Hubble creates a private instance of Farcaster on your machine. It peers with other instances and downloads a copy of the entire network. Messages uploaded to your Hubble instance will be broadcast to the network.
We recommend running Hubble if you are building an app, need access to the latest data or want to help decentralize the network.
Hubble instances can also be hosted for you by other service providers.
The Farcaster team runs an instance of Hubble for use by the public. This isn't guaranteed to be stable, and is read-only for now.