Sigma DomainApps
Some things are easier to use than to describe — a map, a floor plan, a route. Sigma Domain hosts those as real web apps. You decide who can open each one: just you, the people you invite, anyone with the link, or the public.
Running today
Privacy is a setting, not a category. Each app — each individual map or tour — carries its own access level: open to the public, open to anyone with the link, or restricted to people who sign in and have been invited. You can publish one tour for the world and keep the site search next to it visible only to your team.
What doesn't change is where the data lives. Whatever an app reads and writes stays in the database belonging to whoever owns it, so a restricted app isn't a public page with a login bolted on: someone who hasn't been invited doesn't get a permission error, there's nothing addressed to them at all. Something you're still evaluating stays off the public web and out of search results until you decide otherwise.
Not yet
In development
The hosting layer that runs maps and tours is built and in production. What isn't finished is the path for you to deploy your own app onto it — authoring and publishing an app is still an internal process, not a self-serve one.
We'd rather say that plainly than imply a button that doesn't exist. If an app of your own is something you need, tell us what you'd build — it shapes what we finish first.