Xerox
Yes, both Chatter and Brosix offer a Free Trial.
Chatter is designed for Large Enterprises, Medium Business and Small Business.
Brosix is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Brosix begins at $4/User/Month when Billed Yearly, while pricing details for Chatter are unavailable.
Some top alternatives to Chatter includes mi.team, Yammer, Jamespot, Convo, talkspirit, Dialog, Speakap, SecOne, Brosix and Icebreaker time!.
Some top alternatives to Brosix includes mi.team, Slack, Glip, Output Messenger, Dialog, Office Chat, TIMU, imBee, ChatBlazer and Teamwork Chat.