Messages are stored on the server only until the recipient comes online. Once they connect, a 30-second timer starts — after that the message is permanently deleted from the server. There’s no copy left server-side after that point. Since private chats use E2EE, the server only ever sees ciphertext anyway. After delivery, messages exist only locally on both devices. If you want no local record either, you can delete the conversation manually from within the app.

Write to @support directly in ONYX, using the search field, and we’ll discuss this in detail.