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Programmatic DOOH Explained (2026): DSPs, SSPs, Ad Servers and How Screens Get Bought

Updated 2026-10-29

Short answer: programmatic DOOH (pDOOH) is buying digital billboard and screen time through software instead of contracts. A buyer sets locations, times, audience and budget in a demand-side platform (DSP). Screen owners offer their open time through a supply-side platform (SSP). An ad server on the screen side plays the winning ad and reports back. Prices are quoted as a CPM, the cost per thousand estimated viewers, typically about $5 to $15, and you pay only for plays that run.

Programmatic is growing fast. It went from about 15% of US digital out-of-home spend in 2023 to 24% in 2024, with forecasts of 65% by 2029 (OAAA, via sixteen:nine). Digital as a whole was 36.3% of the $9.46 billion US out-of-home market in 2025 (OAAA, via Digital Signage Today).

The programmatic DOOH stack

Every programmatic play passes through the same layers. Some companies own several of them.

Layer What it does Examples
Screens (media owners) Own the digital billboards and place-based screens and decide what inventory to sell programmatically Lamar, Clear Channel, Outfront, place-based networks in gyms, malls, gas stations and EV chargers
Ad server / CMS Software that runs the screen's loop, decides what plays and when, and logs every play Broadsign, Hivestack, Vistar
SSP (supply-side platform) Packages a media owner's open time and offers it to buyers, with floor prices and rules Place Exchange (Broadsign), VIOOH (JCDecaux), Vistar, Hivestack
DSP (demand-side platform) Where buyers plan, target, bid and report OOH specialists: Vistar, Hivestack. Omnichannel DSPs that include DOOH: The Trade Desk, Google Display & Video 360, StackAdapt
Measurement Estimates who sees each play, and attribution after the campaign Geopath audience estimates, mobile location data, brand lift studies

Plain-English version: the DSP is the buyer's shopping cart, the SSP is the screen owner's storefront, and the ad server is the playlist running on the screen.

What happens in one ad play

  1. A slot opens. The screen's ad server has an upcoming play that isn't sold directly.
  2. The SSP sends a request to connected DSPs: which screen, where, what time, its size, and how many people are expected to see this one play.
  3. DSPs check their campaigns. Is this screen in a targeted area, at an allowed time, matching the audience profile, under budget?
  4. Bids come back. The SSP picks a winner using price floors and the deal's rules.
  5. The ad plays, usually for 8 to 15 seconds.
  6. Proof of play. The ad server logs that the ad ran, and the buyer is charged for the estimated audience of that play.

Unlike web ads, the creative is usually approved and cached on the screen in advance. Media owners review ads before they're allowed to run, so a brand-new campaign can take a day or more to go live.

How impressions and CPMs work on screens

A web ad has one viewer. A billboard play can have dozens. So programmatic DOOH uses an impression multiplier: an estimate of how many people see a single play on that screen at that hour.

Example: a screen with a multiplier of 14.5, bought at a $10 CPM, costs about $0.145 per play. That's $10 divided by 1,000 viewers, times 14.5 viewers (Trillboards).

  • The IAB Tech Lab added DOOH fields to the OpenRTB standard in 2022 so the multiplier can travel with each bid request (AdExchanger).
  • The multiplier is modeled, not counted. Roadside numbers usually come from Geopath-style traffic and visibility models. Place-based networks may use venue visit data or cameras that count faces without storing them.
  • Not all multipliers are equal. Two screens at the same CPM can have very different real audiences depending on how the owner models them. Ask which measurement source a network uses.

For more on how out-of-home audiences are estimated, see what is Geopath.

Deal types

Deal type How it works Best for
Open exchange Real-time auction for any available inventory that meets your targeting Broad reach at the lowest price, no guarantee of specific screens
Private marketplace (PMP) Invitation-only auction with negotiated floor prices and selected screens Brands that want certain networks or premium screens without fixed commitments
Programmatic guaranteed (PG) Fixed price and reserved plays, bought through the DSP Campaigns that need delivery locked in, like a launch date
Direct (not programmatic) A contract with the operator for a slot over a set period Local businesses buying a few boards for months

What programmatic DOOH costs

  • Average CPM: the average programmatic out-of-home CPM was about $7.62 in the second half of 2024 (MediaPost).
  • By venue: AdQuick's benchmarks put roadside digital at a median of about $8, malls and retail around $10, and airports around $14 (AdQuick).
  • Minimums: managed-service programmatic campaigns often carry $10,000 to $50,000 minimums, while self-serve DSPs can start much lower (AdQuick). Omnichannel DSPs like The Trade Desk are usually accessed through an agency.
  • Fees: DSPs and agencies take a share on top of media, often stated as a percentage of spend. Ask what part of your CPM reaches the screen owner.

