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About Us


Our team supported some of the highest growth ecommerce companies in Europe and built some of the largest ecommerce brands in the region, with several new brands in development.

Accelerating Online Growth

Guericom is the brain-child of Rok Hrastnik, an ecommerce professional responsible for some of the highest-growth ecommerce businesses in the CEE region.



As Deputy CEO of Sensilab, Rok lead the transformation of the company to become an ecommerce-first €40M+ market-leading dietary supplement house of brands across 17 EU markets, with a fully centralized organization in a single hybrid location.


Studio Moderna

Starting practically from scratch, Rok lead the development of the Studio Moderna ecommerce business to more than €50M in annual revenue and a team of 150+ ecommerce professionals across 22 CEE markets.

Major Consulting Clients

  • As an advisor, Rok helped Vision Healthcare in the areas of digital growth, cross-channel digital measurement and performance optimization, and digital organization setup, working both with central teams and market leading digitally-native brands and online retailers, such as Vitamin Express (Germany), Baerbel Drexel (Germany), Nupure (Germany), Flinndal (Netherlands), N2 (Spain), Lectinect (Nordics) and others.
  • Helped develop Fenzy, a high-growth online fashion player from Slovenia.
  • Strategically supported VigoShop management to help the company become the largest ecommerce company from Slovenia.

Other Projects and Clients

Either directly or through agency relationships, Rok also consulted various other companies throughout his career, including Outfit7, Mercator, BabyCenter, Žito, A1 and many others. He also has several US online publishing projects under his belt.

What Does "Guericom" Actually Mean?

In Rok’s early marketing days he was most impacted by the direct marketing giants and their teachings, starting with Jay C. Levinson and his guerrilla marketing philosophy. The name Guericom pays homage to both guerrilla marketing and to the overall direct marketing approach that favors measurable performance above all else.


We only work with a few selected clients who we believe have the highest potential to make an impact. Please complete this form for us both to see if we can work together.

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