How to Distribute all my available rooms across many sites – including my own website. All inventory is automatically updated across all sites when a booking is made PMS Bellebnb is a hotel management platform that includes a PMS, Channel Manager, Booking Engine, Concierge Service, and Payment Processor. Our platform will help you sell more rooms and improve revenue per booking by helping you upsell products and services, and encourage guests to return and book with you directly.