Yes, both Microsoft 365 and Yammer offer a Free Trial.
Microsoft 365 is designed for Large Enterprises, Medium Business and Small Business.
Yammer is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Microsoft 365 begins at $6/User/Month, while pricing details for Yammer are unavailable.
Some top alternatives to Microsoft 365 includes CollaborateCloud, Zoho Connect, ClickUp, Workplace, Microsoft Teams, Google Workspace, Dropbox Business, Microsoft OneDrive for Business, Google Admin Console, WPS Office and Outlook.
Some top alternatives to Yammer includes Interact, Interact Software, MyHub Intranet Software, Creative Social Intranet, Attollo Intranet, Oak Engage, Engynn Intranet and OneWindow Workplace.
