As a platform, Hubzilla holds a tremendous amount of versatility and depth in what it can do. Mike Macgirvin, the platform’s creator, has famously quipped that the system does not have a commercial analogue to draw comparisons to — it’s not just a social network, it’s not just a forum, it’s not just a cloud storage solution, and it’s not just a content management system.
According to the definition on the project website:
Hubzilla is a powerful platform for creating interconnected websites featuring a decentralized identity, communications, and permissions framework built using common webserver technology.
(...) Hubzilla is best suited towards people who want to host their own websites that can also act as a cloud storage provider as well as a decentralized social communication platform. It is meant for the homesteaders of the Internet generation, people who want to withdraw from third-party services and data providers.