When buying car insurance, you generally want to weigh price, customer satisfaction and other factors important that are to you. To help, we've collected information about the four largest auto insurance companies in a variety of categories.

About Allstate

Allstate sells a wide variety of insurance, including insurance for cars, homes, renters, condos, boats and motorcycles. It also sells small business insurance and commercial auto insurance.

If you're looking for extra car insurance features, Allstate offers accident forgiveness and new car replacement after a bad accident (for cars two model years old or less).

Allstate's rewards program lets you earn points that you can redeem in gift cards, sweepstakes and other items if you drive safely. And with the Allstate Safe Driving Bonus, you can get a check every six months that you don't have an accident.

If you're interested in an app that can help improve your driving, check out Allstate's Drivewise app. It will give you feedback on speeding, hard braking and limiting late-night trips.

Allstate is based in Northbrook, Illinois. It sells insurance primarily through Allstate agents.

Allstate also owns the insurance brands Encompass and Esurance.

About Geico

Geico stands for Government Employees Insurance Co.

Geico mainly sells personal and commercial auto insurance. Through the Geico Insurance Agency you can also buy homeowners, renters, business insurance and other coverage types, and the policies will come from other companies.

The Geico mobile app lets you pay a bill, see your account balance, send insurance ID cards, and report and track a claim. It also helps you find parking and see gas prices nearby.

The company is based in Chevy Chase, Maryland. Geico is owned by Berkshire Hathaway.

About Progressive

Progressive sells auto, motorcycle, boat and other insurance. Additional insurance types are also available through Progressive's insurance agency.

With Progressive's mobile app you can see your policies, view your insurance ID card, start and track a claim, get roadside assistance and more.

If you're a good driver and want to save money, check out Progressive's Snapshot. The program personalizes your car insurance rate based on your actual driving. It works through a mobile app or car plug-in device and measures things like phone use while driving, hard braking and hard acceleration. Snapshot includes tips to improve your driving, and you can get a car insurance discount for safe driving.

Progressive is based in Mayfield, Ohio.

About State Farm

State Farm offers a wide array of financial services, including insurance, credit cards, banking and loans. Insurance choices include auto, motorcycle, boat, home, renters, condo, life and disability insurance.

With its mobile app you can view insurance ID cards, request roadside assistance, start claims, upload photos of car damage and more.

State Farm's Steer Clear app can help drivers under age 25 become safer drivers with videos, quizzes and a record of trips.

The company's Drive Safe & Save offers a discount based on mileage and safe driving, such as braking, speeding and hard acceleration. A mobile app will track how much and how well you drive.

State Farm is based in Bloomington, Illinois.

Best for customer satisfaction ratings: Geico

In a survey of current customers of the four insurers, EverQuote found similar overall satisfaction ratings. Geico edged out the others on price satisfaction.

Company
Click to see reviews
Overall satisfaction Price satisfaction Customer service satisfaction
Allstate reviews 4.5 stars 4 stars 4.5 stars
Geico reviews 4.5 stars 4.5 stars 4.5 stars
Progressive reviews 4.5 stars 4 stars 4 stars
State Farm reviews 4.5 stars 4 stars 4.5 stars
Source: EverQuote, based on a March 2018 survey of 2,252 current auto insurance customers of the companies.

More ratings: Best car insurance companies

Best for low complaints: State Farm

State Farm had the fewest complaints from its auto insurance customers relative to its size, according to data from the National Association of Insurance Commissioners. The complaint ratios below represent the number of complaints in relation to an insurer's size of business.

All four insurers have complaint ratios that are better than the industry median of 1.00.

Complaints against Allstate, Geico, Progressive and State Farm

Coverage comparison

Auto insurance type Allstate Geico Progressive State Farm
SR-22 filings (proof of auto insurance) Yes Yes Yes Yes
Gap insurance Yes No Yes No
Usage-based insurance Yes No Yes Yes
Non-owner insurance No Yes Yes Yes
Rideshare insurance Yes Yes Yes Yes
Source: EverQuote research. Product options might not be available in all states or from all subsidiaries. If product availability appeared to be extremely limited we did not mark is as available.

Biggest: State Farm

State Farm holds the largest market share for private passenger auto insurance. Together, Allstate, Geico, Progressive and State Farm hold just over 50% of the total market.

Rank Company Market share
1 State Farm

18.18%

2 Geico

12.87%

3 Progressive

9.91%

4 Allstate

9.32%

Source: S&P Global Market Intelligence, based on direct premiums written in 2017 for private passenger auto insurance

How to choose the best company for you

There are many car insurance companies competing for your business no matter where you live.

If your main deciding factor is price, get price quotes from multiple companies. Don't rely on friends and family to recommend a good deal. That's because the best company for you will vary based on your location, driving record, credit (in most states) and other factors.

Also, if your driving record has changed over the years, the company that offered a good deal previously may no longer be cheap for you.