All insurance companies especially the larger insurance companies do use your credit score to decide what rates you are to pay for insurance.
Your credit score determines how good of a risk you are to the insurance company so the higher your credit score the less of a risk you are to the insurance company and as a result the less your insurance premiums will be.
The lower your credit score the higher you are a risk to the insurance company and the higher your insurance premiums are.
So having a good insurance score and good credit score is needed to get a good rate on your insurance.
Also having a low credit score may affect your ability to get some types of insurance such as auto insurance, homeowners insurance, renters insurance etc.