the Psi team

The Psi team maintains a single, long-standing open-source instant messaging client built squarely on the Jabber/XMPP protocol. Psi is engineered for users who want a lightweight, standards-compliant messenger that plugs into any public or private XMPP service without vendor lock-in, advertising, or feature bloat. Typical use cases include secure team chat inside corporate or university networks, privacy-focused one-to-one conversations protected by OMEMO and PGP encryption, and low-overhead participation in multi-user chat rooms and IRC-style channels. The interface stays deliberately minimal, offering tabbed conversations, grouped roster management, file transfers, voice calls, and extensive theming, while plug-ins let administrators add custom stanzas, transports to legacy networks, or integration with ticketing systems. Because the code is GPL-licensed, security researchers and community contributors regularly audit and patch it, making Psi a common choice for journalists, system administrators, and European public-sector agencies that must comply with data-sovereignty rules. Cross-platform builds for Windows, macOS, and various Linux distributions share a unified configuration, so roaming users can copy a single folder and resume encrypted sessions instantly. The publisher’s software is available for free on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always installing the latest upstream release and allowing batch installation alongside other open-source communication tools.