There are many websites that offer car rental comparisons in the US. The best rated website that I have found is www.priceline.com.
Some sites that offer comparisons of car rental companies are kayak.com. I like to go on this site because not only does it compare flights, hotels and car rentals. It really helps if you are saving money.
There are a few really great options to explore car rental comparisons. Travelocity has a car rental link that provides comparisons and helps you to find the best deal on car rentals. There are also a few websites designed specifically for rental comparisons such as www.carrentalexpress.com/compare and www.vroomvroomvroom.com.
www.rentalcars.com/UK-Car-Rental are the best rental cars in UK, you can book them at their website. another rental car company is the http://www.europcar.com, they offer variety of offers.
Enterprise car rental is running many promotions currently. According to their website, they will even pick you up.
Someone can find a budget car rental in Calgary by going to the Expedia website. The website offers a number of travel services such as helping people find budget car rentals.
The website "Car Rental Express" (http://www.carrentalexpress.com), offers a rental car in Florida from $ 68.49 per day, taxes and additional fees are not included.
http://www.carrentals.com/ is a good site that is unbiased towards all of the car rental companies. You can compare and contrast features, offers and prices from all of the major car rental companies.
Check the AAA website, as they are currently providing a number of offers on car rentals, which means you would be able to get a rental at a discounted price.
Coupons for Avis car rental service are found on their website. Another way is by getting offers if you have signed up and have rented at least one car.
BreezeNet offers an online rental car guide with major USA airports listed and some international ones; their website is www.bnm.com
Car porters are the ones who will introduce you to a car companies who offers car rental services.
If you are looking to find cheap car rental in New York, then you should go online to the Kayak website. It offers information and prices on the rent price of the car service that you select.