Find and compare the best hosted PBX providers of the year using this guide. Using the table below, compare hosted PBX service providers by price, features, reviews, and more., Compare the best hosted PBX providers. Get pricing, demos, and ratings from verified user reviews. Narrow down providers to your company size, budget, and specific features., A cloud-based Private Branch Exchange (cloud PBX) is a phone system that delivers advanced calling features and unified communications using Voice over Internet Protocol (VoIP) technology. Cloud PBX systems are hosted by service providers, eliminating costly on-premises hardware since they are billed on a monthly or annual subscription., , , .