Digital Out-of-Home (DOOH) advertising is reaching consumers in the physical world in more spaces than ever before. Advertisers know it’s effective: 76% of consumers take action after seeing an OOH ad. That’s why programmatic DOOH will reach $1.23 billion ad spend in 2026.
Plenty of platforms tout DOOH advertising capabilities. How do you choose one that will make channel integration effortless, not a chore?
This post breaks down the DOOH platform essentials. We’ll guide you through what to look for, the types of DOOH ad platforms out there, and how they compare.
A DOOH ad platform enables businesses to display digital ads on public, out-of-home screens — digital billboards, transit hubs, elevator screens, and rideshare screens.
Traditional out-of-home requires physical and static ad materials. On the other hand, DOOH platforms automate bidding and ad delivery on digital screens. This means you can have dynamic ads targeted for specific locations and interests.
In other words, DOOH platforms use programmatic ad delivery in much the same way display, CTV, native, and other ad types deliver programmatically for their respective channels. Similar buying process, different channel delivery.
We categorized the top players into two groups: Independent DSPs that integrate DOOH into a larger ad strategy, and specialized platforms built specifically for DOOH.
Independent DSPs let you work with a variety of publishers to purchase ad impressions — and they also let you serve ads across a variety of channels, DOOH included.
These DSPs let you measure and run multi-channel campaigns in one place, which reduces some of the headache of advertising on several channels.
Examples: AdRoll, StackAdapt, The Trade Desk.
Specialized platforms are built specifically for DOOH advertising. The benefit of a specialized DOOH platform is its dedication to inventory, reach, and measurement all for one channel. However, specialized platforms carry the con of friction integrating into an existing adtech stack, which can be more time-consuming and costly than working with a DSP that carries the multi-channel approach.
Examples: Broadsign, Perion, Vistar Media.
With DOOH specifically, there are a few core features you need to evaluate for compatibility with your existing ad strategy.
Many DOOH platforms have similar table-stakes capabilities when it comes to features like measurement and inventory quality, but these are the main elements that can be used to determine the right DOOH platform for your business.
In theory, DOOH platforms have a lot of the same inventory strengths and problems. When evaluating reach, we look at inventory quality, screen quality, and data quality from inventory. The truth is, most platforms have access to the same inventory, so reach is similar in this regard.
The DOOH gold standard includes global targeting and existing business lines that demonstrate a strong international presence. Platforms with expertise in global markets are advantageous if your campaigns have an international scope — and that’s where some DOOH platforms fall short.
When comparing providers, consider:
Geographic coverage and market density
Access to premium venues such as transit hubs, retail environments, and high-traffic corridors
Depth of direct publisher relationships
Transparency into specific screen locations
When it comes to inventory, AdRoll has trillions of impressions available across 35 countries and 1.7 million screens, giving you some of the best access to global inventory. Some DSPs, like Viant, have the strongest presence in North America and are still expanding global inventory.
Inventory access will also vary across specialized platforms. Vistar Media has one of the largest programmatic DOOH networks globally, bolstered by acquisition by T-Mobile. This means Vistar has significant international reach.
VIOOH, on the other hand, has a parent company that’s been in physical advertising for decades, but their history is in the EMEA market.
Operational control is what separates DOOH from traditional billboard buying. It’s the difference between being locked into a traditional contract for a physical ad and having the agility to pivot based on real-world triggers.
Evaluate whether the platform supports:
Budget pacing controls
Schedule adjustments during flight
Creative rotation within placements
Frequency management across screens
Clear visibility into delivery metrics
AdRoll lets you run precisely targeted DOOH flights that drive impact for launches, seasonal campaigns and more.
Adtech stacks grow more complicated as you integrate more channels. Can your chosen DOOH platform communicate with your existing adtech stack?
When evaluating platforms, consider:
Whether DOOH integrates into existing buying workflows
If audience segmentation can remain consistent across channels
Whether reporting aligns with other media performance dashboards
How identity and audience logic are applied across campaign types
Ideally, you want a platform that either integrates effortlessly with your other ad channels or consolidates your stack by being multi-channel. Many DOOH platforms can offer you the same basic inventory, measurement, and bidding process — but does your chosen platform make your job easier, or more complicated with an additional platform, login page, dashboard, and everything else?
Most DOOH platforms will have your basic programmatic targeting capabilities: demographic, psychographic, behavioral, and location-based targeting.
Look for support of:
Radius targeting around specific locations
Point-of-interest targeting
Time-of-day scheduling
Event-based triggers
Behavioral and interest overlays
Custom audience ingestion
Consider how your chosen platform interacts with your existing CRM data, target audience, and/or target accounts. Do you have to rely solely on the DOOH platform’s audience segments, or can you use your CRM to create your own?
For B2B companies, some platforms will have a unique edge here. AdRoll ABM offers a unified identity graph that connects high-intent B2B account data directly to the physical screens your decision-makers pass. You can target attendees at industry events, particular office events of high-fit accounts, or reach decision-makers in particular companies
Here’s the truth about DOOH measurement: most platforms will offer similar measurement capabilities. All DOOH platforms will have some dashboard or table that reports on your DOOH campaigns — the problem is that many DOOH platforms grade their own homework.
Assess whether the platform provides:
Transparent impression reporting
Location-based visitation lift analysis
Clear methodology behind modeled data
Integration into broader campaign dashboards or cross-channel measurement
Performance data should move beyond estimated reach and provide visibility that supports optimization and budget allocation decisions.
Lastly, consider the most flexible feature to evaluate: flexibility. Is your chosen DOOH platform going to meet your team’s needs with its package or plan? A platform can have all the right features, but if they don’t support your campaign or team needs, it’s a waste of money.
When comparing platforms, evaluate:
Self-service versus managed-service options
Minimum spend requirements
Creative specifications
Launch timelines
Some platforms are known best for their self-service focus, like StackAdapt. Others have an even split of flexibility between self-service and managed services, like AdRoll.
Also, check the minimums for the features you’re interested in. For example, TTD doesn't always publish a strict minimum, but they might expect a commitment of at least $20,000 to $100,000 per month to get direct access.
AdRoll is one of the independent DSPs that offers DOOH as a channel. What makes us a good fit for you?
AdRoll has a number of distinct advantages that make it the top choice for digital advertisers.
AdRoll has historically been known as a retargeting platform, and we have over 20 years of experience helping digital advertisers recapture the attention of audiences.
AdRoll’s background with digital campaigns will help us guide you through DOOH placement decisions. Not only can you access DOOH through our platform, but you can also access retargeting with the best in the business.
Unlike many other DSPs, AdRoll enables ABM for B2B. AdRoll can take your customer lists and intent signals, built through its other ad channels, to help you identify and target DOOH audiences.
Many other DOOH platforms aren’t able to use intent-based data to target key accounts.
Most DOOH platforms can give you a range of inventory through their programmatic exchanges.
AdRoll differentiates through how data shapes placement decisions. AdRoll informs its DOOH campaigns with its proprietary data: audience insights, behavioral signals, and historical performance. Since inventory isn’t always the best DOOH differentiator, go for the platform that offers the best data to inform which inventory to use.
To choose a DOOH platform, look at your holistic ad strategy. DOOH is part of the bigger picture, creating a ripple effect across other channels, and it should be considered in a multi-channel, full-funnel campaign.
Consider a full-funnel advertising platform that offers DOOH, like we do here at AdRoll. An ad platform that consolidates your stack rather than adding to it will benefit you in the long term.
Last updated on March 13th, 2026.