SimpleX Chat
Chat & CommunicationPrivate messenger without any user identifiers
Replaces Signal, WhatsApp
Best Mobile App Chat & Communication for self-hosting
The 10 best Mobile App chat & communication you can self-host, ranked by community traction.
Berty
Chat & CommunicationPeer-to-peer messaging app that works offline
Replaces WhatsApp, Signal
The Lounge
Chat & CommunicationModern, self-hosted web IRC client
Replaces IRCCloud, Slack
Nextcloud Talk
Chat & CommunicationChat, video calls and webinars integrated into Nextcloud
Replaces Slack, Zoom
Delta Chat
Chat & CommunicationDecentralized messenger built on top of email
Replaces WhatsApp, Signal
Briar
Chat & CommunicationPeer-to-peer encrypted messaging that works offline
Replaces Signal, WhatsApp
Session
Chat & CommunicationOnion-routed private messenger with no phone number
Replaces Signal, WhatsApp
Linphone
Chat & CommunicationOpen-source SIP voice, video, and messaging client
Replaces Skype, Zoom
Comm
Chat & CommunicationE2E-encrypted personal-server messaging app
Replaces Discord, Slack
Jami
Chat & CommunicationFully distributed, peer-to-peer encrypted communication
Replaces Skype, Zoom
No apps match these filters.
Every option here is open-source and self-hostable, tagged Mobile App within the chat & communication category. Compare them on the individual app pages for setup difficulty and resource requirements.