Saying no to millions. Building something real instead - Alex Holliman, Climbing Trees & Oliver Zenglein, The Boutique Agency
Most agency founders never talk about the clients they turned down. The money they left on the table. The moment they realised that winning the pitch and living with the decision were two completely different things.
Alex Holliman and Oliver Zenglein talk about it constantly.
They met through agency networks - the kind of spaces where people go when they need to process things they can't say in normal business settings. They're both in performance marketing. They're both in different countries. And they're both building agencies that look radically different from what the industry expects.
Alex spent his entire career in agencies. Three of the top five media agencies in London. A startup that grew to £25 million before he left. At 35, he thought: if I don't do this now, I work for someone else forever. So he started Climbing Trees 15 years ago. Performance marketing. SEO. Paid media. Ethical from the beginning, but it took him years to realise that ethics wasn't a marketing angle - it was the actual strategy.
Oliver took a different route to the same place. He was a touring musician in a ska-reggae band for years. Then he joined windeln.de as CMO from the very start - watched it scale, watched it prepare for IPO, felt Goldman Sachs money change the pressure in the room. When he realised the IPO timeline wasn't compatible with having a family and staying sane, he left. Founded The Boutique Agency in Munich in 2015. Performance marketing. SEA. The same discipline, different country.
What they discovered - independently, then together - is that turning away business is harder than taking it. Alex has turned down approximately £1 million worth of pitches over three years. Gambling clients. Fast fashion. Fossil fuel companies. Industries they didn't want to amplify. Oliver has a code of ethics that excludes entire sectors, regardless of financial pressure.
About Supo:
Supo provides people-first intelligence software for professional services firms, helping businesses maximize profit and motivate their people through powerful, AI-enabled business intelligence dashboards. By connecting over 500+ platforms and providing real-time data analysis, Supo helps firms make better data-driven decisions about their profit, projects, and people.
For more information about Supo: [https://www.supo.co.uk/]www.supo.co.uk [http://www.supo.co.uk/]
About Climbing Trees:
Climbing Trees is a performance ads and SEO agency based in Colchester, Essex, driven to ethically deliver results for companies that will shape the future world. Founded by Alex Holliman in 2010, Climbing Trees specialises in data-driven growth for B2B organisations, e-commerce brands, and purpose-led organisations including Greenpeace and Olympus Cameras. As a B Corp certified agency with the King's Award for Sustainable Business, Climbing Trees integrates sustainability into every decision - from who they work with to how they measure impact. Their methodology seamlessly combines performance discipline with ethical practice, proving that growth and good can coexist.
For more information about Climbing Trees: www.climbingtrees.com [http://www.climbingtrees.com/]
About The Boutique Agency:
The Boutique Agency is an award-winning performance marketing agency based in Munich, founded by Oliver Zenglein in 2015. Specialising in SEA, SEO, and paid social, The Boutique Agency helps B2B, e-commerce, travel, and purpose-driven organisations achieve profitable and sustainable growth. With a team of over 40 specialists, The Boutique Agency is B Corp certified and operates with core values of passion, transparency, appreciation, and responsibility. They've established a code of ethics that guides which clients and industries they'll work with, demonstrating that performance marketing and purpose-driven business aren't mutually exclusive.
For more information about The Boutique Agency: www.the-boutique-agency.de [http://www.the-boutique-agency.de/]