Which OOH platforms offer programmatic ad inventory?

Short answer

The leading programmatic DOOH platforms are Vistar, Hivestack, VIOOH, Broadsign Reach, and Adomni. Each operates as a supply-side platform or exchange, connecting digital screens to demand-side buyers through real-time auctions. Omnichannel SSPs like PubMatic, Magnite, and OpenX also carry DOOH inventory alongside other programmatic formats.

How programmatic DOOH buying works

A programmatic DOOH supply-side platform (SSP) or exchange automates the sale of digital out of home inventory by connecting screens to demand-side platforms (DSPs). When inventory becomes available, the SSP sends a bid request to DSPs. DSPs bid based on targeting parameters, including location, time of day, venue type, and audience demographics. The highest bidder wins and the creative is served dynamically on the screen.

This replaces manual insertion orders and fixed placements with an impression-based auction system. The result is a shift from buying a fixed location for a fixed period to buying audience-and-impression-based segments that can be adjusted, paused, or cancelled quickly.

Static printed formats are excluded from programmatic sales because they lack the connectivity and dynamic content capabilities that the auction model requires.

The five core programmatic DOOH platforms

Vistar is one of the largest global DOOH SSPs and exchanges, connecting thousands of screens worldwide to multiple DSPs. Large multi-market OOH networks favor it for broad demand access and monetization scale.

Hivestack combines SSP and DSP functionality into a single end-to-end platform. It is known for international scale, location-based targeting, and advanced campaign triggers such as weather and time of day, with granular audience segmentation and dynamic optimization.

VIOOH is backed by JCDecaux and focuses on premium transit and urban inventory: airports, street furniture, and high-value urban environments. It provides programmatic access to exclusive placements that carry higher audience quality.

Broadsign Reach is an SSP and exchange layer built directly on the Broadsign content management system. Networks already running Broadsign CMS can add Reach to streamline yield management and connect to programmatic demand without a separate onboarding process.

Adomni is a self-service programmatic buying platform for advertisers. It aggregates highway billboards, urban displays, airports, transit, retail media, and gas station networks. It offers AI-assisted planning, campaign optimization, and measurement, and it integrates DOOH with connected TV and online video for cross-channel attribution.

Inventory types available programmatically

Programmatic DOOH covers any internet-connected screen capable of dynamic ad serving:

• Highway and urban digital billboards
• Street furniture including bus shelters and kiosks
• Transit screens in rail, subway, bus, and rideshare hubs
• Airport displays
• Retail media networks including in-store screens and malls
• Gas station digital networks
• Place-based displays in bars, gyms, offices, and clinics

Major media owners including Outfront, Lamar, and Clear Channel Outdoor run programmatic sales through integrations with platforms like Vistar, Broadsign Reach, and VIOOH. Most DOOH networks work with multiple SSPs, typically two to four, to maximize demand and avoid dependence on a single platform.

Advantages and trade-offs for buyers

Programmatic DOOH offers several practical advantages. Targeting is data-driven, using location, time, weather, and other signals rather than fixed demographic assumptions. Creative can update dynamically based on triggers and rules. Campaigns can be adjusted or paused quickly, unlike traditional OOH buys locked into long-term contracts. Platforms like Adomni also connect DOOH to CTV and online video, enabling unified measurement across channels.

The trade-offs are worth understanding before committing budget. Programmatic buyers purchase from inventory pools and may have limited control over exact placements or share of voice on a specific screen. Tech fees and commissions across SSPs, DSPs, and data providers can raise effective CPMs compared to direct buys. And unlike traditional OOH, programmatic campaigns do not always provide physical proof of posting or photos confirming specific placements ran.

Advertisers seeking self-service flexibility tend toward Adomni. Buyers working through omnichannel DSPs access DOOH inventory via Vistar, Hivestack, VIOOH, and integrated partners. Media owners with Broadsign CMS benefit most from adding Broadsign Reach, while premium transit and airport networks often prioritize VIOOH or Vistar for quality demand.

How AdQuick handles programmatic DOOH

AdQuick connects advertisers to digital OOH inventory across formats and markets through a single planning and buying interface. Rather than managing separate relationships with each SSP, buyers can use AdQuick's advertising products to plan, purchase, and measure campaigns that span programmatic and traditional OOH in one workflow. The platform supports targeting by geography, venue type, and audience, and provides measurement tools that bring reporting parity between DOOH and other digital channels.