WhatsApp is a free app for simple, secure, reliable messaging and calling with friends and family worldwide.
Telegram describes itself as a fast, simple, and free messenger that syncs across devices, with an emphasis on security and speed. Its official site highlights features like large group chats and broad platform availability.
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WeChat is a messaging and social app that supports chats and calls and is used by over a billion people.
Google Chat
Google Chat is a secure messaging and collaboration tool for teams, included with Google Workspace.
LINE
LINE is a communication app that lets you send messages and make free voice/video calls.
Messenger
Messenger is a place for meaningful conversations that helps you connect with friends, family, and communities.
Zoom
Zoom is a collaboration platform with tools like video meetings and team chat to help people connect.