NON-BOSCH SX Motor
Mahle
Alternatives to the BOSCH SX motor are primarily the Mahle motor found on both Specialized and ORBEA eBikes.
The Specialized bikes use a modified Mahle on the crank, and the ORBEA uses a rear hub motor system.
These motors produce around 35Nm of torque.
FAZUA
German company FAZUA produce a lightweight 60Nm crank motor, examples of which are the UBN range of eBikes from Riese & Muller.