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Zest

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Zest is a Poland-based performance marketing and production agency serving B2B and e-commerce clients internationally. The agency is an official Google and Meta partner, delivering paid media, website and e-commerce development, UGC and AI-assisted creative production, and marketing analytics as a single integrated service rather than as separate specialist engagements. Zest's model centers on a shared team structure: the same group responsible for media buying also owns tracking implementation and creative output, which removes the reporting gaps that typically appear when those functions sit with different vendors. Each engagement begins with an analytics build-out — a custom dashboard and proprietary tracking pixel consolidating ad spend, CRM, and revenue data — before any budget is scaled, giving clients a verified view of profitability (MER, blended CAC, LTV/CAC) rather than platform-reported estimates. The agency also develops Loyalz, a proprietary loyalty, social-activation, and creative-analytics platform aimed at e-commerce and DTC brands looking to increase customer lifetime value. Reported outcomes for Zest clients include an average revenue increase of 30.7% within six months and over 5.24M PLN in tracked client revenue generated over the past year. Clients receive weekly performance reviews from a member of the account team.

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