XMPP

XMPP is a widely adopted, independent, and privacy-focused messaging standard. Its key features include being free and open for everyone, with no single entity owning it. Developers can integrate their own software using available libraries and APIs. XMPP powers various emerging technologies and is used by millions daily. It offers software for every platform and libraries for every language, making it a versatile and widely applicable standard. Technical implementation details include its open and extendable nature, with engineers actively contributing to its improvement. Specific use cases include messaging, presence, and connecting people and services. A unique differentiator is its independence and open standard, allowing for widespread adoption and integration.