The best rated insurance company would greatly depend on the type of insurance one is inquiring about as well as the country one is located. As an example, in the United States the best rated auto insurance company is USAA according to MSN Money.
Any Insurance company that has an AM Best A+ rating. That's the highest rating a company can get and almost all of them do.
The website Top Tens lists a number of online insurance companies. For car insurance they rated Liberty Mutual as the best, while for health insurance they rated Allstate Insurance Company as number 1.
The best life insurance company is one which is financially sound and has a proven track record for paying out death benefits. Life insurance companies are rated for this by rating companies like A.M. Best. The best rating with them is an A++.
The car insurance company, Nation Wide, offers the highest rated teenage car insurance on the market. The company prides themselves in making sure each driving teen is safe.
Life Insurance Corporation of India is the best rated Life Insurance Company of the world, with 30 crore policies (much larger than population of US) with claim ration of 99.95%.
Allstate and Geico are among the top rated in Arizona.
One of the highest rated companies for senior life insurance would be the Senior Life Insurance company. They have information on the following website: http://www.seniorlifeinsurancecompany.com/.
In a recent survey Nationwide Mutual Insurance company was rated the best fire insurance provider. The ratings looked at covered events, average payouts, and many other metrics.
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Encompass insurance is an insurance company. It is rated A by the BBB. All they do is personal insurance.
Statefarm insurance based in Bloomington Illinois is the highest rated at the time.
I don't know but it is a subsidiary of Aegon NV which is a large insurance company rated A+ by A.M. Best®