[gggtt]

Telegram stores everything. You can send GBs videos and it will be stored and downloadable on any device from anywhere. It's like on a Dropbox or Drive. This costs a lot of money.

On the other hand, I think Signal doesn't store anything once it has been delivered and any backup will have to be made on separate via some DropBox or Drive.

So the cost should be far far less than Telegram

[sorenjan]

So Telegram stores files at a cost of a few hundred million dollars each year? It sounds a bit unbelievable that a big majority of their operating cost is simply storage, but I really don't know. Anyway, sounds like a great feature that others should have as well.

[GekkePrutser]

Signal does store stuff if you have desktop clients logged in. It doesn't rely on the mobile client to forward it like Whatsapp Web. But it only stores it until they have all retrieved it, or they have timed out. I don't know how long Telegram keeps stuff.

[newscracker]

Desktop client or phone client or tablet client, Signal will store the messages on its servers for several days or until they’re delivered, whichever is earlier.