There are a number of international and local car hire companies in Nairobi and Mombassa that rent out both cars and 4WD vehicles.

Avis Rent a Car
33 67 04

Budget car hire
65 21 44

Central Rent a Car
22 28 88

Hertz Car Hire
31 36 08

Market Car Hire
22 57 97

Payless Car Hire
65 21 44

Tough Tracks
225935

UTC Car Hire
33 19 73