We are Onder!

We are ready to kick off, and ready to help you compete on Google. We believe that a good online marketing strategy starts with a solid foundation in search engine optimisation. Our team can provide the forwards for your marketing team, or if you prefer us to be at the forefront of scoring on Google? We are here for you.

Regardless of whether you want to devise a SEO strategy and execute it yourself, or put the entire SEO campaign in our experienced hands, we are your team.

SEO agency Onder

Our passion for top positions in Google has shaped us into passionate SEO specialists. Our goal is clear: to make our clients shine with search terms that really matter. Not only that, we onder support you on all fronts of SEO:

⚽️ technical optimisations to lose out to the competition
⚽️ content improvements to avoid Google penalties
⚽️ increase your online authority to convince Google's referee

We train every day!

photo game of table football by colleagues from agency Onder

Every day we are working on search engine optimisation. As a small and flexible agency, we have the advantage of being able to move quickly and test new ideas immediately. Our success stories are shaped by innovative experiments that lead our clients to victory. Curious about our team?

Our team of star players is already eager to step onto the SEO pitch and work with you. Our team photo was even taken in the middle of a football pitch - a nod to our enthusiasm for the game as well as SEO. Together, we will build a winning strategy so that your company conquers possession of the ball on Google and leaves the competition behind.

Ball possession on Google?

We understand that there are many SEO teams, but at Onder we are different. Our approach is creative, bold and targeted. We not only score high positions in Google, but also ensure long ball possession(sustainable growth of your online visibility). Choose us and discover our search engine optimisation tactics that score.

Let's make history together in the Google competition. Onder backed by our expertise and passion for the game, your business will be successful in any search engine competition, zonder offside straight to the point.

Contact us today and we'll show you how we get the ball rolling for a glorious victory in the online world. No red cards, only fair play and top performance!

Any questions?

Do you want to know more about SEO? Could your website use a new boost?
Get in touch

This is us!

A team of SEO specialists

Our team consists of enthusiastic SEO specialists who are happy to work with you for the best results.

Meet our team

These customers are supupside down from us!

Renzo van Dongen

Renzo van Dongen

Digital content manager Peugeot

Whether it's about content or technical adjustments, it doesn't matter. Martijn briefs this in a very clear way so that it can be implemented locally or by our head office in France. [...] Since the start of our collaboration, we have achieved great results. Keep it up!

Marien van Stegeren

Eigenaar Kitcentrum

When your online onder venture grows, expectations often grow too, in every area. To a large extent, we were in control of SEO and its interpretation ourselves. We found out that our own "general view" was no longer sufficient, so we engaged Bureau Onder. Surprising and clear. We have built up a fine collaboration, partly because Martijn also regularly visits our office with Eline or Mariska (depending on the case), which is very valuable to us!

Marten Stellingwerf


Martijn and Mariska make the SEO story understandable for the layman and are happy to think along with us. It is nice that there is a personal contact moment every month with an extensive report and the opportunity to talk everything through. After just a few months, Onder has already managed to achieve number 1 positions on Google with some of our webshop pages. We are very satisfied with Onder.

Mark Prummel

SEO Specialist Stella Fietsen

For several years, Onder has been a valued partner of Stella. Martijn is my sparring partner for complex SEO issues and the extra pair of critical eyes that keeps us on our toes. Together, we have achieved nice growth in online visibility, visitor numbers and leads. Onder onder stands out for its short lines of communication and professionalism. They speak our language: don't nag, get down to business. That is what we love!


Don't miss a single SEO insight
  • Insights on SEO
  • For beginners and advanced specialists
  • From experiments to developments at Google and from
    best practices to our own cases
  • A look behind the scenes at Onder

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