Yes, both Google Chat and Office Chat offer a Free Trial.
Google Chat is designed for Large Enterprises, Medium Business and Small Business.
Office Chat is designed for Medium Business and Small Business.
Pricing for Google Chat Starts at $6/User/Month whereas for Office Chat Starts at $20.75/Month when Billed Yearly.
Some top alternatives to Google Chat includes Microsoft Teams, Slack, Glip, MeetSpace, Output Messenger, ChatWork, Trillian, Dialog, Office Chat and Teamwork Chat.
Some top alternatives to Office Chat includes Google Chat, Output Messenger, Trillian, Dialog, imBee, Pumble, Takle, TelebuPing, Microsoft Kaizala and ICQ.