There are 3 main types of hosted phone / UCaaS providers:
1. Started off Premise based, migrated to cloud later.
Respected household names such as Cisco, Avaya, & Mitel (purchased Shoretel). These companies set the standard for office phone systems and have since made the migration to cloud based.
2. Platform Based
These providers leverage a base platform that is then developed and tweaked to their desired requirements; think Android made by Google, and Samsung as the end product.
There are two main platforms; Broadsoft & NetSapiens.
On top of Broadsoft for example, providers such as Nextiva, AT&T, West, and TPX have created their solution.
3. Born in the cloud
These providers have a current offering that was 100% born in the cloud.
These companies include RingCentral, 8×8, Dialpad, Fuze, and Vonage.
No matter which direction you choose, the #1 usually comes down to integration; which provider will be able to integrate best into your work environment.
CRM, ERP, Contact Center, ITSM