- ADAMANT Messenger, Crypto Wallet & Exchange
- Briar
- Chatsecure
- Chatango.com
- Confide – Your Confidential Messenger
- Conversations- the very last word in instant messaging
- Cwtch- Decentralized, Surveillance Resistant Infrastructure
- Gab.com
- Delta Chat
- Dust: The World’s Most Secure Messenger
- Element
- FreeNode
- Gitter — Where developers come to talk
- Jami
- Linphone – open source VoIP SIP softphone – voice, video and instant messaging
- Mailfence Jabber Chat
- Matrix.org
- Matrix Chat
- Q-municate – Quickblox
- Remind
- Riot Chat
- Sense Chat
- Signal
- Silence
- Surespot
- Telegram Messenger
- Tox
- Utopia P2P Ecosystem
- Wickr Security
- Wire
- WireChat.com
- xx messenger