Messenger comparisons must include what happens when a device is lost. Signal offers encrypted messaging, but history transfer and backup depend on platform and configuration. Do not assume an ordinary phone backup contains the chats you expect.
With disposable conversations, test one-to-one and group messaging, media, calls, linked devices, and a phone change. Read Signal's backup and transfer guidance for the current options and recovery-key requirements. Store recovery information separately from the phone and verify a restore before making the old device unavailable.
Compare alternatives on contact onboarding, accessibility, multi-device behavior, and retention needs. Avoid claiming a generic “export” or desktop copy is a complete recovery path. The best private messenger is one the group can use and recover safely.