Lacuna Expanse

The Lacuna Expanse is a region of space with millions of habitable worlds. You can play with or compete against thousands of players as you build your empire, fight off spies in a battle for cold war supremacy, form alliances, search the expanse for lost ancient artifacts, and more.

https://us1.lacunaexpanse.com/#referral=6a5a982f-dd3f-3499-9efe-e3079cbb5aa6

From FB: 
the game is almost 4 games in one... Build and explore, trading and interacting with other people, playing a cold war type of spying game, and fighting with potentially HUGE fleets, between you and AI's, or some human protagonist.