It stores all message data exclusively in volatile RAM, ensuring that no logs are retained and messages are automatically erased when the server is powered down or restarted. This ephemeral storage, combined with client-side quantum-resistant end-to-end encryption and default traffic routing over the Tor network, enhances user anonymity. Additionally, Amnesichat includes defenses against traffic analysis, operates efficiently on cheaper hardware, and supports group chats with pre-shared keys.
Source code: https://github.com/umutcamliyurt/Amnesichat
Not to mention they blackmail people who run secure messaging services to give them back doors.
Happened twice as far as I can remember.