Here are the top digital out‑of‑home (DOOH) platforms and networks to consider in Belgium, grouped by type with a short note on when each is best:

Major Belgian DOOH networks (best for direct inventory, national reach, transit/retail):

• JCDecaux Belgium — extensive digital estate across shopping centres, metros, retail entrances and Brussels Airport; strong retail and transit inventory. (jcdecaux-belux.com)
• Clear Channel Belgium — large national footprint (street, stations) with a multi‑SSP programmatic gateway (LaunchPAD). Good for broad, high‑frequency campaigns. (clearchannel.be)
• Bauer Media Outdoor (Adshel / Billboard Live / Station Live) — strong street and station DOOH coverage (1000+ screens), audience measurement and guaranteed audience solutions. Good for street/station dominance and measurement. (bauermediaoutdoor.com)

Programmatic supply / marketplaces & ad‑tech (best for programmatic buying, dynamic creative, data targeting):

• VIOOH — premium global DOOH SSP/marketplace used to buy JCDecaux airport and other premium inventory programmatically. Good when you want programmatic access to premium airport/retail screens. (blog.viooh.com)
• Place Exchange — programmatic OOH SSP that’s expanding access to Belgian inventory (partnered with Clear Channel and others). Good for integrating DOOH into DSP workflows. (placeexchange.com)
• Vistar Media — programmatic DOOH platform used by local agencies and media owners for audience targeting in Belgium. Useful for audience‑driven pDOOH campaigns. (vistarmedia.com)
• Hivestack / Perion (programmatic DOOH tech) — independent programmatic DOOH platform with global integrations; used to power programmatic buys and targeting. (future.hivestack.com)
• Broadsign (DSP/SSP & supply tooling) — major digital signage/DOOH platform in Europe (acquisitions and DSP integrations), useful where you need publisher tech and programmatic connectivity. (broadsign.com)

How to choose (short guidance)

• If you need nationwide, high‑reach street/station coverage → prioritize Clear Channel or Bauer Media Outdoor. (clearchannel.be)
• If you need premium transit/airport or retail screens → JCDecaux (Brussels Airport, malls, Carrefour/Delhaize installs). (blog.viooh.com)
• If you want programmatic buying, audience targeting, or real‑time dynamic creative → buy via VIOOH, Place Exchange, Vistar, Hivestack or Broadsign through your DSP (The Trade Desk / DV360 / MediaMath etc.). (blog.viooh.com)

Practical next steps

1. Define objective (brand reach, footfall lift, retail conversions, or data‑driven targeting).
2. Pick 1–2 networks that match the environments you need (e.g., JCDecaux for airport/retail; Clear Channel/Bauer for street/stations). (blog.viooh.com)
3. If you want programmatic/dynamic creative, request inventory access via Place Exchange, VIOOH, Vistar or Hivestack and integrate with your DSP. (placeexchange.com)
4. Ask each provider for audience measurement, proof points (CIM/Pulse studies), and available data triggers (weather, time, store stock, mobile audience). (bauermediaoutdoor.com)

If you want, I can:

• draft a short RFP/email template to send to network sales teams, or
• compare 2–3 selected providers (inventory, CPMs, targeting options, reporting) if you tell me your campaign goals and budget.