What Is AIG?
AIG is the marketing name for American International Group, Inc.; AIG says its insurance products are written or provided by subsidiaries or affiliates. Its U.S. business pages list commercial casualty, property, cyber, management and professional liability, and specialty programs, but a brand-level page does not identify the insurer for a particular policy. 1,2
What Is Marsh?
Marsh suits technology and larger businesses seeking specialist cyber placement or broad global risk advice; small firms wanting a quick standard quote should compare its MMA route or digital agencies. 4,5,6,7
What Is Commercial Property Insurance?
Commercial property may fit your business if you own a building or rely on equipment and stock. Compare replacement-cost terms, deductibles and any coinsurance condition, and check lost-income protection separately. 10,11,12
Key Differences in Commercial Property Insurance
Corporate property insurance and specialist placement programs
AIG names hospitals, universities, and global manufacturers among its property audiences and describes a dedicated Property claims team. Marsh McLennan Agency places property for middle-market clients, while Marsh’s technology practice arranges coverage for data centers. For data-center operators, the specialist placement matters because the property program may need to account for digital infrastructure exposures beyond the building itself. 3 8
Data-center coverage coordination
Marsh says data-center property coverage is typically paired with equipment breakdown, business interruption, cyber, and general liability to address gaps a conventional property policy alone may leave. Its broader property practice also offers valuation, catastrophe modeling, claims advocacy, risk control, captives, and parametric options. AIG describes property protection and claims service, but its public record here does not lay out that data-center package. Ask for the coordinated terms, including dependencies between coverages, in either quote. 3 8
What to Confirm in Commercial Property Insurance Quotes
Review Scores
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
AIG
Review Score
2 rated sources
Customer ratings for AIG are low: Trustpilot shows 1.9 out of 5 from 252 reviews, and NerdWallet gives 2.5 stars and notes more claims complaints than expected. These pages cover many AIG products and countries, so they only loosely describe business insurance.[1][2]
Read AIG reviewsMarsh
Review Score
2 rated sources
Marsh’s global Trustpilot profile has a poor 1.3/5 score. Treat it as a service warning to investigate with your proposed team; it does not isolate US commercial accounts.[2][4][7]
Read Marsh reviewsOffering Details
AIG vs Marsh: Commercial Property Insurance: documented features by provider
| Criteria | AIG Commercial Property and Retail Property | Marsh McLennan Agency Commercial Property Insurance |
|---|---|---|
| Role in This Line | AIG markets commercial property insurance and identifies Retail Property as a product area. For domestic and global corporate and risk-management clients, the page describes both risk-transfer insurance and non-risk-transfer fronting or captive solutions; those structures are not the same as an insurance policy issued by AIG. 3Company-reported. AIG’s U.S. Commercial Property page. It does not identify the insurer or fronting company for a particular buyer’s placement. | Marsh McLennan Agency (MMA), Marsh's middle-market subsidiary, places commercial property insurance; separately, Marsh's technology industry practice arranges property coverage for digital infrastructure such as data centers. 8,9Company-reported. MMA property insurance page and Marsh's data center insurance page. |
| Issuing Insurer | Confirm in your quote. | The reviewed pages do not name a specific commercial property insurer. 8,9Not publicly disclosed. MMA property insurance page and Marsh data center page as read on 2026-09-23. |
| Who It’s For | AIG names businesses including hospitals, universities and global manufacturing among the varied organizations for which it has property options. The page does not provide a complete eligible-class list or state-by-state availability schedule. 3Company-reported. Illustrative customer types on AIG’s U.S. Commercial Property page; examples do not establish an applicant’s eligibility. | Confirm in your quote. |
| Coverage Features | AIG describes commercial property insurance as protecting business physical property against unexpected events such as storm damage, theft and vandalism, and says coverage can extend to certain work-related contents such as office equipment, furniture, fixtures and inventory. These are examples; actual coverage depends on the facts and each policy’s terms, conditions and exclusions. 3Company-reported. General property description on AIG’s product page, not a summary of a specific policy or all covered causes of loss. | MMA says commercial property insurance protects an organization's physical assets, including owned or rented property, equipment and inventory, from unexpected loss events, with named options for flood, hurricane and windstorm, wildfire and earthquake coverage. 8Company-reported. MMA property insurance page; illustrative description, not a specific policy form. For data centers specifically, Marsh says property coverage is typically paired with equipment breakdown, business interruption, cyber and general liability coverage to close gaps that a conventional property policy alone would leave open. 9Company-reported. Data center insurance page FAQ. |
