The DSP/SSP landscape for DOOH

To buy beauty inventory programmatically, you have to know the plumbing — which DSPs reach DOOH, which SSPs supply it, and how they connect. This map lays out the landscape after the 2025 consolidation, and flags the one mechanic that trips up omnichannel buyers: the big cross-channel DSPs reach DOOH only through negotiated deals, not the open auction.

The two sides

Programmatic DOOH connects demand to supply through the same OpenRTB rails as the rest of programmatic, via two layers:

DSPs (demand side) — where buyers buy. The platforms an agency runs: Vistar, Hivestack/Perion, Broadsign Ads, The Trade Desk, Yahoo, Adform, Google DV360, Adomni. Some are DOOH specialists; some are omnichannel platforms that added DOOH.
SSPs (supply side) — where inventory is offered. Vistar, Place Exchange, Broadsign Reach, VIOOH (JCDecaux’s exclusive SSP), and Perion/Hivestack. These are who a media owner integrates with to make screens biddable.

After consolidation, several of these sit inside the four anchor groups — Vistar (T-Mobile), Hivestack (Perion), Broadsign+Place Exchange, VIOOH (JCDecaux).

The mechanic that catches omnichannel buyers

Here’s the part that surprises buyers coming from display or CTV: the big omnichannel DSPs don’t bid DOOH on the open exchange. Concretely (Google, The Trade Desk — primary):

In DV360, DOOH must be negotiated with the seller, who pushes the deal in via the seller API, validated by the SSP before it reaches buyers. DV360 connects to six DOOH SSPs (Perion/Hivestack, Magnite, Place Exchange, Ströer, VIOOH, Vistar).
The Trade Desk integrates DOOH through named supply partners (Place Exchange, Ströer, VIOOH, DAX, Vistar, Hivestack, Broadsign).

So if you plan to buy salon screens from DV360 or TTD, the inventory reaches you as a deal, not as open-exchange fill — which is consistent with the broader reality that over 95% of programmatic OOH transacts on deal IDs. The “just open it to the exchange” instinct doesn’t apply.

Specialist vs omnichannel plumbing

A structural detail worth knowing: DOOH still runs largely on specialist rails. OOH-specific DSPs handle about 65.5% of programmatic DOOH spend, versus 34.5% for omnichannel DSPs (WOO/PwC — primary). The omnichannel platforms (DV360, TTD) are connecting in and growing, but the DOOH-native platforms (Vistar, Hivestack, Broadsign) still carry the majority. The implication: a buyer wanting deep DOOH reach often works through a specialist DSP, while an omnichannel buyer reaches DOOH as one line in a cross-channel plan — via deals.

What it means for a beauty network

The landscape translates into a clear integration path:

Operators: integrate with one or more SSPs in the anchor groups (Vistar, Place Exchange/Broadsign, VIOOH, Perion) to make salon inventory biddable. That’s how “the infrastructure finds the advertiser” instead of you hunting one by one.
Agencies/advertisers: reach salon inventory through the DSPs you already run, remembering that DV360/TTD get DOOH via deals — so request a curated PMP of salon/spa screens rather than expecting open-exchange fill.
Both: none of it works without correct venue classification — Salon (402) / Spa (403). The plumbing can only route demand to inventory it can identify.

The full buying workflow — deal setup, floors, creative approval — is in Programmatic DOOH via DSPs.