this post was submitted on 26 Oct 2025
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I've been using Signal and Teleguard, but not Threema because it's a paid app. Which one is the most secure?

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[–] Multiplexer@discuss.tchncs.de 3 points 1 month ago (1 children)

This depends on your scenario.
You can use a comparison chart to find suitable fits.

Threema and Signal are both ok, Teleguard in general doesn't look like a trustworthy option.

[–] Larryx@lemdro.id 1 points 1 month ago (1 children)

Yes, Signal and Threema have great encryption, and Teleguard is not as popular but it is anonymous and from Switzerland.

[–] Multiplexer@discuss.tchncs.de 2 points 1 month ago* (last edited 1 month ago) (1 children)

It's mainly about Teleguard apparently being completely closed source and using an unknown proprietary encryption protocol.
Personally I would omit it based on this and use it only for non-sensitive stuff if completely omitting were not possible.

[–] Larryx@lemdro.id 2 points 1 month ago

Yes, Teleguard is not particularly reliable, even though it is owned by Swisscows, a company that has its own search engine and secure alternatives to Google. Furthermore, Teleguard is not that old; it was launched in 2021.