Yes, both Confluence and Office Chat offer a Free Trial.
Confluence is designed for Large Enterprises, Medium Business and Small Business.
Office Chat is designed for Medium Business and Small Business.
Pricing for Confluence Starts at $8.33/User/Month when Billed Yearly whereas for Office Chat Starts at $20.75/Month when Billed Yearly.
Some top alternatives to Confluence includes Jira, Microsoft SharePoint, Google Workspace, GitBook, Zoho Wiki, Drupal Wiki, TWiki, Wiki Valley, XWiki and Team Wiki.
Some top alternatives to Office Chat includes Google Chat, Output Messenger, Trillian, Dialog, imBee, Pumble, Takle, TelebuPing, Microsoft Kaizala and ICQ.
