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

Smarsh, the Oregon-based owner of TeleMessage, said Monday it was “investigating a potential security incident” and suspended its services out of an abundance of caution.

Researchers uncover security weaknesses in obscure TM SGNL app and indications that its Israeli maker was itself recently breached.