What are some alternatives?
When comparing Kahootz and Huddle, you can also consider the following products
Collavate - Collavate is a collaborative workflow and document management suite that runs on Google Drive.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Scalix - Scalix provides email, group calendaring and other collaborative software that enables users to reduce cost of ownership.
Samepage - Easy to setup collaborative tool and file syncronization cloud application
Amazon WorkSpaces - Amazon WorkSpaces is a managed desktop computing service in the cloud.
MangoApps - Founded in 2007, MangoSpring transforms the way teams work together.