Vroom Vroom, Green Motion, and Mayjo Car Rentals are some examples of car hires at the Malta Airport. Most of these will require you to put a deposit to cover any damages that may occur because of you.
There are numerous local choices for car rental / car hires in Malta. The local businesses that offer this service include Drifter Car Rental, Active Car Rental, Holiday Auto and Power Connection Car Hire. The two national chains that operate in Malta are Hertz and Budget.