- Allstate
- Amica Mutual
- Arbella Insurance Group
- Berkshire Hathaway Specialty Insurance
- Bostonian Group
- Cambridge Mobile
- Commerce Insurance
- Encompass Insurance
- Erie Insurance
- Farmers Insurance
- The Hartford
- Holyoke Mutual Insurance
- Liberty Mutual Insurance
- MAPFRE Insurance
- Middlesex Insurance
- Montpelier Reinsurance
- Nationwide
- Norfolk and Dedham Mutual Fire Insurance
- Plymouth Rock Assurance
- Progressive
- Safeco
- Travelers
- USAA
- Wawanesa Insurance
Home Insurance Companies:
- Allstate
- Amica Mutual
- Arbella Insurance Group
- Berkshire Hathaway Specialty Insurance
- Bostonian Group
- Cambridge Mobile
- Commerce Insurance
- Encompass Insurance
- Erie Insurance
- Farmers Insurance
- The Hartford
- Holyoke Mutual Insurance
- Liberty Mutual Insurance
- MAPFRE Insurance
- Middlesex Insurance
- Montpelier Reinsurance
- Nationwide
- Norfolk and Dedham Mutual Fire Insurance
- Plymouth Rock Assurance
- Progressive
- Safeco
- Travelers
- USAA
- Wawanesa Insurance
Health Insurance Companies:
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Fallon Health
- Harvard Pilgrim Health Care
- Massachusetts General Hospital
- Tufts Health Plan
- UnitedHealthcare
Life Insurance Companies:
- Allstate
- Amica Life
- Berkshire Life Insurance
- The Guardian Life Insurance Company of America
- John Hancock Life Insurance Company
- Lincoln Financial Group
- MassMutual
- MetLife
- New York Life Insurance Company
- Northwestern Mutual
- Penn Mutual Life Insurance Company
- Principal Financial Group
- Prudential Financial
- State Farm Insurance
- TIAA-CREF