I was hit by someone driving a rental car. Is the rental company responsible?

Usually not directly. A federal law known as the Graves Amendment generally protects rental and leasing companies from liability simply because they own the vehicle, as long as the company itself was not negligent (for example, by renting a car with known defective brakes). The claim is typically against the renter-driver and their insurance, plus any coverage the renter purchased from the rental company. Florida law also places limits on owner liability for certain rented and leased vehicles. Get the rental agreement number, the renter’s personal insurance details, and the rental company name at the scene.