InStream CRM - Business relationship management platform - CRM alternative
EasyCall Phone Call Center - Instantly provide voice customer support through phone calls.
Zendesk Sunshine - Open, flexible CRM platform built on AWS
Voiptime Cloud Call Center - Cloud call center & telemarketing solution
Onesheet CRM - The Simple CRM for Google Sheets
Daily.co for Intercom - Free video calls & screen shares embedded in Intercom