| Limits and Retentions | The reviewed page does not state standard property limits, deductibles or retentions for a buyer. Confirm those amounts, covered causes and conditions in the quote and issued policy. 3Not publicly disclosed. AIG’s U.S. Commercial Property marketing page reviewed 2026-09-30; no buyer-specific quote or policy form was reviewed. | Confirm in your quote. |
| Risk Services | AIG says property risk engineers help clients identify and mitigate loss and that its engineers collaborate with clients on solutions tailored to risk factors. The page does not state that these services are included for every account or guarantee reduced losses. 3Company-reported. Company-described commercial property risk engineering; account-specific service availability is not stated. | MMA says its property practice offers hazard assessment and valuation services, loss and catastrophe modeling, claims advocacy, pre- and post-loss risk control, and alternative risk solutions such as captives and parametric insurance options. 8Company-reported. MMA property insurance page, Benefits of Property Insurance section. |
| How to Apply | Confirm in your quote. | You work with an MMA property specialist directly; the page names a National Accounts Property Practice Leader and describes advisor-led placement rather than an online quote. 8Company-reported. MMA property insurance page. |
| Claims Support | AIG describes a dedicated Property claims team and a claims promise intended to enable prompt resolution. The page does not publish a service-level deadline or claim outcome guarantee. 3Company-reported. AIG’s company-reported general property claims description; no account-specific claims handling terms were reviewed. | Confirm in your quote. |
Full Comparison
More AIG vs Marsh Comparisons
Other Commercial Property Insurance Comparisons
Sources
AIG
- Investor Relations. American International Group, Inc. (AIG); About AIG and legal footer; lines 244–246 and 327–331. Accessed 2026-09-28.
- Business. AIG US; Surplus Lines heading and paragraph, lines 357–359. Accessed 2026-09-28.
- Commercial Property Insurance. AIG US; Property risk description and customer examples, lines 242–245; claims, risk engineering and Retail Property solutions, lines 250–276; general property examples and actual-policy caveat, lines 298–303; legal footer, lines 348–351. Accessed 2026-09-30.
Marsh
- Marsh | Leader in risk, strategy, people, and investments. Marsh; Hero and capability tiles; FAQ: What does Marsh do?; industries served; Is Marsh the same as Marsh McLennan? January 2026 brand change. Accessed 2026-09-16.
- Compensation guide for US clients. Marsh; US broking segments; broker role; retail commissions, client fees, wholesale, insurer consulting, contingent and supplemental commissions; Marsh LLC and Marsh USA LLC; page 3: broker role and Marsh & McLennan Agency segment; page 7: copyright © 2024 Marsh LLC. Accessed 2026-09-16.
- Marsh McLennan Agency (MMA). Marsh; Middle-market US organizations; wholly-owned subsidiary; business insurance, employee health and benefits, retirement, private client. Accessed 2026-09-16.
- Technology | Insurance Broking & Risk Management. Marsh; Opening Technology Practice description; practice links including data center insurance, fintech and Stratus; Talk to us. Accessed 2026-09-16.
- Property Insurance. Marsh McLennan Agency; Property Insurance section: physical-asset protection; Flood, Hurricane and Windstorm, Wildfire, Earthquake subsections; Benefits of Property Insurance. Accessed 2026-09-23.
- Data Center Insurance and Risk Management Services. Marsh; Managing data center risk; FAQ: What does data center insurance typically cover? (property damage, equipment breakdown, business interruption, cyber, general liability). Accessed 2026-09-23.
Commercial Property Insurance Guide
- Commercial Insurance Guide. California Department of Insurance; What Should I Expect from a Broker-Agent; Commercial Property: Coverage Sections, Limits of Insurance, and Coinsurance; Covered Causes of Loss; Valuation Types; Inland Marine. Accessed 2026-09-16.
- Business Interruption Insurance/Businessowner’s Policies (BOP). National Association of Insurance Commissioners; Background; Commercial Property and Business Interruption bullets. Accessed 2026-09-16.
- Commercial property insurance guide. Texas Department of Insurance; Introduction; Coverage options; Shopping for commercial property insurance; Saving money on your insurance. Accessed 2026-09-16.
