Vojo

Products

Verification infrastructure for digital out-of-home, modular by design.

  • Platform overviewHow the parts fit together: wrap the creative, read the glass, grade the play.
  • PassportFor everyone. Wrap creative once, verification rides inside. Harvester-compatible by default on fitted screens.
  • HarvesterPatentedOn-glass sensor that produces Proof of Display, independent of the player log.
  • vTrust ScoreOne comparable score from all the proof on a play. Glass proof counts only where a Harvester is fitted, never invented.
  • IntegrationsAPI, webhooks and MCP, pipe verified plays into the exchanges and tools you already use.

See Proof of Display in a report

A sample roll-up of glass-verified plays, the KPI Vojo Harvester™ produces.

View sample report

Solutions

The same verification, applied to the job your screens do.

  • Media ownersSell every slot on evidence: stop giving plays away, hold your rate card, and answer a queried spot with a lookup.
  • Agencies and brandsCheck a campaign across every network it runs on, with one wrap and one comparable score per play, not a different log from each seller.
  • Programmatic platformsFor SSPs, DSPs and exchanges: an independent score on every play, and you decide what clears.
  • Compliance messagingHospitals, pharmacies, transport hubs, venues, councils and workplaces: show a notice was displayed, not just sent.

Resources

Test your own proof, read the guides, look up a term.

  • Check your own proofTick what proves your plays today and see which failures would still go in your report as delivered.
  • One-question testOne question that tells you whether any evidence you're handed is independent. Ours included.
  • TTS self-assessmentNine questions for your role on trust, transparency and sustainability, reviewed with our team.
  • DOOH ad verificationWhat your proof can't see, what the gap costs, the four methods compared, and three things to do this week.
  • Proof of Play vs Proof of DisplayA claim versus an observation, and the one test that tells them apart.
  • Trust, transparency & sustainabilityWhat each means on an ordinary Monday, with three questions per pillar to test your own operation.
  • Glossary49 terms across the trade, buying, measurement, delivery and verification, in plain English.
  • All resourcesEvery tool, guide and reference in one place.

See what a verified report looks like

A vTrust Score on every play, the evidence behind it, rolled up by screen and site.

View sample report
Check your proof
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For compliance-critical screens

Your notice was sent. Prove it was seen.

When an inspector asks whether the visiting rules were on the screen in ward 3 last Tuesday, a schedule isn't an answer.

Passport reports from inside every notice. A Harvester checks the glass on the screens that matter most. Vojo keeps the record for every screen, site and hour.

Book a demoCheck your evidence →

Patented Proof of Display · Granted in the UK and US

Screen
Ward 3, entrance
Notice
Visiting rules
Window
Tuesday, 09:00 to 17:00
Illustrative example

On the glass, across the day

09:0011:0013:0015:0017:00

Notice seen on the screen Screen dark, 13:10 to 13:45

Plays of the visiting rules notice either side of the dark period, with the evidence for each
PlayPassportNotice renderedHarvesterSeen on the glassvTrust Score
12:58:04 Passport Harvester91
13:04:04 Passport Harvester92
13:10 to 13:45Screen dark. Passport reported each play, the Harvester reported the screen off, so these plays score LOW.
13:46:04 Passport Harvester90
The same record rolls up by screen, by site and by any window you choose.
Sent is not seenYour evidenceWho it's forQuestions

Sent is not seen

Every one of these goes in your records as displayed.

A schedule and a player log report from inside the system. Neither looks at the screen.

  1. 01

    The screen was dark

    Switched off, unplugged or rebooting. The schedule still says the notice ran.

  2. 02

    It froze on an old frame

    Last month's visiting hours, held on the panel for days. The player log still says the new one played.

  3. 03

    No signal, wrong input

    The panel showed a blue screen or a TV channel. Nothing in your signage system can see that.

Ask yourself

What would you hand an inspector today?

Tick the evidence you keep. See which of five questions about one screen, one day, you could actually answer.

What evidence do you keep today?

What evidence do you keep today?

Tick everything you could hand over.

The reviewer asks about one screen, one day

5 of 5 you couldn't answer for certain.

4 of those only if someone happened to be looking at that moment.

