We make Listo, so read this with that in mind. Every HotSOS detail below is based on Amadeus's public product pages and the HotSOS Mobile app store listings at the time of writing, as of October 2026.

Listo vs HotSOS capabilities, as of October 2026

Read across the rows and the split is plain. The HotSOS software family is organized around hotel departments: engineering, housekeeping, front of house and the hotel management roles that report on them, from the general manager to the director of rooms. Listo is organized around the moment a request is made and the minutes until someone owns it.

What is HotSOS? It is the core product in Amadeus's Service Optimization family, which Amadeus sells as hotel operations software. Amadeus's own site and the app store listings also call it a Hotel Service Optimization System. The family has three products.

• Amadeus HotSOS, the full platform, with advanced task automation, scheduled maintenance, mobile access, inspections, hotel guest management and access to more than 200 API integrations, PMS included.
• HotSOS Housekeeping, which adds housekeeping automation: room assignments, a real-time view of room inventory, and room assignment within labor regulations by credits, minutes or surface area.
• HotSOS Select, an edition designed for select-service properties, with digital inspection checklists, step-by-step scheduled work orders, meter readings and equipment health checks.

Hotel service optimization, in Amadeus's framing, means organizing the behind-the-scenes work so guests feel the result. Its pages describe real-time dashboards of team and individual productivity, scheduled equipment and preventive maintenance orders, scalable inspections, a delivery orders feature that creates several guest amenity requests at once, and guest profiles that flag returning guests and special occasions. HotSOS connects to a range of PMS systems and can also run without one.

The footprint is large. Amadeus says its Service Optimization solutions support hotel properties in 175 countries and have been used by more than 683,000 hotel staff members.

Pricing is not published. A property requests a demo or more information from an Amadeus sales specialist.

HotSOS Mobile is how staff carry the system on a phone or tablet, and it is a work order tool more than a guest request tool. Its app store listings describe role-based access that notifies staff of waiting service orders, shows the details, lets them create new orders and run guestroom or public-space inspections, and gives department heads a way to manage operations away from the desk.

Picture an engineer on the fourth floor who gets a notification for a slow drain in room 412, opens the order and works it from the HotSOS app. A supervisor inspects the next room on the same device, no clipboard. Amadeus also markets multilingual support, so team members can manage tasks in their preferred language.

HotSOS Mobile is listed on both Apple's App Store and Google Play, where it shows more than 100,000 downloads as of October 2026.

The practical difference from Listo is where a request starts and what it lands on. HotSOS Mobile runs on phones and tablets for staff. Listo also delivers requests to a Samsung Galaxy smartwatch, so a cabana server can accept one with a tap on the wrist while carrying a tray, and the guest who started it never downloaded anything.

Listo does one job: it moves a service request from the person who needs something to the person who can do it, and proves it happened. The request can come from a staff member on a phone, tablet, desktop or smartwatch, or from a guest who scans a QR code in a room, cabana or suite with no app download.

1. Smart Dispatch routes the request to the assigned and available team member.
2. That person accepts with the green check or declines with the red X, so ownership is never a guess.
3. When the job is done, they mark it Complete, and the record feeds exportable analytics on response times, request patterns and high-demand areas.
4. If nobody answers, reminders go out and the request escalates to management.

Pricing starts at $29.99 per active user per month, with unlimited locations, QR codes, task requests per location and admin logins. In hotels, guests can request room service or housekeeping, and pool guests can ask for towels or drinks with a scan, as the Listo for hotels page describes.

The results come from named customers. At Great Wolf Lodge Niagara, which runs 24 private cabanas in an 80,000-square-foot water park, Listo reports a 30 percent increase in cabana service revenue and a 9 percent increase in guest average spend, per the Great Wolf Lodge case study. At TD Garden, operated by Delaware North, Listo reports 1,472 completed guest requests across 90 premium suites in 6 months, at an average response time under 5 minutes.

We have a 4.6 rating of five for satisfaction. We have a great response time, anywhere between a minute and two minutes. This system, Listo, really did just kinda clean up all of our deficiencies with our cabana service.Eric Van Bussel, Director of Food & Beverage, Great Wolf Lodge Niagara

What Listo does not do matters as much. It is not a work order system or a CMMS, it does not run preventive maintenance programs or room inspections, and it is not a PMS. It also runs well outside hotels, in stadiums, arenas, amphitheaters and corporate campuses.

The clearest way to compare service request management in the two products is to follow one request through each. Take a 3 PM check-in wave at a 400-room resort. A family in room 1418 needs a crib and two extra towels, and the front desk line is six deep.

In a HotSOS hotel, Amadeus's public pages describe guest request management handled by staff rather than a guest-facing request page, so in this example the agent who takes the call creates a service order. Task automation assigns and prioritizes it, the assigned attendant sees it on HotSOS Mobile, and the order carries into reporting. The strength is the record. The crib request sits beside the room's work orders, inspections and housekeeping status, and guest profile tools can carry preferences into the next stay.

In a Listo hotel, the family scans the QR code in the room and picks the crib and towels from a service menu in the browser. Smart Dispatch sends the request to the available attendant assigned to that floor, who accepts it on a smartwatch between rooms. If nobody accepts, reminders fire and a manager is alerted. The strength is speed, plus a timestamped trail from the scan to the knock on the door.

Neither path is wrong, and they answer different questions.

HotSOS gives the property a deeper, hotel-shaped record of every order. Listo removes the phone call and the relay between the guest and the person doing the work, which is where much of the waiting can build up on a sold-out Saturday.

HotSOS is the better tool when the problem is the whole hotel operation rather than the speed of one request. Choose HotSOS if you need:

• One hotel-native system of record across engineering, housekeeping and front of house, with service orders, inspections and reporting together.
• Preventive maintenance and scheduled equipment work, including step-by-step work orders, meter readings and health checks.
• Dedicated hotel housekeeping software for room assignments, real-time room inventory and room credits within labor regulations, which Listo does not attempt.
• Guest profiles that carry preferences, returning-guest flags and special occasions to the team.
• A brand fit: Amadeus says Marriott approved HotSOS Housekeeping for its properties, and HotSOS connects to a range of PMS systems.

If your hardest hour is room readiness after an 11 AM checkout surge, HotSOS housekeeping tools are built for exactly that. For the engineering side of the same decision, see our maintenance & engineering tools compared. We would not pitch Listo as a substitute for any of this.

Listo is the right tool when requests get logged and then wait, or when the building is not a hotel at all. It sits at the lighter end of our hotel task management software guide, starting with QR codes and devices staff already carry, with no complex infrastructure change. Teams comparing hotel task management software against a full operations suite should ask which problem they are actually solving.