Signal

Signal says messages and calls cannot be accessed by Signal or third parties because they are end-to-end encrypted.

Signal says it is designed to never collect or store sensitive information beyond what is needed to deliver the service.

The service keeps message content on user devices rather than inside a broad vendor-readable cloud archive.

Signal cannot stop message content from being exposed after export, screenshots, unlocked devices, or user-managed backups.

Phone-number registration, contact discovery, and user devices remain practical privacy considerations outside encrypted message content.

Signal says it cannot sell, rent, or monetize user data or content in any way.

End-to-end encryption keeps message and call content out of ordinary sharing paths.

Signal says it uses only the minimum information needed to deliver the service.

Local device data, optional backups, and contact/address-book behavior are still outside Signal's server-side protection model.

Signal says it is designed to never collect or store sensitive information for ordinary service use.

Signal says it does not track users, profile them for ads, or monetize their content.

Core message content stays out of any server-side behavioral advertising model.

Signal message content is stored locally on the user's device and not accessible to the service.

Users can permanently disable registration and remove their number from being recognized as a Signal user.

Deleting Signal and discontinuing use ends the service relationship without leaving a large readable cloud archive behind.

Device backups and user-managed local storage still determine how long some content survives outside Signal's servers.

Users control disappearing messages, registration lock, and device-level protections.

Signal says users can manage personal information in the app's settings.

Users can choose whether and how to handle local backups and contact discovery.

Privacy still depends on endpoint security and the behavior of other conversation participants.