Virola Messenger is a secure corporate communication and collaboration tool that significantly improves teams' efficiency. It supports a wide range of features for effective communication and collaboration. Apart from standard messaging and video/audio conferencing features, Virola has a Task Board, an issues tracking system, LaTeX and markdown messaging formats, and flexible screen sharing and remote control features.
Virola is self-hosted, which makes it more secure than cloud-based messengers and helps you keep control over your corporate data.