I played this terrific PBM space 4X wargame a long time ago, hosting for a few friends rather than playing against unknowns. Looks like it’s been graphically updated for web browsers but the mechanics look familiar.
My fav feature is that you must establish your own lines of supply, with individual ships, which can therefore be interdicted, by ships being destroyed or even captured (with clever ship design). The races in the game have special abilities and are based upon Star Trek, Battlestar Galactica and Star Wars (e.g Borg, Fed, Empire, Rebels, Cylons etc).
Emphasis is supplying ship production via exploration and combat, rather than politics, complex tech trees or Civilization-type play (as with Stellaris, according to vids - not played).
Can host private custom games with friends.
