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 Liberty Mutual Business Insurance?
Liberty Mutual spans small-commercial, commercial, specialty, surety, and reinsurance businesses. The insurer and distribution route depend on the product, so check the offer and policy before you compare terms. 4,5
What Is Inland Marine Insurance?
If your business moves equipment between sites or ships goods, inland marine can cover those property exposures; installation and other forms address different property categories. Match the quote to what you own, rent or hold for others. 8,9
Key Differences in Inland Marine Insurance
Property under construction and in motion
AIG markets inland marine for transportation/logistics and construction/equipment exposures. Liberty Mutual describes protection for assets under construction or frequently moved, including construction projects, inventory in transit, jobsite equipment and materials stored by subcontractors. A builder can use those Liberty examples to identify exposures for a quote, while asking AIG whether its construction or transportation product better maps to the same project phases. 3 6
Engineering and claims support
AIG describes marine risk consulting, route or equipment-risk reviews and claims resources. Liberty Mutual describes property underwriting, risk-engineering and claims teams working together on complex property risks. Ask whether the proposed inland-marine policy receives those services, particularly for a project with multiple subcontractors, transit legs or temporary storage locations. 3 6
Transit and subcontractor custody
Liberty Mutual’s overview frames coverage around assets on the move but does not set cargo, territory or transit conditions for a particular policy; AIG likewise leaves property and causes to the issued terms. Submit project values and locations, then compare coverage during installation, subcontractor custody and transport on both forms. 6 3
What to Confirm in Inland Marine Insurance Quotes
- Which AIG product or Liberty Mutual form covers each project phase, subcontractor-held material and transit leg?
- What territory, covered causes, limits and deductibles apply to stored and moving property in each quote?
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 reviewsLiberty Mutual
Review Score
2 rated sources
Customers give Liberty Mutual 4.2 out of 5 on Trustpilot from 3,836 reviews, but that page mixes auto, home and life customers with business ones. For business insurance specifically, NerdWallet gives 3.0 out of 5 and reports more complaints than expected.[4][1]
Read Liberty Mutual reviewsOffering Details
AIG vs Liberty Mutual: Inland Marine Insurance: documented features by provider
| Criteria | AIG Inland Marine Insurance | Liberty Mutual Inland Marine |
|---|---|---|
| Role in This Line | AIG markets inland marine insurance through transportation/logistics and construction/equipment offerings. The exact insurer and legal form for a particular placement are not identified on the overview page. 3Company-reported. Role in this product is limited to the description on the linked AIG source. | Liberty Mutual lists Inland Marine in its property portfolio and maintains a separate inland-marine product page. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Who It’s For | AIG identifies transportation and logistics businesses and construction or equipment exposures, including contractors, equipment and movable business property. The public overview is not a complete applicant eligibility schedule. 3Company-reported. Audience is the segment AIG names on the linked source; this is not an underwriting decision, quote or guarantee of availability. | The page frames inland marine for companies with assets on the move; it does not identify the applicant, cargo, territory or transit conditions that a specific policy will cover. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Coverage Features | AIG describes inland marine protection for movable property and lists transportation/logistics plus construction/equipment categories. The page does not determine which property, causes, locations or transit stages are covered in a buyer’s policy. 3Company-reported. AIG’s public product description is not the policy. Actual entitlement depends on the applicable issued form, endorsements and declarations. | The product page describes protection for assets under construction or frequently moved, including construction projects, inventory in transit, jobsite equipment and subcontractor-stored materials. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Limits and Retentions | Published capacity figures are segment-specific and do not establish a buyer’s policy limit. Confirm the scheduled property, sublimits, catastrophe terms and deductible in the quote and policy. 3Not publicly disclosed. This statement reports only what the linked public source discloses and does not substitute for a quote or issued policy. | The cited public overview does not establish the limits, deductibles, exclusions or form terms that would apply to a specific buyer. 6,7Not publicly disclosed. Ask for the quote and specimen or issued policy forms before treating a listed feature as covered. |
| Risk Services | AIG describes marine risk consulting, risk engineering and claims resources, including route or equipment-risk review where applicable. Its Claims Promise applies only after coverage confirmation and to specified agreed-loss circumstances. 3Company-reported. The linked page describes company-reported support; specific account services and third-party arrangements must be confirmed. | Liberty Mutual describes property underwriting, risk-engineering and claims teams working together on complex property risks. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
Full Comparison
More AIG vs Liberty Mutual Comparisons
Other Inland Marine 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.
- Inland Marine Insurance. AIG; Official AIG Inland Marine page, lines 242–286: transportation/logistics and construction/equipment segments, example classes, advertised capacity, loss-control and claims support, and policy caveat. Accessed 2026-09-30.
Liberty Mutual
- Company Profile. Liberty Mutual Group; Strategic business units paragraph: US Retail Markets (individuals/small businesses; small commercial; countrywide) and Global Risk Solutions (mid-size/large businesses; commercial, specialty, reinsurance, surety; worldwide). Accessed 2026-09-29.
- Commercial Insurance Solutions. Liberty Mutual Business Insurance; Commercial solutions index names commercial auto and fleet, cyber, environmental liability, equipment breakdown, excess and surplus, general liability, healthcare liability, inland marine, management liability, multinational, ocean marine, professional liability, property, reinsurance, surety, umbrella/excess and workers compensation. Disclosure says policy insurer is named when offered, may be an affiliate/subsidiary or surplus-lines insurer; states/jurisdictions and actual policy terms vary. Accessed 2026-09-29.
- Property. Liberty Mutual Business Insurance; Property solutions section describes commercial property, business-interruption protection, Builder's Risk, Equipment Breakdown, Inland Marine and Ocean Marine; named Premier Property Protector, RM Select, and Liberty Mutual Property Protector product descriptions; states standalone and package options. Coverage terms depend on the policy. Accessed 2026-09-29.
- Inland marine. Liberty Mutual Business Insurance; Official product page: mobile and in-transit assets, construction projects, inventory in transit, jobsite equipment and subcontractor-stored materials; inland-marine underwriting, risk-engineering and claims teams. The page describes exposures rather than policy-specific terms. Accessed 2026-09-30.
Inland Marine Insurance Guide
- Commercial Insurance Guide. California Department of Insurance; Property Insurance; Commercial Property; Inland Marine; Boiler and Machinery. Accessed 2026-09-16.
- Inland Marine Policy: Contractors’ Equipment. Markel American Insurance Company / American Association of Insurance Services; hosted by Florida Department of Management Services; PDF p.8 declarations; attached Contractors’ Equipment printed pp.1–13 (PDF pp.18–30); replacement-cost endorsement PDF p.34. Accessed 2026-09-16.
