What, family trip ?

In that case, you should definitely check out https://findycar.com/car-rental-iceland/ . It's a special service for Car Rental Iceland, which brings together all the offers from large and reliable rental companies. You can choose any class of car: from economy to minivans or SUVs for the whole family. The system shows availability, prices, insurance conditions, and even additional options such as GPS or child seats. I especially like that you can compare several options at once, book online, and receive confirmation by email — it saves a lot of time. We used Car Rental Iceland last year, and the trip was organized perfectly: no surprises on site, the car fully matched the description, and the whole family was satisfied with the comfort and convenience of travel.