Zendesk articles
Cloud-Based Call Center Software Market: Genesys, Avaya, Zendesk, Aircal, Ameyo, Five9, CrazyCall, 8×8, VICIdial, Freshcaller, Coztel, CloudTalk, TCN, Bright Pattern
G Suite Business Software Market Report 2020: Zendesk, Salesforce, Mixmax, Streak, Groove, Expensify, Freshworks, Mailtrack.io, NetHunt CRM, Calendly, etc.