A comparison site that evaluates secure messaging apps from a security and privacy point of view. It lists apps such as Signal, Threema, Wire, Telegram, and Facebook Messenger, and covers whether each is recommended, company jurisdiction, transparency reports and suggested improvements.
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Adium is a free, open-source instant messaging application for macOS that connects to XMPP (Jabber), IRC and other services. It is a third-party client based on the libpurple protocol library, with tabbed chat windows, themeable message views, macOS Contacts integration and OTR encryption. It is developed by volunteers and released under the GNU GPL.
Altus is an open source project with code, documentation, and setup resources for chat and messaging.
Matrix-based secure messaging app for encrypted team chats, rooms, and federation.
Open source team chat platform for messaging, collaboration, and self-hosted communication.
Signal is a messaging application focused on privacy. Its source page describes end-to-end encryption via the open source Signal Protocol, and support for text, voice messages, photos, videos, GIFs, files, voice and video calls and group chats. It is described as free, with no ads or trackers, and as an independent nonprofit.
Telegram is described as a cloud-based mobile and desktop messaging app with a focus on security and speed. It offers apps for iPhone/iPad, Android, PC/Mac/Linux and macOS, and states that messages are heavily encrypted and can self-destruct.
Bots is a chat, messaging, or community communication tool for web or desktop use.
Communicate with an Android messaging app designed for resilient private communication.
Chat Analytics is an open source project with code, documentation, and setup resources for chat and messaging.
A community-built tool that keeps messaging, productivity, and online services in one place. It lets users add services for quick access, including the same service multiple times for separate accounts, and separate work and private time using workspaces. It also offers a Todo panel, custom services, account-free use, and cloud sync.
Ferdium App is an open source project with code, documentation, and setup resources for chat and messaging.
Fluux is an open source project with code, documentation, and setup resources for chat and messaging.
Fluxer is a chat, messaging, or community communication tool for web or desktop use.
XMPP chat client with encrypted messaging, group chats, and plugin support.
Jam is a chat, messaging, or community communication tool for web or desktop use.
Jitsi Meet is an open source project with code, documentation, and setup resources for chat and messaging.
LeapChat is a chat, messaging, or community communication tool for web or desktop use.
Miranda NG is a chat, messaging, or community communication tool for web or desktop use.
Mirotalk is an open source project with code, documentation, and setup resources for chat and messaging.
Alternative Telegram client with extra interface features and messaging customization options.
otr.to is a chat, messaging, or community communication tool for web or desktop use.
Otr.to is an open source project with code, documentation, and setup resources for chat and messaging.
Profanity is an open source project with code, documentation, and setup resources for chat and messaging.