Market Study
Google Duo
USPs of Google’s approach
Optimized for low-bandwidth
End-to-end encryption by default
Based on phone numbers allowing users to call someone from their contact list
Automatically switches between WI-FI and cellular networks
A "Knock Knock" feature lets users see a live preview of the caller before answering.
It lets users worldwide make audio-only calls.
Optimization is further achieved through the degradation of video quality through monitoring network quality
Users can leave messages up to 30 seconds long for contacts who are unavailable. These messages can then be viewed by the other party, with the option of calling afterward
Cons of Google Duo
Maximum 12 participants allowed currently.
Technologies used by Google Duo
WebRTC
QUIC over UDP
WaveNetEQ (For packet loss concealment), a generative model based on DeepMind/Google AI’s WaveRNN
Facebook Messenger
USPs of Facebook messenger
Fun masks, effects, and filters on top of the video
User limit of 50
Facebook Live with Co-broadcasting
VR Chat – video calls in Oculus
Technologies used by Facebook Messenger
WebRTC
MQTT for Signalling
Microsoft Teams
Microsoft Teams, both for regular browsers and their Teams App relies on WebRTC for audio and video communications.
References
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