The news comes from a community post which cites the growing request for such servers, with the team working to support this request,
“As Sea of Thieves has grown we’ve been supporting some of these initiatives in the background, helping people get together on the same server to save on that initial setup time for our community events, but we’ve always harboured a desire to do more. We have been working for a while on formalising this support, and in the near future we’re going to bring an early Alpha version of Custom Servers to Sea of Thieves as a tool for selected creators and community groups to utilise for community events.”
To that end, these custom servers will be tested in a live environment as part of an alpha. Key features of these servers include the ability to set up a custom adventure server, customize your ship numbers and ship types, generate a code to share the server for anyone to join, no gold or reputation progression.
The testing will begin with Insiders first, and then slowly rolling out. Rare notes that these servers cost money to run. They haven’t explicitly stated a price, but expect there to be one, with Rare explaining that these servers will be optional from the Emporium.