The clone, TeleMessage, was the subject of a reported hack in which the contents of some direct messages and group chats were stolen.

An unidentified miscreant is said to have obtained US government communications from TeleMessage, a messaging and archiving app based on the open-source Signal app and used by ousted national security advisor Michael Waltz. TeleMessage, which was acquired by Oregon-based Smarsh in 2024, says it's shut the app down for now.

TeleMessage lets users archive their chats in secure messaging apps. However, the hacker reportedly found that TeleMessage’s archived chat logs aren’t end-to-end encrypted, allowing them to access the contents of certain messages, government official contact information, and login credentials for the service’s backend.