Facebook Messenger Alternatives for Online

Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.

Hangouts is an instant messaging software developed by Google.

WhatsApp Messenger is an instant messaging platform owned by Facebook.

Trillian is a proprietary multiprotocol instant messaging application.

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc.

Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser clients.

ICQ is an open source instant messaging software.

Fleep enables communication within and across organizations, be it your team chats, project communication or 1:1 conversations.

Jitsi Meet is an open-source (Apache) WebRTC JavaScript application that uses Jitsi Videobridge to provide high quality, scalable video conferences.

GroupMe is a mobile group messaging app.

Zulip is a chat and collaborative software.

Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.

Dasher Messenger provids a way to message friends.