SEO agency Netherlands
21x is an SEO agency in the Netherlands for international companies that sell to Dutch customers. Those customers search on Google.nl and ask AI assistants such as ChatGPT for advice in their own language. 21x works on both: being found in Google and being named in Dutch-language AI answers.
21x is an SEO agency in the Netherlands, based in Maastricht. It helps international companies get found on Google.nl and named in Dutch AI answers, measured with Dutch customer questions.
Based in Maastricht · Measured in Dutch · Google.nl plus six AI systems · 94% of answers included a comparison platform
Source: Writgo AI Citation Index, July 2026Updated:
Who 21x works for
21x is based in Maastricht, close to the Belgian and German borders. It works for two groups: international companies with a base in the Netherlands, and foreign companies entering the Dutch market.
Both groups often face the same gap. The website is in English or translated from it, while Dutch customers search and ask in their own words.
That is why 21x measures in Dutch, with questions written the way Dutch buyers ask them. The measurement covers Google.nl and six AI systems: ChatGPT, Claude, Gemini, Perplexity, Google AI Overviews and Microsoft Copilot.
The Dutch market also has its own sources. In a July 2026 measurement of fifty Dutch buying questions, 94% of AI answers included at least one comparison platform. For a company new to the market, presence on those platforms matters, not only the website.
Example questions
These are illustrations, not measured data. They show how Dutch buyers phrase a need, which a translated English page often misses.
IT services
Which IT company in Eindhoven can manage our network? The buyer names a city and a task, not a product.
Software
What is good accounting software for a private limited company with staff? The Dutch legal form is part of the question.
Staffing
Which staffing agency in Rotterdam has experience in logistics? Sector experience is the selection criterion.
Legal
Which law firm in Amsterdam helps foreign companies with employment law? An English-only site rarely answers this in Dutch.
Energy
Who installs solar panels on a commercial building in Limburg? The region narrows the answer to local installers.
Manufacturing
Which supplier makes custom stainless steel parts in the Netherlands? The words 'in Nederland' filter for local suppliers.
None of them contains a company name. The audit uses the same kind: non-branded, in Dutch, from the buyer's side.
How it works
A call about your offer, your Dutch customers and your competitors in the Netherlands. From that, 21x writes 30 non-branded questions in Dutch.
21x checks your site on Google.nl and puts each question to six AI systems 3 times, logged out.
21x fixes technical issues and Dutch pages that are missing or read as translations. It also aligns your company details on your site and Dutch platforms with your registration at the Dutch business register (KVK).
Monthly SEO work and, where useful, a monthly re-measurement of your AI visibility. Each month you see what was done and what moved.
What it costs
The cost depends on the size of your site, the competition in your Dutch market and the technical state of the site. You know what you pay before any work starts.
Know where you stand
Insight into 9 areas, 3 to 5 priorities and advice on your next step.
€295one-off
excl. VAT
5 to 7 working days
Discuss BasecampFix the foundation
Basecamp plus implementation of the most important improvements to your website.
€695one-off
excl. VAT
10 to 14 working days
Discuss ClimbTake a bigger step
A complete improvement round for your most important pages, with an agreed scope.
€1,995one-off
excl. VAT
3 to 6 weeks
Discuss SummitKeep climbing
Digital PR, monthly measurements and upkeep of the information about your business.
€695/ month
excl. VAT
Minimum 3 months
Then cancel monthly
Who you work with
Stan Vreuls founded 21x and works from an office on Hoogbrugstraat in Maastricht. For an international company, this means the measurement runs in Dutch for Dutch buyers, while the conversations about it can be in English.
You can meet at the office or online, and you deal with Stan directly rather than with an account manager. He has eleven years of experience in search engine optimisation and, since January 2026, has also focused fully on AI visibility.
Questions
Ask who does the work, how progress is measured and in which language. A provider that measures in English will miss how Dutch customers search. Also ask what happens to the work if you stop: at 21x, everything built stays yours.
Yes. 21x is based in Maastricht and works for companies across the Netherlands, Amsterdam included. The approach does not depend on where your office is.
21x works for B2B companies and for companies that sell to consumers. The method is the same: measure the questions buyers ask, then fix what scored weak.
Yes, calls and communication can be in English. The measurement for the Dutch market runs in Dutch, because that is the language your customers use.
No. Google states in its own guidance that nobody can guarantee a first position. 21x sells no positions and reports each month what moved.
Next step
Stan Vreuls, Founder of 21x
In a call you hear whether your site and company details are ready for Dutch search and Dutch AI answers. If there is little to gain, you will hear that too.
stan@21x.nl