Cost / License
- Free
- Open Source
Application types
Platforms
- Android
- F-Droid
Simphone is described as 'Secure and private open source peer-to-peer Instant Messenger' and is a instant messenger in the social & communications category. There are more than 50 alternatives to Simphone for a variety of platforms, including Linux, Windows, Mac, Android and iPhone apps. The best Simphone alternative is Signal, which is both free and Open Source. Other great apps like Simphone are Telegram, Element, Discord and Pidgin.
Provides video conferencing with high-quality video and screen sharing, supporting up to 100 participants, real-time whiteboard collaboration, group messaging, and VoIP. Compatible across devices including smartphones and PCs, offering flexibility for remote meetings.




Keybase is a new and free security app for mobile phones and computers. For the geeks among us: it's open source and powered by public-key cryptography.



Delta Chat looks and feels like other popular messenger apps, but does not involve centralized control, tracking or selling you, friends, colleagues or family out to large organizations. "Privacy by Design" has never been more fun.




Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].




Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.




Adium is a free and open source instant messaging application for Mac OS X, written using Mac OS Xs Cocoa API, released under the GNU GPL and developed by the Adium team. Based on the libpurple protocol library, Adium can connect you to any number of messaging accounts on any...


The preservation of privacy is the main driver for this project. Secure technologies, such as WebRTC, are used to establish a direct connection between the participants. The website that provides the web application and mediates the communication stores as little data as...


An alternative Telegram client based on TDLib, with higher speed, slicker animations and experimental features.



Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network. Berty is a privacy-first messaging application built on top of the Berty Protocol.



Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.





