Public sites as of October 2026. Listo bills per active user. Zello Enterprise is priced by quote.

What is Zello? In its own words, it is "a modern and customizable walkie-talkie app (and more) that lives on any smart device." A worker presses one large button, speaks, and everyone in the channel hears the message as it arrives, even when the screen is showing something else. The Zello app runs on iOS, Android, Windows and Mac, and the company's homepage claims 10 billion messages per month and 5 million monthly active users.

Based on Zello's public site at the time of writing, the product covers six areas:

• Channels: unlimited channels of up to 7,000 users each, plus one-to-one talk, broadcast channels and roles that set who can talk and who can only listen.
• Replay and records: missed messages can be replayed on any plan, and Plus adds transcription and Message Vault, which keeps records for up to two years.
• Emergency alerts: on Plus and Enterprise, one touch sends an alert, the worker's location and the first 10 seconds of audio to a chosen response team.
• Hardware: Zello sells no devices, but its partners offer rugged phones, push-to-talk buttons, speaker mics and discreet earbuds for guest-facing staff.
• Requests: QR Assist lets someone scan a posted code that plays a pre-recorded audio alert in a channel, and Zello Kiosk puts a help button on a touchscreen tablet on the Enterprise plan.
• AI: on the Plus plan, transcription, live voice translation, AI digests and an assistant named Ella that answers staff questions from company knowledge.

Zello also connects to existing radios through gateway partners, so a security team can keep its handhelds while everyone else talks from phones. For a building that has already paid for a radio fleet, that is a real advantage.

How does Zello work when the building fills up? Much like a radio, with a phone as the handset. The exchange is half-duplex: one person transmits while the rest of the group listens, which is how push-to-talk works on any two-way system. The difference is reach. The Zello walkie talkie app runs over Wi-Fi or cellular data, so the range is the network, not the antenna, and messages recorded offline send once a connection returns.

Picture a 300-room hotel at 3 PM. Check-in is stacking up, and the front desk keys the housekeeping channel to ask whether 412 is ready. A room attendant on the fourth floor hears it through an earbud, answers in two seconds, and the guest gets a key. Nobody typed anything. For that exchange, voice is the fastest tool there is.

The same channel shows where voice runs out. At 3:20 PM a guest in 1108 asks for extra towels, the desk relays it, and three attendants hear it. Each assumes one of the others has it. Replay means the words are not lost, yet nobody owns the request until someone claims it on air. Zello can show that a message was received, but not whether the towels ever arrived.

Zello's QR Assist narrows that gap for scanned requests by adding an accept step. Its public pages describe the accept, not a completion record or an owner chosen by availability.

Zello Dispatch Hub, included on every plan, queues incoming calls for available dispatchers, a model built for a dispatch desk more than a floor of attendants. On an open channel the trade-off holds: excellent at reaching everyone, weak at assigning anyone.

Listo skips the voice and goes straight to the request. It is not a walkie talkie app and carries no live audio. A staff member taps a request, or a guest scans a QR code with no app download, and Smart Dispatch sends it to the assigned and available team member instead of to a channel. Here is a suite request at a 7 PM puck drop:

1. A suite guest scans the QR code in the suite and asks for a server.
2. Listo routes it to the attendant assigned to that suite, on a Samsung Galaxy smartwatch, phone or tablet.
3. The attendant accepts with the green check, or declines with the red X so the request moves on.
4. Once the order is delivered, the attendant marks it Complete.
5. If nobody answers, Listo sends reminders and then escalates the request to management.

Every step lands on a real-time dashboard of pending, in-progress and completed requests. The data exports as response times, request patterns, high-demand areas and staff performance, which is the record a director of operations needs to staff the next event. A spoken request never becomes an object with a status, so a channel cannot produce that record. Guest pagers share the same gap, covered in pagers vs Listo.

Listo allows unlimited locations, QR codes and task requests per location, so a code can sit on every suite, cabana and concession stand. Staff can also send tasks or messages from any device.

Zello is the right tool when the job is talking, not tracking. Choose it when your team needs to:

• Reach a whole department, or the whole building, with one button during an incident, a weather hold or an evacuation.
• Coordinate a load-in, a changeover or a parking operation where crews talk constantly and no single request needs a ticket.
• Send a one-touch emergency alert with location to a security or medical team.
• Move off aging radios onto phones staff already carry, while keeping some handhelds on a radio gateway.
• Hear a message in another language, or catch up on a missed call through replay and transcription.

Many managers start by asking: is Zello free? The consumer app, Zello Friends & Family, is free, but Zello's support site calls it non-commercial and says using it for commercial purposes violates its Terms of Service. Zello Work, the business product, has a 14-day free trial with no credit card. After that, as of October 2026, Core costs $6.80 per user per month billed yearly or $8.00 billed monthly. Plus costs $12.75 billed yearly or $15.00 monthly and adds Message Vault, panic buttons, transcription and the AI tools.

We make Listo, and we would still send a team whose main gap is voice toward a push-to-talk product like Zello.

Listo is the right tool when the problem is a request that gets said and then lost. For a venue weighing radio replacement, the honest framing is that Listo takes routine service traffic off the radio rather than replacing the radio itself, and radio replacement costs compared prices both stacks line by line. Listo starts at $29.99 per active user per month.

Premium service is where the difference shows. Before Listo, suite guests at TD Garden relied on call buttons or verbal requests. Listo reports that Delaware North reached an average response time under 5 minutes and 1,472 completed guest requests in 6 months across 90 premium suites, per the TD Garden case study.

The right Zello alternatives depend on which job Zello was doing for you. Venue and hotel teams usually weigh four kinds of tools:

• Two-way radios, which keep working radio-to-radio when Wi-Fi and cellular fail. That is why many security and medical teams keep them.
• Another two way radio app, which covers the same voice job as Zello. Compare price per user, device support and radio gateway options.
• Frontline messaging apps, which suit shift updates and announcements better than a live request that needs an owner in the next five minutes.
• Tap-to-request platforms such as Listo, which route each guest or staff request to one person and track it to completion, without live voice.

In a stadium the split tends to be clean. Security, medical and event control stay on voice, while premium suites, concession restocks and facilities calls move to requests. Listo reports 0 missed restock orders at American Family Field, operated by Delaware North, where the venue had faced 40 to 50 hours of operational downtime per season before Listo. Listo for stadiums & arenas shows how suites and concessions use it.

Hotels follow the same logic at a smaller scale. Engineering and security keep a voice channel, and requests from rooms, the pool and cabanas go to a tracked task. At Great Wolf Lodge Niagara, where a manual flag system had been missing cabana requests, Listo reports 1 to 2 minute response times across 24 private cabanas.