Vestial Imperium

An A.I. based empire adjacent to the Galactic Alliance.
The A.I. calls itself Imperitron, but has only communicated with anyone outside the Imperium through intermediates.

Vestum Major is its capital, and presumably a planet.

Vestum Minor is a massive starbase on the border of the Imperium and the Galactic Alliance.

It has seeded a number of worlds with self-expanding factories that produce mechanoids.
Most of the citizens are organic life, who were either conquered or joined the Imperium for the technological support and other benefits.