Slack - A messaging app for teams who see through the Earth!
Yac - Take your time back from Zoom & Slack
Teamwork - The Project Management App for Professionals. The most powerful and simple way to collaborate with your team.
Beseda - Async video and audio messaging for remote teams
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.