You can invite someone to Signal using the "Invite Friends" menu in the app, which will send a text message or email.

It means Gmail senders will be able to end-to-end encrypt (E2EE) emails across providers, for example, if sending from Gmail ...

Microsoft is investigating a known issue that triggers Outlook errors when opening encrypted emails sent from other organizations. According to a recently published support document, this issue ...

You can mark any message as unread on Signal in the Android and iPhone versions of the secure-messaging app.