Element

Built on the Matrix protocol, Element provides default end-to-end encryption for chats and files, ensuring user privacy and data security across federated servers as highlighted in its secure decentralized messaging features.

Offers a unified experience on web browsers and as an Electron desktop app, with active support for major browsers and OSes, as detailed in the supported environments tiers for desktop and web.

Supports voice/video calls, stickers, reactions, and bridges to other platforms, enabling versatile communication tools beyond basic messaging, evidenced by the rich media and integrations in the key features.

Allows full control over deployment with configurable settings and theming, empowering organizations to host their own instances and customize the interface, as mentioned in the self-hosting and customization options.

Actively maintains internationalization through community translations and supports diverse browsers, demonstrated by the Localazy badge and commitment to accessibility in the project description.