iGMS vs Rentals United

Where iGMS and Rentals United actually differ

• •iGMS publishes per-listing pricing ($14/listing/mo Lite, $18/listing/mo Pro, $1/booked night Flex with $20/property minimum) with self-serve signup. Rentals United is quote-only across Pro (5–99 properties), Business (100–499), and Enterprise (500+) — HotelMinder lists a third-party figure of €107/mo paid yearly for 10–19 properties, but the vendor doesn't confirm any dollar figure.
• •Rentals United is a distribution layer designed to sit behind an existing PMS — its PMS partner roster includes Guesty, Hostfully, Track, Escapia, MEWS, Streamline, and Hostify. iGMS is a standalone PMS itself, automating guest messaging, reviews, and cleaning across 90,000+ listings without requiring another platform underneath.
• •Rentals United markets 'Certified API connections to 50+ channels' and '90+ listing channels total' including niche OTAs and metasearch. iGMS focuses on Airbnb, Vrbo, and Booking.com with ~40+ integrations — narrower coverage but the three OTAs that drive the majority of US STR revenue.
• •Rentals United exposes a documented public REST API at developer.rentalsunited.com and reviewers consistently call the API 'absolutely phenomenal.' iGMS's public API documentation is not prominently available, and integration depth is more limited.
• •iGMS scales down to a single listing with hours-to-days self-serve onboarding. Rentals United's small-portfolio path is a contact-sales 'We can still help!' link with no self-serve onboarding for sub-5-property operators.

Common objections

Rentals United reaches 90+ channels and iGMS only does three — am I leaving bookings on the table?

Only if you actually distribute beyond Airbnb, Vrbo, and Booking.com. Those three channels drive the majority of US STR revenue, and iGMS covers them with deep automation around messaging, reviews, and cleaning. Rentals United's breadth matters for established managers selling into niche European OTAs, metasearch surfaces, and long-tail platforms — typically a 50+ listing multi-market operation. For a 2–20 listing portfolio booked through the big three plus direct, the extra 87 channels are optionality you won't monetize.

Rentals United has a phenomenal API and iGMS doesn't document a public one — doesn't that matter?

If you're building custom integrations, syncing data into a warehouse, or layering Rentals United behind a custom-built ops stack, yes — its open REST API is a genuine differentiator. If you just want guest messaging, review automation, and cleaner coordination handled out of the box for 2–20 listings, iGMS solves the operational pain directly without you needing API access. API depth is decisive for technical operators and irrelevant for most owner-operators.

Rentals United integrates with Guesty, Hostfully, Track, Escapia, and MEWS — doesn't that make it more flexible than iGMS?

It makes it different, not more flexible for your situation. Rentals United is a distribution layer that assumes you already run a PMS — running it standalone is the wrong shape. iGMS is the PMS itself, bundling messaging, reviews, and cleaner coordination so you don't need a separate operational platform. If you've already invested in Guesty or Track and just need broader channel reach, Rentals United plugs in cleanly. If you're a small-to-medium operator who doesn't want to run two platforms and pay two bills, iGMS is the simpler answer.