Here’s a concise overview of the main digital out‑of‑home (DOOH) platforms and operators active in Belgium, grouped by type so you can quickly see who owns inventory vs. who provides programmatic/tech access.

Media owners / inventory operators (national & local networks)

• JCDecaux Belgium — large street, transit, retail and airport digital estate; offers programmatic access for premium inventory (Brussels Airport, malls, metro, retail). (jcdecaux-belux.com)
• Bauer Media Outdoor (formerly Clear Channel Europe / Clear Channel Belgium) — national digital street, station and roadside networks (Adshel Live, Billboard Live, Station Live); active in programmatic via LaunchPAD and SSP partnerships. (clearchannel.be)
• blowUP media (part of Ströer) — premium large‑format LED DOOH “Frontline” sites in Antwerp, Brussels, Ghent, Knokke, etc. (blowup-media.be)
• DOOH‑tv / mall networks — operator of digital screens and kiosks in shopping centres (mall DOOH inventory). (quividi.com)

Programmatic marketplaces / SSPs / DSPs (platforms to buy DOOH)

• VIOOH — global premium DOOH marketplace used by JCDecaux and other owners for programmatic buys. (blog.viooh.com)
• Vistar Media — programmatic DOOH supply‑side platform used to expose Belgian inventory to DSPs. (clearchanneleurope.com)
• Place Exchange — programmatic SSP for OOH; integrated with Clear Channel/Bauer LaunchPAD in Belgium. (placeexchange.com)
• Hivestack — independent programmatic DOOH ad‑tech (SSP/DSP) active in Benelux/Belgium and used for weather/data‑triggered activations. (clearchannel.be)
• Displayce — European programmatic DOOH buying platform with a Brussels/Benelux presence and inventory connections (including JCDecaux). (displayce.com)
• Broadsign — global DOOH platform/CMS that powers inventory management and programmatic connections for many publishers. (broadsign.com)

Buy‑side partners / resellers / local DSPs

• Glooh (and other local resellers/DOOH specialists) — local demand platforms/resellers that aggregate inventory across the Belgian networks for advertisers/agencies. (glooh.co)

Measurement & tech vendors commonly used in Belgium

• Quividi — audience measurement/analytics for DOOH (used by Belgian mall networks and others for view/attention metrics). (quividi.com)

Notes / what this means in practice

• Most large Belgian DOOH owners (JCDecaux, Bauer/Clear Channel, blowUP media, mall networks) now offer programmatic access via one or more SSPs/marketplaces (VIOOH, Vistar, Place Exchange, Hivestack, Displayce, Broadsign). That lets buyers use DSPs or resellers to plan, target (time/weather/audience) and measure DOOH campaigns. (jcdecaux-belux.com)

If you want, I can:

• produce a comparison table showing inventory types, approximate screen counts/coverage and programmatic partners for each operator, or
• suggest which platforms to use depending on your objective (brand reach vs. local activation vs. programmatic triggers).