Cost / License
- Free
- Open Source (AGPL-3.0)
Application typeApplication types
Platforms
- Android
- F-Droid
Signal-FOSS Alternatives
Signal-FOSS is described as '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' and is a instant messenger in the social & communications category. There are more than 50 alternatives to Signal-FOSS for a variety of platforms, including Android, Mac, Windows, Linux and iPhone apps. The best Signal-FOSS alternative is Signal, which is both free and Open Source. Other great apps like Signal-FOSS are Telegram, Element, Matrix and Tox.
Alternatives list
88 Delta Chat alternativesProvides a chat experience over email, with all messages and contacts stored on user devices, open source code, group media support, and compatibility with any provider. No central servers, no tracking, works without SIM, and can be used by anyone just via email.
Cost / License
- Free
- Open Source (GPL-3.0)
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Snapcraft
- Linux Mobile
- Flathub
- F-Droid
- OpenAPK
Germany
EU
+1
252 Zulip alternativesThreaded group conversations combine live and asynchronous messaging, separating topics for organized collaboration, supporting open-source, cloud, and self-hosted deployments, secure communication with encryption, and multi-platform access for diverse teams.
Cost / License
- Free Personal
- Open Source (Apache-2.0)
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- BSD
- iPad
- Self-Hosted
- F-Droid
United States
+4
157 RetroShare alternativesOpen source, decentralized platform enabling encrypted chat, secure voice and video calls, anonymous file sharing with swarming, censorship-resistant forums, channels, link sharing, and offline messaging. Uses OpenPGP and OpenSSL for robust privacy and security.
Cost / License
- Free
- Open Source
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Android
- BSD
- OpenPGP
+2
38 Fossify Messages alternativesFossify Messenger is your trusted messaging companion, designed to enhance your messaging experience in various ways.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Android
- Android Tablet
- F-Droid
- OpenAPK
India
Encrypted messenger supporting multi-platform access, unlimited group and private chats, file and voice message sharing, decentralized operation, open-source code, custom themes including dark mode, advanced moderation, push notifications, and no advertisements.
Cost / License
- Free
- Open Source (AGPL-3.0)
Application typeApplication types
Platforms
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Snapcraft
- Matrix.org
- Flathub
- Ubuntu Touch
- F-Droid
Switzerland
+4
176 Rakuten Viber alternativesOffers secure messaging with end-to-end encryption, unlimited free calls, group chats for up to 250 members, rich media sharing, emoji reactions, AR lenses, self-destruct messages, affordable international calls, community channels, and robust privacy across devices.
Cost / License
- Freemium
- Proprietary
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- HUAWEI AppGallery
- iPad
- Android Wear
- Samsung Galaxy Store
Japan
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].
Cost / License
- Free
- Open Source (GPL-3.0)
Application typeApplication types
Platforms
- Android
- Android Tablet
- F-Droid
- Germany
- EU
+4
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.
Cost / License
- Free
- Open Source (BSD-3-Clause)
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Ruby
- JavaScript
- Tor
- Go (Programming Language)
- Java
- United States
82 Linphone alternativesLinphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.
Cost / License
- Free
- Open Source
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
France- EU
+7
206 Messenger alternativesProvides comprehensive communication features including group video calls, voice calls, fast messaging, photo sharing, and location mapping. Access through mobile and web platforms with real-time notifications, ensuring seamless interactions using multimedia tools.
Cost / License
- Free
- Proprietary
Application typeApplication types
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Android Auto
- Meta Quest
- Kindle Fire
- Chrome OS
- United States
153 Trillian alternativesTrillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped as text messages on your phone.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Blackberry
- iPad
- Software as a Service (SaaS)
- United States
+2
