In general you and your vehicle are protected against many kinds of threats like physical damage to the vehicle, personal injury and liability by obtaining an auto insurance policy. These policies are obtained by insurance companies. In order to be properly protected you should consider some good ways of finding a reputable and reliable auto insurance company.
Within the state in which you own and operate your vehicle there are most likely many different auto insurance companies. You can get a listing of these companies by using an online search engine like Google and typing in the appropriate search terms. Google should provide you with a list of the companies which are authorized to operate in your state. 
Most of the companies listed also have a link to their website. This is a great way to learn more about the company and the insurance products they offer. In general it is good idea to focus on those companies which come up in the first or second page of search results as they tend to be the larger and more well-established companies.
But there can be a large difference between the quality, performance and reputation of the companies considered. So it is good idea to use some of the resources on the Internet to find ratings and reviews of different companies. One good option is to study online forums which deal with these topics.
There may be many sections and discussions by knowledgeable participants focusing on information pertaining to insurance companies. The information is often reliable and unbiased.
Many states have websites sponsored by the insurance department. They may post information pertaining to different companies and includes ratings and reviews.
If you visit the online Better business bureau website you can often look up different insurance companies to see if they have an excessive number of open and unresolved complaints. You can learn a great deal about these companies by searching through these records.
And blogs can be another helpful resource in evaluating insurance companies. There are a number of specialized blogs which focus on this topic. Check them out and see how different companies are rated and why.
If you use some of these resources you should have little trouble in learning much more about different insurance companies and find one or more reputable and reliable ones to work with. It can save you from unforeseen loss and many other problems in the long run.