A fork of Signal for Android with proprietary Google binary blobs removed. Uses OpenStreetMap for maps and a websocket server connection, instead of Google Maps and Firebase Cloud Messaging.
Threema Alternatives
Threema is described as 'New mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that only you and the intended recipient can read your messages' and is a very popular instant messenger in the security & privacy category. There are more than 100 alternatives to Threema for a variety of platforms, including Android, iPhone, Windows, Mac and Linux apps. The best Threema alternative is Signal, which is both free and Open Source. Other great apps like Threema are Telegram, Element, Tox and WhatsApp.
Alternatives list
Real-time chat platform structured with threads, custom feeds, project tagging, and AI moderation. Provides privacy controls, instant file and code sharing, multiple viewing modes, moderator tools, light/dark modes, and unifies collaboration for organizations and communities.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Mac
- Windows
- Linux
- Slack

Quaternion is a cross-platform Qt5-based desktop IM client for Matrix, a reference desktop application using libQMatrixClient. Source code, issue tracker, roadmap etc. can be found at GitHub. Releases (with links to cross-platform source code archives, as well as binaries for...


Technitium Mesh is a secure, anonymous, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using cryptography and anonymity using Tor network.

Cost / License
- Free
- Open Source
Application types
Platforms
- Android
- F-Droid


+5
twinme messenger protects your identity & intimacy: no information to identify you and your contacts; relationships under your full control are private, non-transferable.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Android
- iPhone
- Android Tablet
- iPad


+3
Ricochet Refresh is the new updated version of Ricochet, supported by Blueprint for Free Speech.. We are a non-government, not-for-profit organisation working to safeguard the freedom of expression for whistleblowers, activists, and everybody else, worldwide.





+1
- 128 Xabber alternatives
Open source Jabber (XMPP) client with multi-account support, clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android .
Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Online
- Android
- F-Droid


+1
monocles chat is a fork of blabber.im and Conversations with some changes, to improve usability.


+5
- 163 Librem Chat alternatives
End-to-end encrypted chat, VOIP, and video calling used by millions of people.
Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid


+1
Tinfoil Chat (TFC) is a FOSS+FHD peer-to-peer messaging system that relies on high assurance hardware architecture to protect users from passive collection, MITM attacks and most importantly, remote key exfiltration.
Cost / License
- Free
- Open Source
Platforms
- Linux

































