What are some alternatives?
When comparing Pingpad for Slack and Ryver, 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.
Slack - A messaging app for teams who see through the Earth!
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Podio - Podio is the online work platform. Manage, share, and get your work done smarter together with tools that work like you. Free for 10 Users.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Huddle - Huddle | The Enterprise Content Collaboration Platform