Alternatives to Zalo

Calling and messaging application focusing on security

Voice and text chat software

Free messaging and calling application

Instant messaging application focusing on security

Native desktop client for WhatsApp

Messaging app with a focus on speed and security

Instant messaging tool

Messaging and calling application

Universal chat app powered by Matrix

Desktop client for Telegram messenger

Team messaging, video meetings, and business phone

Teamwork app by Alibaba Group