Local Vs Hosted Mode

You can use Jupiter in two primary ways - hosted or local.

Hosted mode is what you get when you go to the webapp. The Jupiter company is hosting a central install of the Jupiter software, and manages all the user accounts, infrastructure, data, etc. to make this happen. Your workspace is in the cloud. Since it's on the web, you can access it from everywhere, and every one of your devices. This is the simplest and most convenient way to use Jupiter.

Local mode is what you get when you download the CLI app and run it on your own computer. Your workspace lives on your machine, and is not accessible from anywhere else. Nobody else has access to your data, and you can take control of infrastructure needs yourself. This is an advanced/niche way of using Jupiter, but I'm committed to making this thing work well too.