Carrier comparisons
Employers often come to us with two carrier names already in mind. These pages set the big group health insurers side by side on the things that differ for an employer: who owns them, how big they are, where they sell, how far their networks reach, and how members and rating agencies score them. We do not describe plan benefits or terms; a licensed broker can explain those.
Every figure comes from the carrier, its parent company's filings or an independent survey, with the date beside it. We do not rank carriers or say which is right for your business: plans and networks change by state, county and group size, so a licensed broker's side-by-side quote is the only way to see what is open to you.
Aetna vs Anthem: how do they compare for employer health plans?
Aetna vs Anthem for employer health insurance: a national CVS carrier against the Blue plan in 14 states, with ownership, size, networks and ratings.
Updated 1 November 2026
Aetna vs Blue Cross Blue Shield: how do they differ for employers?
Aetna vs Blue Cross Blue Shield (BCBS) for employers: a CVS-owned national carrier against your local Blue, with ownership, networks and ratings.
Updated 1 November 2026
Aetna vs Cigna: how do they differ for employers?
Aetna vs Cigna for employer group health insurance: ownership, size, which employers each sells to, networks, ratings and 2026 changes, with sources.
Updated 1 November 2026
Aetna vs UnitedHealthcare: what's the difference for employers?
Aetna vs UnitedHealthcare for employer health insurance: who owns them, membership, market share, network counts, ratings and 2026 changes.
Updated 1 November 2026
Anthem Blue Cross vs Blue Shield of California: what's the difference?
Anthem Blue Cross vs Blue Shield of California for employers: two separate companies, their ownership, size, pharmacy links and report card scores.
Updated 1 November 2026
Anthem vs Blue Cross Blue Shield: is Anthem the same as Blue Cross?
Is Anthem the same as Blue Cross Blue Shield? Where Anthem is the Blue plan, where it isn't, how BlueCard works, and what it means for an employer plan.
Updated 1 November 2026
Anthem vs UnitedHealthcare: what's the difference for employers?
Anthem vs UnitedHealthcare for employers: the Blue company in 14 states against the largest US commercial insurer, with size, networks and ratings.
Updated 1 November 2026
Cigna vs Blue Cross Blue Shield: how do they differ for employers?
Cigna vs Blue Cross Blue Shield for employers: company structure, the group sizes each sells to, market share, networks, BlueCard and 2026 ratings.
Updated 1 November 2026
Cigna vs UnitedHealthcare: how do they compare for employers?
Cigna vs UnitedHealthcare for employers: size, market share, networks, the group sizes each sells to, recent changes and ratings, with sources and dates.
Updated 1 November 2026
UnitedHealthcare vs Blue Cross Blue Shield: how do they differ for employers?
UnitedHealthcare vs Blue Cross Blue Shield for employers: one national company against 33 local Blues, with market share, networks, BlueCard and ratings.
Updated 1 November 2026
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