WhatsApp, Slack, Google Chat, Discord, Rocket.Chat, Telegram, Wickr, Signal, Skype, Mattermost, Pidgin, Session, Kosmi, Freenet, I2P, Online Video Call, TeleGuard, Xabber, SiskinIM, Spectrum Chat, Axolotl, Dialog Messenger, Walkie, Neochat, aTalk, Zulip, Priority Matrix, Crust Enterprise Messaging, Plumm, Empathy, Gitter, Librem Chat, A-Chat.org, Daily Co, palava.tv, Graph Messenger, Zoho Cliq, Revolt , JayPad, Telegram X, ZeroChat, VideoMeeting, Openfire, Team.video, Olvid, Corteza Messaging, Skred, Spez Empathy, Steam Chat, monocles chat, Carrot.io, XMPP, SimplyVideo, Quill Messaging, ejabberd, Conversations, Mini WA+, Guilded, ArrowChat, Chanty, Databag, Gajim, dirc, GBWhatsapp, FluffyChat, Lifesize Video Conferencing, Element X, Cryptocat, Ripcord, Workchat, Mirotalk, Bettergram Messenger, Anonymous Messenger, Messenger for WhatsApp, Async, Videolify, GNUnet, Snowflake Tor, Engage Spaces, FireRTC, Prosody, Microsoft Kaizala, Skype Lite, Safe Text, uShare.to, Ziggs, LeggoChat, IPZN, Wispi, KeeperChat, Proxy Mask, HipChat, INNCHAT, Beagle IM, Crugo, Braid Chat, cabal, zoro.im, TeamTalk.io, LekkerIM, ejabberd SaaS, Sblack, Intraboom, TribeScale, Slenke, JANDI, Actor Messenger, Mi Airit, HelloChat, Adamant Messenger, Hyphen Messaging, Tigase, Skarpline, Fractal, Fuse Chat are some alternatives to Matrix.org.