AIG vs Aon: How Do They Compare for Professional Liability (E&O) Insurance?

AIG markets customizable entity-based professional errors-and-omissions policies for public and private service providers. AIG is the marketing name; the page’s legal footer says products are written or provided by subsidiaries or affiliates, without naming the issuer for a buyer’s policy. ³Company-reported. AIG’s U.S. Professional Liability page. The page describes the marketed product family, not the legal insurer on an individual quote or policy.

Aon presents Professional Liability / E&O as a line its Professional Services Practice helps arrange or advise on for professional-service firms. Aon is describing a global brokerage and advisory service, not issuing the underlying policy. The producing legal entity and carrier for any particular placement are not named on this page. ⁶Company-reported. Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement.

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The reviewed practice page does not name the insurer or producing legal entity for a specific placement. Ask for both on the quote and binder. ⁶Not found in reviewed sources. Aon’s global practice page as reviewed 2026-09-30; no state-specific placement schedule or buyer quote was reviewed. This does not establish that Aon cannot arrange a placement.

AIG says its specialty professional-liability offering is for service providers and can be customized for a company’s professional services. Its examples include public and private service providers; this does not state that every profession or applicant qualifies. ³Company-reported. Company-described target customer and customization statement. The reviewed page does not provide a complete class appetite or state availability list.

Aon identifies law, accounting and consulting firms as the audience for its global Professional Services Practice. That audience scope does not establish eligibility for every firm or other business. ⁶Company-reported. Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement.

AIG describes coverage for claims alleging negligence in professional services rendered to others, including claims for third-party economic loss. This is a description of the product’s intended subject; covered claims, definitions, exclusions and conditions depend on the issued policy. ³Company-reported. AIG’s marketing description of specialty professional E&O; no policy form or endorsement was reviewed.

Aon describes professional liability as addressing professional-services firms’ liability exposure and says it tailors coverage structures to a firm’s needs. It identifies E&O as a commonly used name for professional-liability insurance; actual policy terms are not stated. ⁶Company-reported. Aon’s marketing description of the brokerage/coverage area. The page is not the insurer’s policy form and does not establish an insured's entitlement to coverage.

The reviewed page does not state standard limits, retentions or deductibles for this offering. Confirm the amounts and policy conditions in the quote and issued form. ³Not publicly disclosed. AIG’s U.S. Professional Liability page reviewed 2026-09-30; no buyer-specific quote or policy was reviewed.

The reviewed page does not state a buyer-specific limit, retention, deductible or other placement terms. Confirm these in the quote, bond or issued policy. ⁶Not publicly disclosed. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed.

AIG says it uses in-house claims professionals and third-party experts, collaborates with clients through the claims process, and uses claims data to help clients evaluate and mitigate loss. These are company-reported service descriptions, not a claim outcome guarantee. ³Company-reported. General professional-liability claims services described by AIG. The page does not state account-specific service standards or identify the administrator for a particular policy.

Aon says its professional-services advisors use industry knowledge, insights, data and tools to support risk-management and human-capital decisions. This is a company-described advisory service, not a claim outcome or policy benefit. ⁶Company-reported. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated.