[skinkestek]

> and the builds of the clients that are published to the app stores could be anything.

Isn't Telegram one of very few that provides verifiable builds, (including on iOS if you root it)?

I might be wrong but I think not.

Edit, see : https://core.telegram.org/reproducible-builds

So it seems even on this point Telegram shines.

[saagarjha]

Telegram doesn’t even post their source code to match their releases on macOS and iOS. Sometimes they’ll do a code dump somewhere around that time, but it’s not a guarantee.

[skinkestek]

In the same boat as Signal there.

WhatsApp doesn't post source code at all.