Top 50 Integrated Agency 2023. Drum Recommended Agency.

UK, Poland, France & Germany.

About One Day.

A Leading Advertising and Marketing Agency.

Creative. Media. Digital. Finally speaking the same language.

One Day Agency is an independent integrated partner with a footprint spanning the UK and Europe. We help ambitious brands break free from outdated agency structures. By eliminating knowledge silos, we offer a seamless, unified approach that connects your story to your audience without the friction.

Our Work

Inside One Day

We Bridge the Gap.

We didn't start One Day to be just another agency on the roster. We started in 2019 to fix a broken model. For too long, brands have paid for creative that doesn't understand media, and media strategies that stifle creativity.

We exist to dismantle those silos. We fuse advertising, marketing, and media into a single, fluid workflow that moves as fast as the market does.

We Operate Without Borders.

From a standing start in Manchester in 2019, we have rapidly expanded into a global force. Today, One Day operates across Manchester, London, Warsaw, Paris and Berlin, delivering campaigns that resonate from the UK to all corners of the world and brands of all sizes across all industries.

We don't just "buy media" in these regions; we navigate their cultures. Whether you are scaling locally or launching in multiple international markets, our infrastructure handles the complexity while you keep the agility of a single, dedicated partner. No middleman or specialists.

We Are Proof That "No-Silos" Works.

Rapid Ascent: In just a few short years, we’ve gone from a challenger brand to a recognised Top 50 Integrated Agency.

Unmatched Agility: Our work has been recognised globally, including top honours for our agile response strategies proving that when you remove the barriers between data and creative, you win.

Global Reach: We successfully manage complex multi-market campaigns for brands like BigCommerce, Cineworld, Visit Jordan and major e-commerce players, coordinating seamless execution across borders without the "bloat" of traditional networks.

We Lead From the Front.

You will not find anyone hidden behind layers of account management. Everyone here works hands on, directly involved in client work, taking full ownership and accountability across strategy, creative and delivery.

Ricardo Seixas (Founder and CEO), Klaudia Szelugowska (Head of Growth), Anita Puchalska (Poland Director) and Kris Anne Viray (Head of Design) are part of the same senior practitioner team, each bringing specialist leadership to their areas while working side by side with the rest of the agency.

We are all client facing, operating at the same level, ensuring you have direct access to the people actually driving your growth.

We Only Deploy Senior Talent.

The industry habit of "pitching with seniors and delivering with juniors" ends here. We deploy senior talent end-to-end, meaning the experts devising your strategy are the same people executing it.

Crucially, we do not have a Client Services department. We believe traditional account management often creates unintended conflicts of interest, placing a buffer between you and the reality of the work. By removing this layer, we align our incentives purely with your success. You speak directly to the experts solving your problems, ensuring nothing gets lost in translation, and the strategic vision remains intact from day one to delivery.

All-Senior Team.

Ricardo | Founder & CEO

Anita | Poland Director

Klaudia | Head of Growth

Marina | People & OPS

Kerry | Media

Alex | Media

Shelby | Growth

Alexandra | Media

Scott | Growth

Stephanie | Growth

Pixel | Kennelytics

Codie | Chief Tail Wagging

Jeff | Meowketing

Dominic | Design

Kris-Anne | Head of Design

Wiam | Marketing

Sailor | Growth

Meet the Team

Careers at One Day

Partners & Memberships

MPA The Digital, Creative & Media Community

Recognised by

See Our Work

What our clients are saying…

Codorníu Raventos - International Brand Manager Europe & Asia

“About Nielsen data: It is once again very positive for us because while the category fell by 11.6% in value, and the cava category decreased by 5.6%, we are once again the green dot in the data, growing vs. the previous year's and increase of market share. These results are clearly related to the MKT campaigns during April and July. So, once again, thank you very much for your wonderful support. We are achieving great things in the UK thanks to these impactful marketing campaigns.”
Mark Hodson, VP of Marketing at UNiDAYS

"Freshers is such a pivotal moment for UNiDAYS. As the UK's leading student platform, working with a tried and trusted team was key. We've found that in One Day. Their professionalism and unique approach to measuring effectiveness and incrementality is truly exceptional".
General Manager, Itchy Baby Co

“We needed a digital agency that rocks the pants off it in the social & digital space that was fast, flexible, insightful and fun. Critical for us was someone that was responsive, really understood paid digital, and had the ability to make short, sharp, quick creative ads. One Day is that Agency. We are extremely excited to see what 2021 brings working with the talented team as we launch into the UK.”
Gurveer Chana, BigCommerce's Demand Generation Manager

“It was an incredible experience partnering with IDA agency. We handed them a strict budget, and they met it and exceeded our expectations. Their professionalism, creativity, and unwavering support were instrumental in our campaign’s success. From designing ad t picking locations and strategies, the were with us every step of the way, and we couldn’t be happier with the results.”