How that compares with buying direct: published direct-buy CPMs in our city guides range from about $5 to $9 for digital bulletins in Kansas City to $21 to $69 in Washington DC (digital billboard costs by city; DC rates). Programmatic is often competitive on CPM, but you buy plays across many screens instead of a fixed share of one board.

What you can target

  • Location: draw a radius, pick DMAs or ZIP codes, or target screens near specific places (your stores, competitors, stadiums)
  • Time: dayparts and days of the week, down to the hour
  • Venue type: roadside, transit, airports, gyms, bars, malls, gas stations, EV chargers, offices
  • Audience: screens whose modeled audience over-indexes for a group (for example, commuters, parents or high-income households), usually built from anonymized mobile location data
  • Triggers: some platforms switch creative by weather, sports scores or other live data

Programmatic vs direct: which should you use?

Choose programmatic if... Buy direct if...
You're running in several markets at once You want specific boards in one town
You want to pay only for certain hours or audiences You want your ad on the board all day, every day
You already buy online ads through a DSP You don't have an agency or ad-tech account
You need flexible start and stop dates You'll run for months and want the lowest cost per play
You want place-based screens from many networks You also want static bulletins, posters or benches

For most single-location local businesses, direct is simpler. Call the operators near you through our city guides or request quotes. If you want self-serve without an agency, Blip is the small-budget version of programmatic.

The major platforms in 2026

The market has consolidated fast:

  • Vistar Media: DSP, SSP and ad server; its network spans more than 1.1 million screens. T-Mobile bought it for about $600 million, closing February 3, 2025 (GeekWire; T-Mobile).
  • Hivestack: full-stack DOOH (ad server, SSP and DSP) in 32 countries. Perion bought it for $100 million in December 2023 (MediaPost).
  • Broadsign and Place Exchange: Broadsign makes screen software used by media owners; it acquired the SSP Place Exchange in November 2025, giving it about 1.8 million programmatically available screens (Business Wire).
  • VIOOH: the SSP majority-owned by JCDecaux. JCDecaux's programmatic revenue through VIOOH grew 19.2% in 2025 to €180.5 million, in 35 countries (PPC Land).
  • Omnichannel DSPs: The Trade Desk, Google Display & Video 360 and StackAdapt let buyers add DOOH to online, CTV and mobile campaigns.
  • Self-serve: Blip sells single plays on digital billboards with a credit card. AdQuick is a marketplace for both static and digital billboards.

See every platform, grouped by role, in our out-of-home ad platforms directory, and how they compare in the best programmatic DOOH platforms.

How to buy programmatic DOOH

  1. Start with the goal and markets. Programmatic shines for multi-market reach and audience targeting.
  2. Pick a route: an agency or trading desk, a self-serve DOOH DSP, or the DOOH tab in a DSP you already use.
  3. Choose inventory: open exchange for reach, a PMP or programmatic guaranteed deal for specific networks.
  4. Build creative for each screen size. DOOH has many sizes, and media owners approve ads before they run. Allow a few days.
  5. Set measurement up front: a control region, brand lift study, website traffic by area, or mobile location attribution.
  6. Run long enough. Two to four weeks minimum; brand effects build over months.

Frequently asked questions

What is programmatic DOOH?

Buying digital out-of-home screen time automatically through ad tech platforms. Buyers target by location, time and audience in a DSP, and screens sell their open time through an SSP. You pay per estimated thousand viewers (CPM) for plays that actually run.

What is a DSP in out-of-home advertising?

A demand-side platform is the buyer's software. It lets advertisers and agencies plan, target, bid on and report on screen inventory from many media owners in one place. Vistar Media and Hivestack specialize in DOOH; The Trade Desk, Google DV360 and StackAdapt include DOOH alongside other channels.

What is an SSP in DOOH?

A supply-side platform is the screen owner's software for selling inventory programmatically. It sets price floors, decides which buyers can bid, and passes each available play to DSPs. Place Exchange, VIOOH, Vistar and Hivestack all operate DOOH SSPs.

What is a DOOH ad server?

The software that runs the loop on a digital screen. It schedules what plays and when, mixes direct and programmatic ads, and logs proof of play. Broadsign is one of the most widely used; Vistar and Hivestack also offer ad servers.

How much does programmatic DOOH cost?

CPMs typically run about $5 to $15, with an average around $7.62 in late 2024. Roadside digital is around $8, airports around $14. Managed campaigns often have $10,000 to $50,000 minimums, while self-serve tools start much lower.

Is programmatic DOOH better than buying billboards directly?

Not always. Programmatic is better for multi-market campaigns, audience targeting and flexible flights. Buying direct is usually simpler and cheaper per play for a local business that wants specific boards for months.

What is an impression multiplier?

An estimate of how many people see one play on a screen. Because a single billboard play is seen by many people, programmatic DOOH multiplies each play by that number to calculate impressions and cost.

Keep learning

Sources

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