Alliance Risk vs Aon: Professional Liability / E&O Insurance

Two brokers with different audiences: Alliance Risk targets consultants, accountants, architects, agents and healthcare providers, while Aon's global practice is aimed at law, accounting and consulting firms.

Kearny Risk organizes these comparisons for firms whose advice, content or technology creates professional exposures.Research updated 2026-09-30

What Are the Key Differences Between Alliance Risk and Aon Professional Liability (E&O) Insurance?

Coverage Structure and Evidence

Alliance Risk lists negligent acts or omissions, breach of contract, misrepresentation and missed deadlines as typical E&O allegations, while calling out bodily injury, cyber incidents, employment disputes and known claims as exclusions routed to other lines. Aon says its professional-services practice tailors professional-liability coverage structures to a firm’s needs but does not publish comparable claim examples or exclusions. Buyers should use Alliance Risk’s list to test the actual form and ask Aon to identify its proposed coverage triggers and carve-outs. [1] [2]

Buyer Fit and Placement

The stated audience is also distinct: Alliance Risk names consultants, accountants, architects, real-estate and insurance professionals, technology advisers, healthcare providers and more; Aon names law, accounting and consulting firms. Alliance Risk gives indicative premium ranges by firm size but no limits, and Aon provides no specific pricing or limits. Neither names an account carrier. Compare quote-level limit, retention, insurer and exclusions rather than the broad brokerage descriptions. [1] [2]

What Should You Confirm in Alliance Risk and Aon Professional Liability (E&O) Insurance Quotes?

  • Ask Alliance Risk to confirm whether cyber, prior claims and contract-breach allegations are excluded in the proposed form. [1] [2]
  • Ask Aon for its covered professional services definition, exclusions, limit and carrier. [1] [2]

Areas of coverage

Alliance Risk

  • role: 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. Professional liability product page.company-reportedSource ↗
  • insurer: 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. Professional liability product page as read on 2026-09-23.not-disclosedSource ↗
  • eligibility: 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. Professional liability product page; eligibility for a particular company depends on underwriting.company-reportedSource ↗
  • coverage: 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. Professional liability product page; coverage and exclusions described in general terms, subject to the policy as issued.company-reportedSource ↗
  • limits: 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. Professional liability product page as read on 2026-09-23; cost figures are illustrative premium estimates, not published limits.not-foundSource ↗
  • services: 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. Professional liability product page, Our Approach to Professional Liability and The Alliance Risk Difference sections.company-reportedSource ↗
  • application: 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. Professional liability product page as read on 2026-09-23.not-foundSource ↗
  • claims: 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. Professional liability product page, The Alliance Risk Difference section.company-reportedSource ↗

Aon

  • role: 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. Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement.company-reportedSource ↗
  • eligibility: 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. Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement.company-reportedSource ↗
  • coverage: 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. 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.company-reportedSource ↗
  • services: 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. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated.company-reportedSource ↗
  • insurer: 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. 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.not-foundSource ↗
  • 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. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed.not-disclosedSource ↗

Alliance Risk describes E&O for a broad group of advisory and professional firms, including common covered allegations and exclusions. Aon says it tailors professional-liability structures for law, accounting and consulting firms.

Sources reviewed

  1. 01
    Professional Liability Insurance

    Alliance Risk · Professional Liability Insurance That Safeguards Your Expertise; Our Approach to Professional Liability; The Alliance Risk Difference; What Is Professional Liability Insurance?; What Does/Doesn't Professional Liability Insurance Cover?; How Much Professional Liability Insurance Cost? · accessed 2026-09-23

  2. 02
    Professional Services Practice

    Aon · Named professional-services audiences and global advisory role, lines 125–128; line offerings and explanations lines 131–190; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule. · accessed 2026-09-30

  3. 03
    Professional Liability – US Direct Errors and Omissions Insurance

    Hiscox Inc. specimen · About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act · accessed 2026-09-16

  4. 04
    Professional liability insurance

    Insurance Information Institute · Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion) · accessed 2026-09-16

  5. 05
    FAQ: Professional liability insurance

    Texas Department of Insurance · What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies · accessed 2026-09-16

  6. 06
    Get business insurance

    U.S. Small Business Administration · Six common types of business insurance table · accessed 2026-09-16

Ask Kearny Risk to help relate this comparison to your services and contracts.

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