  • Was the screen switched on? Sometimes
  • Was it showing the current notice, not an old one? Sometimes
  • Was the picture moving, not frozen? Sometimes
  • Was there a picture at all, not “no signal”? Sometimes
  • Did the notice stay up for its full slot? No answer

Who it's for

Any screen with a message someone may ask about

Audits, inspections, insurers, complaints and incident reviews all end at the same question: could people see it?

  • Healthcare

    Hospitals and GP surgeries

    Infection control, visiting rules and safeguarding notices in waiting rooms, wards and entrances.

  • Healthcare

    Pharmacies

    Notices for patients at the counter and in the waiting area, where showing what was on display can matter.

  • Public safety

    Transport hubs

    Safety and emergency notices on concourses and platforms. After a disruption, the first question is what passengers were told.

  • Public safety

    Venues

    Safety, entry and evacuation messages for crowds, before and during an event.

  • Public service

    Local councils

    Public notices and service information in libraries, receptions and community buildings.

  • Workplaces

    Sites with staff and visitors

    Health and safety information, site rules and visitor briefings on reception and canteen screens.

What you’re buying

  • Vojo Passport™Rides inside the notice on every screen: which notice ran, where, and whether it finished.
  • Vojo Harvester™On the screens that matter: was it actually on the glass? Always ships with Passport.
  • vTrust Score™A record per play you can pull for any screen, site or time window when someone asks.

Questions

Questions compliance teams ask

Do we have to change our signage player or CMS?
No. Vojo is verification only. It doesn't schedule, publish or play your notices; your existing CMS and player keep doing that. Passport travels inside the notice as a standard HTML unit, and a Harvester sits on the screen itself, so nothing in your playback setup has to change.
Will this evidence satisfy our regulator or inspector?
We can't tell you what a particular inspector, auditor or insurer will accept; that's a question for your compliance lead. What Vojo gives you is evidence for a specific screen and time: that the notice rendered and, where a Harvester is fitted, that it was on the glass, read from outside the system that sent it. That's a much stronger thing to hand over than a schedule.
Do we need a Harvester on every screen?
No. Passport confirms the right notice rendered on every screen it plays on. Add a Harvester where you need to show the notice was physically visible: usually the few screens where a missing notice would matter most. A Harvester always ships with Passport, never on its own.
What happens when a screen goes dark or freezes?
Where a Harvester is fitted, the record shows it. Passport still reports that the notice ran. If the Harvester reports the screen off, those plays score LOW. If the screen is on but the notice can't be read on the glass, as with a frozen frame or the wrong input, a sensor with a good record caps those plays at MEDIUM. A missing read can also mean a sensor fault, so it never counts as proof on its own. Where no Harvester is fitted, Passport can't see the panel and the play scores on what Passport reported. That's why the screens where a missing notice matters most are the ones to fit.

Vojo is also for

  • Media ownersSell every slot on evidence: stop giving plays away, hold your rate card, and answer a queried spot with a lookup.
  • Agencies and brandsCheck a campaign across every network it runs on, with one wrap and one comparable score per play, not a different log from each seller.
  • Programmatic platformsFor SSPs, DSPs and exchanges: an independent score on every play, and you decide what clears.

Compliance messaging

Sent is a claim. Seen is evidence.

Have the answer ready before anyone asks: which notice, which screen, which hour and, where a Harvester is fitted, what was actually on the glass.

  • Works with your CMS and player
  • ·Proof from the glass where it matters
  • ·Patented Proof of Display
Book a demoSee a sample report

20 minutes. Live panel or sample report. Plain answers.

Vojo

Display with Confidence.

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Products

  • Vojo Passport™
  • Vojo Harvester™
  • vTrust Score™
  • Integrations
  • Sample report

Solutions

  • Media owners
  • Agencies and brands
  • Programmatic platforms
  • Compliance messaging

Resources

  • Check your own proof
  • One-question test
  • TTS self-assessment
  • DOOH ad verification
  • Proof of Play vs Proof of Display
  • Trust, transparency & sustainability
  • Glossary
  • All resources

Company

  • Book a demo
  • Request pricing
  • Partners
  • Contact

© 2026 Vojo Media · Patented proof of display · UK & US

Vojo's Proof-of-Display technology is protected by granted patents in the United Kingdom (GB2583366, GB2597434) and the United States (US 12,176,999), with a European patent application pending.

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