Instant Messengers
AIM
Allo
Blackberry
Messenger
Discord
Facebook
Messenger
GroupMe
Hangouts
HeyTell
ICQ
iMessage
IMO
Instagram
IRC
Jabber/XMPP
Jitsi
– video conferences
Kakaotalk
Kik
Line
Mailingliste
Matrix
/
Riot.im
Mattermost
MMS
MSN
Rocketchat
Secure Scuttlebutt
Signal
Silent
Phone
Skype
Slack
SMS
Snapchat
SOMA
Messenger
Talkatone
Telegram
Threema
Tox
Viber
VKontakte
Voxer
WeChat
WhatsApp
Whereby
Wickr
Wire
Zangi
Safe Messenger
Zoom
– video conferences
Zulip
multi messengers
Ferdi
– Fork of the
Franz
multi messenger bundling lots of web apps in one convenient
Electron
app.
Hamsket
– multi messenger bundling 94 different messaging apps.