Faster-than-Light Drives allow a vessel to enter Hyperspace through the use of a wormhole projector. Faster-than-Light Drives are not strong enough to support an intergalactic wormhole. Intergalactic wormholes are usually managed by national (or regional in some cases) governments instead, although intergalactic private wormholes managed by corporations are not unheard of. They are generally powered by Teritoite, although a long time beforehand Essence was indeed used as a power source.
Another, less used FTL drive is the elusive Alubierre drive, which is powered of small quantities of exotic matter, which can be found in large deposits around M31.