Here are the main programmatic digital out-of-home (pDOOH) platforms and programmatic routes that operate in Belgium (SSPs, DSPs/marketplaces and local/self‑service options), with a short note on each and a source you can check:

Major SSPs / global marketplaces

• VIOOH — global premium DOOH supply‑side platform; JCDecaux Belgium’s airport and many other JCDecaux screens are available programmatically via VIOOH. (blog.viooh.com)
• Place Exchange — supply‑side platform used by European media owners (Clear Channel Belgium integrated Place Exchange into its LaunchPAD). (placeexchange.com)
• Vistar Media — programmatic DOOH SSP/technology provider (Clear Channel Belgium has integrated Vistar into its LaunchPAD). (clearchannel.be)
• Broadsign (Broadsign Reach / Broadsign Ads) — global OOH platform and SSP with programmatic capabilities and DSP/marketplace products used across Europe. Broadsign has expanded its European reach (including acquisitions to strengthen EU DSP/DOOH capabilities). (broadsign.com)

DSPs / buy‑side platforms with Belgian coverage or Benelux offices

• Displayce — European DOOH DSP / buying platform with a Brussels/Benelux office and direct integrations (notably JCDecaux); offers self‑service and programmatic buying in Belgium. (displayce.com)
• (Major programmatic DSPs) — many global DSPs (e.g., The Trade Desk, DV360 and other demand partners) connect to the DOOH SSP ecosystem that serves Belgian inventory via the SSPs and publisher tools mentioned above. JCDecaux and other owners explicitly reference multi‑DSP availability. (jcdecauxna.com)

Large Belgian media owners / programmatic access points

• JCDecaux Belgium — large digital inventory across airports, shopping malls, retail entrances and metro; programmatic access via VIOOH and partners (programmatic-enabled screens across Belgium). (jcdecaux-belux.com)
• Clear Channel Belgium — offers programmatic buying through its LaunchPAD (a multi‑SSP setup) and has integrated partners such as Place Exchange, Vistar and Hivestack to open programmatic access to its screens. (clearchannel.be)

Local / self‑service and retail DOOH platforms

• Glooh — self‑service DOOH platform operating in Belgium that gives advertisers direct access to premium networks (including Clear Channel and JCDecaux placements in Belgium). Good option for smaller or local campaigns wanting fast activation. (glooh.co)

Notes & practical points

• Most programmatic DOOH in Belgium is transacted via a combination of (a) media owners’ programmatic tooling/marketplaces (JCDecaux, Clear Channel LaunchPAD), (b) SSPs (VIOOH, Place Exchange, Vistar, Broadsign, Hivestack), and (c) DSPs/buying platforms (Displayce and large DSPs that connect to those SSPs). If you’re buying, you’ll typically work through a DOOH DSP (or a trading desk/agency) that has connections into the SSPs that carry the Belgian inventory you want. (jcdecaux-belux.com)

If you’d like, I can:

• produce a short shortlist (2–3) platform recommendations based on whether you want self‑service vs. agency buying vs. guaranteed inventory; or
• draft an outreach email template you can send to a media owner or SSP to request programmatic access/pricing for Belgium.

Which (if any) of those would you like next?