

Tree Online
MarketingConcurrent is a full-service online marketing agency based in Veenendaal, the Netherlands, focused on measurable online growth through SEO, SEA, CRO and web design. Our philosophy: growth from marketing, leverage from AI. With more than ten years of experience, we work for clients across a wide range of industries, from small businesses to international players. We manage €60 million in ad spend annually across more than 20 countries, with an average ROAS of 7.4×. We have been a Google Premier Partner for eight years running, placing us among the top 3% of agencies in the Netherlands. We are also a certified partner of Meta, Microsoft, LinkedIn and TikTok, among others. Clients rate us 4.5 on Trustpilot and 4.9 on Google.
Our team of 15 strategists, marketers, developers and data experts works from a single, centrally located office in Veenendaal. AI is embedded in every process, which gives us speed and drives additional growth. You get one dedicated point of contact who is also your specialist, a reply via WhatsApp within 24 hours, and short turnaround times.
SEO & GEO
We improve your organic visibility in Google, as well as your visibility in AI search engines and AI assistants (Generative Engine Optimization).
SEA (Google Ads & Microsoft Ads)
Instant visibility at the top of Google and Bing, exactly when your customer is searching. As an SEA agency from Veenendaal, we manage €60 million in ad spend each year and steer on ROAS, CPA and revenue, amplified by AI.
CRO & A/B testing
We increase the return on the traffic you already have. We analyse user behaviour, test hypotheses and optimise landing pages and checkouts based on data.
Web design & development
We build fast, high-converting websites and webshops, including on Shopify. We also handle website migrations.
Social Ads
We run campaigns on Meta, TikTok and LinkedIn with precise targeting, as a complement to search marketing.
General info about Tree Online agency
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