Superlifters are relatively small Culture ships with large and powerful engines. Superlifters described as being 90% engine are mentioned in Excession, faster even than a Rapid Offensive Unit (or Very Fast Picket) over short distances. Superlifters were never militarised as a class, though they are described in Matter as often having served on the frontlines of the Idiran War, including being equipped with weapons.

They are mainly used as high-speed shuttles between Culture Systems Vehicles, for example when it is inconvenient for the larger ships to decelerate, as movers of raw materials for building Orbitals or other space habitats, and for providing other Culture ships with a 'boost' to aid in rapid deceleration or acceleration.

Known classes are:

Cliff Class
Delta Class
Stream Class