In our 33-criterion evaluation of CCaaS providers, we identified the 10 most significant ones — 8x8, Amazon Web Services (AWS), Aspect, Cisco, Five9, Genesys, Lifesize (formerly Serenova), NICE inContact, Talkdesk, and Vonage — and researched, analyzed, and scored them. This report shows how each provider measures up and helps application development and delivery professionals select the right one for their needs.