Telegram is an extreme security risk for its users, its developers and operators, holding data and metadata for over a billion people on central servers!

Our decentralized zero-metadata messaging approach is diametrically opposed to such big-platform designs https://delta.chat/en/2026-03-31-zero

But there is more: #chatmail relays are zero-state: you can wipe the relay's disks, create a new fresh setup, and users just continue chatting. Operators have actually done this. An *actually* state-less server :)