International Advertising

Advertise in Helsinki

Advertise in Helsinki with One Day Agency

Achieve Brand Familiarity With Affluent Finnish Consumers Via Helsinki Advertising

Helsinki is both the capital and the most populated city in Finland. With a population of 656,000, it is augmented by the millions of domestic and international visitors who flock to the city during peak travel periods.

Last year, the city welcomed 2.4 million global arrivals, creating a multicultural international audience base for brand advertisers to target. The largest groups visiting Helsinki include visitors from the US, Sweden, Finland, Germany, Estonia, and the UK.

The outdoor marketing sector in Finland has grown significantly in recent years. Given that the vast majority of this activity is based in Helsinki, the city's position as a global leader in business, innovation, and tourism has provided even more compelling opportunities for brands keen to extend their reach.

Why Advertise in Helsinki?

Across Finland, spending on outdoor advertising has increased 8.7% year on year, with huge investments in digital out-of-home infrastructure boosting the market and providing innovative ways to capture interest from younger and affluent audiences.

Helsinki attracts continued demand from brands seeking to gain market share in Finland but also across the wider region, positioning themselves in a city that is perceived as one of the most forward-thinking and progressive in the world, with an ever-growing population of professionals and expat-owned businesses.

Brands can use the diversity of the Helsinki cityscape as a strategic advantage, targeting affluent residents, multinational businesses, and tourists. They can also use smart city initiatives that have introduced new digital screens in numerous high-traffic destinations.

Why One Day?

One Day is a dynamic, creative team of advertising and marketing experts. We create campaigns that speak directly to international audiences, built around in-depth insights into the cultural and social norms and consumer expectations that can help global brands augment their relevance and appeal in a new location.

Our all-senior teams work in an integrated way to combine our varied specialisms, ensuring every client has access to world-class creatives and insights into current media trends and can deploy campaigns with the benefit of advanced ad tech, media planning and media buying resources.

Advertise in Helsinki: Key Formats

Latest Out-of-Home Campaigns.

See below our selected work in media planning and buying, click or tap to view.

Technology Services - International OOH Campaign

FMCG - Out-of-Home Campaign in Ireland.

Non-Alcoholic Beer - Out-of-Home Campaign & TV

Speak with our planning team today.

💻 By video call.

Book a video call

📨 Send a message.

👉 Who will you speak to?

At One Day, you speak directly with senior strategists and directors involved in the work, not account handlers or junior intermediaries. Expect straight advice from experts across Creative, OOH, Digital, and global media activation.

Shelby

Sailor

Scott

“Helsinki blends Nordic design, digital innovation, and cultural influence—making it a powerful setting for high-impact outdoor advertising. At One Day Agency, we help brands reach audiences across the city’s most strategic locations, from transit corridors and central station hubs to retail zones and waterfront districts. With deep local insight and seamless campaign delivery, we turn Helsinki’s urban space into a stage for bold, effective storytelling.”

Ricardo Seixas, Founder and CEO, One Day Agency

Frequently Asked Questions.

Full-funnel Advertising Agency

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.”

International Media Planning and Buying.

Advertise across the Globe

International OOH Advertising

Media Environments

Get in touch today.

Helsinki Advertising and Media planning.