What are some alternatives?
When comparing Pingpad for Slack and Kahootz, you can also consider the following products
Sharepoint Online - SharePoint is a secure place to store, organize, share, and access information from almost any device.
Collavate - Collavate is a collaborative workflow and document management suite that runs on Google Drive.
Ryver - Ryver provides all of your team communications in one place: chats, posts, and files.
Scalix - Scalix provides email, group calendaring and other collaborative software that enables users to reduce cost of ownership.
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Amazon WorkSpaces - Amazon WorkSpaces is a managed desktop computing service in the cloud.