Slack, Microsoft Teams, Discord, Rocket.Chat, Viber, Matrix.org, Spectrum Chat, aTalk, Zulip, Priority Matrix, Crust Enterprise Messaging, Plumm, Zangi Business Solutions, Gitter, A-Chat.org, MyChat, palava.tv, Zoho Cliq, Revolt , JayPad, Telegram X, ZeroChat, Hack Chat, Corteza Messaging, Flowdock, Spez Empathy, Carrot.io, Quill Messaging, YakYak, Twake, Mini WA+, ArrowChat, Chanty, Moxtra, Databag, Output Messenger, Utopia, AirSend, dirc, GBWhatsapp, Proficonf, ToTok, Element X, AtomJump.com, qTeams, Ripcord, Pumble, Workchat, Mirotalk, Bettergram Messenger, Glowing Bear, Messenger for WhatsApp, Async, Done Hui, Pychat, Videolify, Engage Spaces, Microsoft Kaizala, Skype Lite, Collabify, Kahla, uShare.to, Ziggs, Total.js Messenger, ChatWork, LeggoChat, fluxday, HipChat, Chat Anywhere, RemoteHQ, Crugo, AVAILO, Braid Chat, cabal, Shrtct, Jaconda, LekkerIM, Sblack, Intraboom, TribeScale, Slenke, JANDI, Tribecube, Actor Messenger, collAnon, Mi Airit, Protonet SOUL, Hyphen Messaging, Skarpline, Mazey, Bopup Communication Server, Typetalk, Zoho Remotely, Fuse Chat, GlobalMeet are some alternatives to Mattermost.