What I've done and for whom
What the people I've worked with say about working together. No percentages, and no charts nobody can verify anyway.
- No percentages or charts, which nobody can verify anyway
- In clients' own words – nothing added or polished
- Over 10 years on both sides of the table – big brands and small online stores
30 minutes online, free. I'll tell you what I'd tackle in your business – not what I did somewhere else.
Why there are no numbers here
Most marketing case studies claim 80% growth. What's almost always missing is the starting point, what was happening in the market, and what else the company changed at the same time.
So you won't find numbers here. When case studies appear on this page, they'll describe the decisions – and you'll see whether my thinking makes sense to you far better than any chart could show.
What clients say
What clients wrote, with nothing changed in substance.
„David helped us find our way around SEO as a whole and, above all, set up optimization for our filtered category pages. Working with David was a real pleasure – he's not only a marketing expert but also an organized professional who knows how to listen to what you need!“
Martin BorlLittle Shoes„Working with David on SEO and PPC was professional, yet very human and easy to follow. He isn't afraid to go deep, and at the same time he explains things so that even non-experts understand. Thanks to his recommendations, the website's visibility improved significantly. He's reliable and always looks for effective, tailored solutions.“
Lukáš Kenji VrábelProduct, corporate, and lifestyle photographer„In 2 hours, David gave us an engaging, practical overview of which AI tools you can use on their free plans, and which tools are best suited to different types of work. Everything was clear and useful for us. I'd definitely recommend David to anyone else interested in AI.“
Přemek JanovskýČSOB„Working with David was a huge relief and a real help for me from the very start. Our meetings were full of inspiration and ideas. David knows his field very well, he listens, and he's remarkably versatile – he gets a feel for the brand, proposes a plan, knows how to set up the marketing tools, understands your needs, and delivers what was agreed.“
Edita DostálováRedbit„David helped us get our analytics in order when it was spread across several parties. I value his knowledge, his proactive approach, and his fearlessness in wading into tricky waters. Thank you.“
Veronika BednářováColours of Ostrava„We've worked with David on several different projects, and the impression was always the same. Professionalism, reliability, and a drive to find solutions – whether conventional or ‘outside the box.’ A marketing Swiss Army knife whose services I can recommend with complete peace of mind to anyone looking for a reliable partner in this field.“
Petr KlementAltlift„David is creative, direct, strategic, and very much his own person. He's a real pleasure to communicate with, mainly because he always tells you the uncomfortable truth too – and that moves people and projects forward.“
Matouš LacinaSystedo„I've known David for several years – we worked together on setting up Google Analytics for Meet&Deal and SEO for AndreKohout.cz, so I know he delivers! He's someone who really understands marketing, from strategy and SEO to the practical use of AI. Exactly the kind of person where you see results, not just nice presentations.“
André KohoutMeet&Deal„We work with David Zelenka on technical matters. The work and changes he's done for us have always been first-rate. His experience in the online world is very important and valuable.“
Josef HandrejchKvalitex
Over 10 years on both sides of the table – big brands, and online stores where marketing gets done in the evenings.
Want to be next?
It starts with 30 minutes where you tell me what you're dealing with.
