Best Health Insurance Companies 2024: Costs, Rankings, and What You're Actually Getting

Kaiser Permanente tops the rankings among major ACA marketplace insurers with a perfect 5.0 score, standing out primarily for cost — its average silver plan runs $504/month, roughly $175 cheaper than Blue Cross Blue Shield's $679 average. Blue Cross Blue Shield earns the runner-up spot (4.5) for its unmatched provider network breadth, while Aetna (4.2) wins on customer complaints, logging among the fewest grievances filed with state insurance departments.

The overall unsubsidized average for ACA marketplace coverage sits at $590/month, but age dramatically reshapes that number. An 18-year-old pays around $397/month, while a 60-year-old faces $1,208 — a 3x difference driven entirely by age rating rules. Across all eight insurers reviewed — Kaiser, Blue Cross Blue Shield, Aetna, Ambetter, Cigna, Molina Healthcare, Oscar, and UnitedHealthcare — Kaiser consistently offers the cheapest premiums at every tier. For a 40-year-old on a silver plan, Kaiser comes in at $498/month versus Blue Cross Blue Shield's $654 and Cigna's $612.

Metal tier selection is one of the biggest cost levers consumers have. Silver plans dominate — the Kaiser Family Foundation estimates 11 million of 21 million ACA enrollees are on silver plans — because they balance premiums with out-of-pocket exposure (insurer covers 70%, enrollee covers 30%). Bronze plans cut premiums sharply but leave enrollees responsible for 40% of costs after deductible, making them risky for anyone who actually uses healthcare. Platinum plans, rare on the marketplace and only offered by Kaiser and Blue Cross Blue Shield among the reviewed insurers, flip the equation: highest premiums but only 10% out-of-pocket once the deductible is met.

Plan type adds another layer of trade-offs. PPOs offer the most flexibility — out-of-network coverage, no referrals needed — but carry the highest premiums. HMOs are cheaper but lock enrollees into a network and require primary care referrals for specialists. EPOs split the difference on referrals (none required) but still won't pay for out-of-network care. Digital experience varies sharply: Blue Cross Blue Shield and Kaiser earned "Excellent" ratings for their apps and websites, while Molina Healthcare scored "Poor" — a meaningful gap given how much members rely on digital tools to find providers and manage claims.

One practical tip that cuts against conventional wisdom: don't rely on insurer websites to verify whether a doctor is in-network. Provider directories are frequently outdated or contain errors. Calling the doctor's office directly remains the most reliable method for confirming network status before scheduling care.