Briefing is described as 'The preservation of privacy is the main driver for this project. Secure technologies, such as WebRTC, are used to establish a direct connection between the participants' and is an app in the Office & Productivity category. There are more than 100 alternatives to Briefing for a variety of platforms, including Online / Web-based, Windows, Android, iPhone and Mac. The best alternative is Element. It's not free, so if you're looking for a free alternative, you could try Discord or Jitsi. Other great apps like Briefing are Skype (Freemium), Jitsi Meet (Freemium, Open Source), Tox (Free, Open Source) and Wire (Free Personal, Open Source).
With Viber, everyone in the world can connect. Freely. More than 460 million Viber users text, make HD-quality phone and video calls, and send photo and video messages worldwide over WiFi or 3G - for free.
Google Meet is a team-focused videoconference app included with G Suite and G Suite for Education. You can join a meeting using your browser, share your video, desktop, and presentations with teammates and customers.
Cross-platform - Get closer to everyone you love with simple, high-quality video calling on iOS and Android. Make one-to-one calls - See who’s already available to connect on Duo or invite a friend to join.