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

Alliance Risk places professional liability (errors and omissions, or E&O) coverage as a broker, saying it backs placements with risk-specific underwriting input and carrier partnerships rather than underwriting the policy itself. ⁴Company-reported. Professional liability product page.

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. ⁷Company-reported. Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement.

The reviewed professional liability page does not name the insurer that would issue a policy; it refers generally to 'strong carrier partnerships' without identifying a specific carrier. ⁴Not publicly disclosed. Professional liability product page as read on 2026-09-23.

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. ⁷Not 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.

Alliance Risk targets professional liability at consultants and advisory firms, accountants and tax professionals, architects and engineers, real estate and insurance agents and brokers, marketing and PR agencies, IT and technology consultants, healthcare providers, and financial planners and investment advisors. ⁴Company-reported. Professional liability product page; eligibility for a particular company depends on underwriting.

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. ⁷Company-reported. Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement.

Alliance Risk lists negligent acts or omissions, breach of contract, misrepresentation, and missed deadlines as typically covered, and says bodily injury or property damage, intentional wrongdoing or fraud, employment disputes, cyber incidents, and prior known claims are excluded and belong to other lines such as general liability, EPLI or cyber liability. ⁴Company-reported. Professional liability product page; coverage and exclusions described in general terms, subject to the policy as issued.

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. ⁷Company-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 professional liability page gives cost ranges by firm size (for example, solo practitioners at $500-$3,000 a year up to mid-sized to large firms at $10,000-$50,000-plus) but does not publish specific coverage limits, retentions or deductible amounts for this line. ⁴Not found in reviewed sources. Professional liability product page as read on 2026-09-23; cost figures are illustrative premium estimates, not published limits.

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. ⁷Not publicly disclosed. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed.

Alliance Risk describes its approach to professional liability as including industry-specific risk reviews, claims-trend analysis, customized policy language, review of client contracts to limit personal exposure, and expertise structuring claims-made policies including tail coverage, prior acts and retroactive dates. ⁴Company-reported. Professional liability product page, Our Approach to Professional Liability and The Alliance Risk Difference sections.

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. ⁷Company-reported. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated.

The professional liability page's only application route is a generic 'Get a quote' request; it does not list the specific submission information Alliance Risk asks for on this line, unlike its D&O, EPLI and fiduciary product pages. ⁴Not found in reviewed sources. Professional liability product page as read on 2026-09-23.

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Alliance Risk says professional liability clients get access to a legal network and claims experts who understand the client's industry, providing a defense strategy if a claim arises. ⁴Company-reported. Professional liability product page, The Alliance Risk Difference section.

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