Alternatives to SimpleX Chat

Peer-to-peer video and text chat

Instant messaging application focusing on security

Matrix collaboration client

Voice and text chat software

Messaging app with a focus on speed and security

Native desktop client for WhatsApp

Free messaging and calling application

End-to-end encrypted instant messaging application

Calling and messaging application focusing on security

Onion routing based messenger

Official desktop client for Rocket.Chat

Desktop client for Telegram messenger