It supports 15 networks at the moment, including iMessage, Google Chat, Discord, Facebook Messenger, Instagram, Slack, WhatsApp, LinkedIn, Twitter/X, and Telegram. All messages are encrypted and messages from other chat networks that support encryption are re-encrypted.
Beeper’s interface
The experience doesn’t exactly sound smooth. For starters, for iMessages, Beeper uses the Apple ID information to sign in as you on a Mac mini which is used as a server for relaying messages to and from your inbox. This could lead to you receiving a few messages about someone else using your account.
Other than that, not all functions are available and occasionally, you might need to go back to original apps for some advanced features.