Fossify Messenger is your trusted messaging companion, designed to enhance your messaging experience in various ways.
- Instant Messenger
- Free • Open Source
- Android
- F-Droid
- Android Tablet
Revolt is a user-first, privacy focused chat platform.
- Instant Messenger
- Free • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Rust
- Flathub
- F-Droid
- GitHub
+5Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook.
- Email Client
- Free • Open Source
- Mac
- Windows
- Linux
- Flathub
- Chocolatey
+10Mattermost is a secure, open source platform for communication, collaboration, and workflow orchestration across tools and teams.
- Group Chat App
- Freemium • Open Source
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- JavaScript
- Go (Programming Language)
- Cloudron
+1An open-source decentralized and encrypted messaging app even without internet connection via Wi-Fi and Bluetooth. Messages are stored securely on your device, not in the cloud. Connect directly with nearby contacts - no Internet access is required.
- Instant Messenger
- Free • Open Source
- Mac
- Windows
- Linux
- Android
- Flathub
- F-Droid
All your services in one place, built by the community.
- Instant Messenger
- Free • Open Source
- Mac
- Windows
- Linux
- PortableApps.com
- Flathub
- Snapcraft
Station is the first open-source smart browser for busy people. A single place for all of your web applications.
- Application Launcher
- Free • Open Source
- Mac
- Windows
- Linux
- Microsoft Edge
- Google Chrome
- Brave
+1Threema is a 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.
- Instant Messenger
- Paid • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- HUAWEI AppGallery
- iPad
- F-Droid
HexChat is an IRC client based on XChat for Linux , but unlike XChat it’s completely free for both Windows and Unix-like systems.
- IRC Client
- Free • Open Source
- Windows
- Linux
- BSD
- PortableApps.com
- MacPorts
- XQuartz
RetroShare is a open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using OpenPGP to authenticate peers and .
- Video Calling App
- Free • Open Source
- Mac
- Windows
- Linux
- Android
- BSD
- OpenSSL
- OpenPGP
+2Zulip is the only modern team chat app that is designed for both live and asynchronous conversations. Zulip topics create a separate space for each discussion, so different conversations will never get in each other's way.
- Instant Messenger
- Free Personal • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- BSD
- iPad
- Self-Hosted
+4It is the brand new, and fastest ever, Matrix client. It is for personal and community use, and will support enterprise functionality later this year.
- Instant Messenger
- Free • Open Source
- Android
- iPhone
- Android Tablet
- iPad
Free and secure calls and messages to anyone, anywhere.
- Video Calling App
- Freemium • Proprietary
- Mac
- Windows
- Android
- iPhone
- Android Tablet
- HUAWEI AppGallery
- iPad
- Android Wear
- Samsung Galaxy Store
Offers high-quality video conferencing and screen sharing, supporting up to 100 interactive participants with features like whiteboard collaboration.
- Video Calling App
- Freemium • Proprietary
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Apple Watch
- Apple Car Play
- Android Auto
- Apple TV
- Android TV
+8Delta 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.
- Instant Messenger
- Free • Open Source
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Snapcraft
- Flathub
- F-Droid
+1