One Day Agency is targetting French expansion in 2026 as it rounds off 2025 by celebrating its six-year anniversary.
The agency is closing 2025 with reported 60 percent year-on-year growth, underpinned by a surge in enterprise-level wins across Entertainment, Regulated Markets, and B2B Technology. Recent account additions include Cineworld Cinemas, Betway, and global software leader JetBrains, strengthening the agency’s position as an integrated partner for complex, multinational campaigns.
Founded in 2019 on a simple belief, that creative, media, and performance should operate as a single unit, not separate departments, its integrated “no-silos” structure has powered the independent agency through the volatile post-pandemic market.
This year’s growth marks a continuation of One Day’s global ambitions, accelerated by its acquisition by the Behrens Group. With a more mature operational backbone, the agency has executed a successful market entry into Poland, establishing a Warsaw office that now contributes to nearly half of international billings and acts as an innovation hub for AI-driven creative and cross-market campaigns.
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As part of its international development, One Day successfully entered the Polish market in 2024. Building on that success, the agency is preparing to reinforce its presence in France in 2026, strengthening its footprint across Europe and supporting brands with multi-market advertising capabilities.
Recruitment and infrastructure planning for France are already underway, with bilingual talent and senior planners preparing the foundations for the 2026 launch.
Internally, One Day has evolved from a founder-driven startup into a multi-market team powered by distributed leadership across Manchester, London, and Warsaw. The agency credits its pace of growth to its “flat structure, rapid workflows, and the collaborative model that inspired its name.”
This international trajectory is deeply rooted in the vision of CEO Ricardo Seixas, whose long-standing ambition to build a global, multi-market agency continues to shape One Day’s direction and expansion strategy.
Wiam El Youbi, marketing manager at One Day Agency, said: “Six years feels like both a milestone and a launchpad. What started as a small, disruptive idea has grown into a team delivering campaigns across continents and categories. Our momentum this year, from our 60% growth to the calibre of brands joining us, shows the strength of our integrated model and the ambition within this team. We’re incredibly excited for our next chapter, especially as we build on our success in Poland and prepare to enter the French market in 2026.”
