Cost / License
- Free
- Open Source (AGPL-3.0)
Application typeApplication types
Platforms
- Android
- F-Droid
Signal-FOSS Alternatives
Alternatives list
89 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
253 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
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
158 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
212 FluffyChat alternativesEncrypted 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
179 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
166 Conversations alternativesConversations 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
78 Keybase alternativesKeybase 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
207 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
