SpaceAdd

SpaceAdd, a South Korean company established in December 2017, operates as a digital out-of-home (DOOH) media platform, focusing on transforming underutilized areas into valuable advertising spaces. The company was founded by CEO Oh Chang-keun, whose 15-year background in the financial sector at firms like KPMG and Samsung Fire & Marine Insurance Asset Management sparked the idea of creating value from the unused spaces he observed in office buildings. He is joined by Deputy CEO Han Tae-woong.

The business installs and operates digital signage in high-traffic, niche locations, primarily targeting prime office buildings in major business districts. This strategy allows advertisers to reach a captive audience of office workers. The company’s revenue is generated by selling advertising space on its network of screens. SpaceAdd's business model involves partnering with building owners to install digital media, often digitizing tenant directories and providing curated content, which adds value back to the property owners. This approach creates a competitive barrier, as the building-specific media and content are not easily replicated.

The company's core service is its "Prime Office Media," a network of digital screens located in building lobbies, elevator halls, and other common areas. By March 2025, SpaceAdd had expanded its network to over 600 buildings, reaching an estimated audience of 2 million office workers. Beyond offices, their network extends to premium golf practice ranges, gyms, restaurants, and clubs. To enhance its offering, SpaceAdd utilizes a content management system from Signagelive and has partnered with AdMobilize to implement computer vision-based audience analytics, providing advertisers with detailed campaign performance metrics. This allows for more accountable and data-driven advertising campaigns.

SpaceAdd achieved 1 billion won in sales in its first full year of operation, 2018. The company has secured multiple rounds of funding, including a Series A from Altos Ventures in April 2019, a Seed round of $1.72M in November 2019, and a Series B in March 2021. More recently, it was selected for the Korea Credit Guarantee Fund's "Pre-ICON" program, an initiative supporting high-growth startups.

Keywords: digital out-of-home advertising, DOOH, office media, digital signage, South Korea, ad-tech, property technology, in-building advertising, audience analytics, commercial real estate media, place-based media, Oh Chang-keun, Altos Ventures, prime office media, space value creation, location-based advertising, advertising network, building media solutions, corporate advertising