Signal Private Messenger, the encrypted messaging app, just got a notable feature upgrade that tops WhatsApp, at least in terms of numbers.
Thanks to a new service that was developed in-house, Signal now supports up to 40 participants on an end-to-end-encrypted group video call, while WhatsApp is stuck at a maximum of eight.
"There is no off-the-shelf software that would allow us to support calls of that size while ensuring that all communication is end-to-end encrypted, so we built our own open source Signal Calling Service to do the job," wrote Signal's Peter Thatcher (opens in new tab) in a company blog post yesterday (Dec. 15).
The rest of Thatcher's post gets into the technical details, which we'll leave out here. (As Signal is an open-source project, the code for the Signal Calling Service (opens in new tab) is available on GitHub for anyone's use.)
But as Android Police's Manuel Vonau (opens in new tab) points out, Signal could support only five participants when the service added group video calls a year ago, so this is a huge ramp-up.
It certainly leaves WhatsApp in the dust, as that Facebook-owned — sorry — Meta-owned service can handle only eight end-to-end-encrypted video-call participants at once. Both are way ahead of Telegram, which is slowly rolling out group video calls that have a current limit of 30 participants but are not end-to-end encrypted.
That means that while the video-call transmissions are encrypted between each participant and Telegram's servers, Telegram can still see what's going on.
WhatsApp and Signal, on the other hand, can't — because the call content is visible only to persons on either end of the transmissions.
If you don't mind the possibility that the hosting service might be able to see what you say online — and provide recordings to the authorities, if warranted — then Telegram is a fine option, given that it has so many other features to offer. But if you'd rather not anyone else know your business, then Signal or WhatsApp it will have to be.
Check out our list of the best encrypted messaging apps for more information.