Aon vs Counterpart: Professional Liability / E&O Insurance

Counterpart sells through wholesale brokers with separate programs for miscellaneous professionals, architects, allied healthcare and lawyers, while Aon is a global broker and adviser to 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

Areas of coverage

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 ↗

Counterpart

  • role: Counterpart describes its product distribution through Counterpart Insurance Services, Inc. and wholesale brokers. The cited marketing pages do not identify the insurer for a particular professional-liability risk or state.company-reportedSource ↗Source ↗
  • eligibility: Counterpart lists distinct professional-liability programs for miscellaneous professionals, architects/engineers/contractors, allied healthcare and lawyers. Each page has its own occupation scope; no single eligibility rule applies across all four products.company-reportedSource ↗Source ↗Source ↗Source ↗
  • coverage: The Lawyers Professional Liability page describes claims arising from lawyers’ professional services; the MPL page gives service-related negligence and financial-loss examples. These are distinct program summaries and do not establish identical policy triggers or coverages.company-reportedSource ↗Source ↗
  • limits: Counterpart says its professional pages support modular limits and presents sample limits and retentions for selected professions. Published examples are illustrative, not terms available to a particular applicant.company-reportedSource ↗Source ↗

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

Form and Coverage Scope

Aon says it tailors professional-liability structures to professional-services firms’ needs and names law, accounting and consulting as its audience. Counterpart separates its offering into programs for miscellaneous professionals, architects/engineers/contractors, allied healthcare and lawyers. Its lawyers page addresses claims from legal services, while its miscellaneous-professional page gives service-negligence and client financial-loss examples. Buyers should route themselves to the occupation-specific Counterpart form and ask Aon which form covers their actual work. [1] [6]

Buyer Fit and Policy Terms

Counterpart says professional pages support modular limits and show sample limits and retentions for selected professions. Aon’s reviewed overview does not publish figures and does not name a carrier for an account. Counterpart distributes through its insurance-services entity and wholesale brokers. These distinctions make Counterpart’s public product map more specific, but do not establish the terms for a given applicant. Request the form, insurer and limit structure from both. [1] [6]

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

  • Ask Counterpart which professional program applies and whether the sample limits match your quote. [1] [6]
  • Ask Aon for the issuing insurer, form and account-specific limits and retention. [1] [6]

Aon describes tailored professional-liability placement for professional firms. Counterpart offers distinct programs for miscellaneous professionals, architects and engineers, allied healthcare and lawyers.

Sources reviewed

  1. 01
    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

  2. 02
    How can I get insurance through Counterpart?

    Counterpart Knowledge Center · Retained source: article describes wholesale-broker referral route; prior access 2026-09-28. · accessed 2026-09-28

  3. 03
    Allied Medical & Healthcare Liability

    Counterpart, Inc. · Retained provider source: names allied healthcare classes, combined coverage/enhancements and illustrative limits/examples; does not establish conventional malpractice for every medical profession or standalone general liability. Prior access 2026-09-28; direct reopen failed in this session. · accessed 2026-09-28

  4. 04
    Architects, Engineers, & Contractors Liability

    Counterpart, Inc. · Retained provider source: A&E/contractor class examples, services, enhancements and illustrative limits; prior access 2026-09-28. · accessed 2026-09-28

  5. 05
    Counterpart | Agentic Insurance™

    Counterpart, Inc. · Retained provider source: footer states insurance products are offered by Counterpart Insurance Services, Inc., described as a licensed producer and surplus-lines broker; product/state availability varies, issuer not mapped by product/state. Prior access 2026-09-29. · accessed 2026-09-29

  6. 06
    Lawyers Professional Liability Insurance

    Counterpart, Inc. · Reopened 2026-09-30: page lines 4–8 names lawyer-focused product; lines 236–272 company-stated geographic reach, modular liability limit examples, professional services, technology/media extensions and GL alongside professional cover. Product terms remain policy-specific. · accessed 2026-09-30

  7. 07
    Professional & General Liability

    Counterpart, Inc. · Reopened 2026-09-30: page lines 4–8 says MPL may be purchased alone or packaged with GL; lines 208–245 describe industries and coverage examples; lines 251–283 describe risk assessment, quoting channels and underwriter access. Marketing page, not binding terms. · accessed 2026-09-30

  8. 08
    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

  9. 09
    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

  10. 10
    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

  11. 11
    Get business insurance

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

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