Here are user-friendly digital out‑of‑home (DOOH) advertising platforms, grouped by who they suit best and with a quick note on why each is worth checking. I’ve included recent sources so you can follow up on features, inventory and self‑service options.

Self‑serve / easiest for small businesses or first-time buyers

• Adomni — simple, self‑serve DOOH marketplace with campaign setup aimed at SMBs and small agencies (credit‑card payment, lower/minimums and quick launches). (globenewswire.com)

Programmatic DSPs & buyer platforms (best for agencies and data‑driven campaigns)

• Vistar Media — established DOOH DSP and planning tools that aim to simplify planning and visualize how ads appear in the real world. Note: Vistar was announced for acquisition by T‑Mobile in January 2025, which may affect how its platform is packaged or offered going forward. (globenewswire.com)
• Broadsign (OutMoove/Outreach) — DOOH adtech for both buyers and publishers: programmatic buying, campaign control, and analytics from a widely used DOOH vendor. Good for multi‑market scaling. (broadsign.com)
• Hivestack (now part of Perion) — full‑stack programmatic DOOH SSP/DSP capabilities focused on precision targeting and global inventory. Useful if you want programmatic scale. (future.hivestack.com)

Supply‑side marketplaces / exchanges (good when you want broad inventory across owners)

• VIOOH — premium global DOOH supply‑side marketplace connecting buyers to large media owners and international inventory. (blog.viooh.com)
• Place Exchange (PlaceX) — independent DOOH SSP that added Programmatic Guaranteed support to simplify direct, guaranteed buys across multiple publishers. Good for predictable, premium buys across owners. (placeexchange.com)

How to choose a user‑friendly platform

• Start with self‑serve if you want quick, low‑friction campaigns (Adomni and other smaller marketplaces). (globenewswire.com)
• For scale and programmatic targeting, pick a DSP/marketplace with broad inventory and clear reporting (Vistar, Broadsign, Hivestack/Perion, VIOOH). (globenewswire.com)
• Look for: easy UI and creative upload, transparent pricing and minimums, inventory maps, real‑time reporting and verification, and programmatic options (RTB or guaranteed deals).
• Check recent company news (acquisitions, integrations) before committing — these change product roadmaps and integrations (example: Vistar/T‑Mobile). (reuters.com)

Suggested next steps

• Try a demo or request a trial dashboard from 2 platforms (one self‑serve, one programmatic) to compare UI and reporting.
• Ask for an inventory map and audience measurement options (footfall, impressions, attribution).
• Run a small test buy to validate creative specs, delivery and reporting before scaling.

If you want, tell me: your budget, campaign length and target geographies (US nationwide, one city, malls, transit, grocery, etc.), and I’ll recommend 2–3 specific platform choices and the next concrete steps (how to set up a test campaign and what creative specs you’ll need).