ChatPoint - SharePoint add-in for on premises/Online is available as a free, fully featured 15-day trial (1xSite License with an unlimited number of end users).
ChatPoint is a comprehensive solution designed to help organizations to allow their employees to communicate to each other within organization.
It will keep all your data inside SharePoint and will encrypt all communication messages as well.
There is no separate login required for users as it will automatically take current logged in user by default on the page where it has added as a webpart.
ChatPoint has a one-time payment pricing model, once you purchase you will have free access to all future updates.
Complete ChatPoint demo for both designs are available here.
If you have any questions, email us at: email@example.com