, the more likely the visitor decides on their own — and leaves without a conversation.
We look for the single most important thing per screen: just enough to convince, with a clear next step. Calm isn’t a style choice; it’s conversion work.
What we often find in sites built elsewhere: back to the builder for every small change, at a cost. Not with us — our own block system lets your team build and edit pages without being able to break the site.
And when we develop new modules, existing clients simply get them too.
A live website is our starting point, not the finish. We set up the measurement — behaviour, conversion, findability — and adjust based on what the data shows.
Ninety per cent of our clients stay after the first project. That’s no coincidence: the work gets better the longer we measure.
“In web design Amsterdam, I enjoy strategically shaping elements to draw visitors’ attention and instill trust in their brand’s professionalism. It’s fulfilling to help clients effectively communicate their products or services through visually appealing and user-friendly designs.”
Marsmedia
Considering bringing in an SEO agency?
How we work
Not just a creative digital agency in Amsterdam.
We call first
Every enquiry starts with a phone call: is this a fit, can we genuinely add value? If not, we point you to someone better placed. If so, we plan a discovery session — the joint brainstorm where the real question surfaces: for which questions are you invisible today when you shouldn’t be?
We simplify
Most websites carry the weight of old ideas: pages competing for each other’s keywords, structure that expanded over the years, content once written for an algorithm that no longer exists.
We strip back to what earns its place — for the reader and for the systems that decide whether they find you. Fewer pages that perform better beat more pages that get in each other’s way. That’s the hardest part of the craft, and exactly where twenty years count.
We measure until it works
A website is never finished — and with SEO that’s the whole point. We track positions, adjust on what the data shows, and report on what actually happens: impressions, positions, enquiries. Not on what was changed.
For the team that has to report internally on the investment, the story gets written in those months — not on delivery day.
Connected services we offer
Brand
Website
Frequently asked questions
An SEO agency makes organisations findable at the moment someone searches for what they do — without paying per click. The work spans three layers: technology (can your site be found and read), content (is the right answer on it) and authority (why would this be the trusted source).
The terms SEO agency and SEO company are used interchangeably; they describe the same thing. What matters is how the work is organised: as loose tactics, or as strategy, content, technology and measurement in one hand.
When findability matters and nobody internally has structural time for it. SEO is continuous work — content that has to mature, technology that has to be maintained, data that asks for adjustment — and that continuous character is usually the first thing to slip internally.
The alternative isn’t necessarily outsourcing everything: many clients combine our strategy and technical work with content partly written in-house. We’ll look together at what fits your team and budget.
An SEO consultant advises; an agency advises and executes. For an organisation with a strong internal team, a consultant can be enough — someone who sets the direction while your people do the work.
The honest question is where the execution will land. If the answer is “on the pile”, advice alone changes nothing. We work both ways, and we’ll tell you which one your situation actually needs.
A fixed approach: first a strategy with a concrete page agenda, then execution — content, technology, structure — followed by continuous measurement and adjustment. For each phase it’s clear upfront what we deliver and what we need from you.
And sometimes the strategy decides what not to chase. When five or ten large players with million-euro budgets sit on your dream keyword, we say so — and build your findability through long-tail terms and the things that genuinely set you apart. Better to be found where you can win than to fight for years where you can’t.
And reporting on what actually happens: positions, impressions, enquiries. Not a monthly list of completed tasks.
Honestly: count on three to six months before structural results show, depending on where you start. Technical fixes work through faster (weeks); new content and authority need time.
Anyone promising faster guarantees is either guessing or cutting corners. What we can do: measure from day one, so you see the movement long before the end result is in.
That depends on ambition and starting point: a technically sound site with good content asks for different work than a site missing both. After a first analysis we share a proposal per phase, so you decide on numbers rather than promises.
For context: SEO competes with your advertising budget. Every position you win organically is traffic you don’t pay per click for — this year, and next year again.
Google Ads buys visibility for as long as you pay; SEO builds visibility that stays. Ads works instantly and stops instantly; SEO works slower and holds.
In practice they reinforce each other: Ads for the short term and for testing search terms, SEO for the structural base. We do both, and we advise the balance based on your situation — not on what earns us most.
The foundation does: a technically sound site with clear, factual content performs in both worlds. But AI systems weigh sources slightly differently — they cite websites that answer questions directly and tell the same story everywhere.
That new layer is called generative engine optimization. And it has become measurable, with tools like Ahrefs Brand Radar — we set that measurement up for you. Any organisation bringing in an SEO agency today should expect that layer to be included; with us, it is.
Yes — it’s how most of our clients operate. International SEO adds an architectural layer: hreflang, language versions written as originals rather than translations, and keyword research per market, because the buyer’s language differs per country.
Our own website runs that way, and so do our clients’ — across the Netherlands, the US, the UK, China and South Africa.
Yes. We’re an SEO agency in Amsterdam, but the work travels: shared Slack, biweekly calls, and reporting you can read without us in the room.
For SEO specifically, distance matters even less than for design work — the data is the same everywhere, and the process was built for remote collaboration years ago.
Three things.
One: SEO isn’t a separate service here, but part of how websites are conceived, written and built. Most SEO problems we encounter arise precisely at the handovers we don’t have.
Two: we write in the language of the searcher, with the depth of your field. SEO content that puts off the engineer or the investor has returned nothing.
Three: we measure and report on reality — positions, impressions, enquiries, and now AI visibility too. No task lists, but movement you can see.
Volume isn’t our position. Depth is.
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