Introduction
Coverage Comparison
| Coverage | Aon | At-Bay |
|---|---|---|
| Builders risk | Listed 14Aon names Construction Property/Builders Risk on its global construction page; confirm whether this line is offered for the buyer, state, and placement. | Not listed |
| Cargo and transit | Listed 9Aon lists cargo placements in its global marine practice; U.S. eligibility, insurer, limits and policy terms are not stated on the reviewed page. | Not listed |
| Commercial auto | Listed 6Aon lists automobile liability within its global Professional Services Practice for law, accounting and consulting firms; U.S. availability and specific policy terms are not established. | Not listed |
| Commercial property | Listed 8Aon describes commercial-property brokerage and risk management, with a U.S.-available analytics tool; tool availability does not establish state-specific insurance availability. | Not listed |
| Crime | Listed 6Aon lists crime within its global Professional Services Practice for law, accounting and consulting firms; U.S. availability and specific policy terms are not established. | Not listed |
| Cyber liability | Listed 7,6Aon describes cyber insurance and related brokerage, analytics and claims support; confirm the producing entity, insurer, jurisdiction and policy terms for a U.S. placement. | Listed 17At-Bay offers primary and excess cyber insurance for businesses with revenue up to $5 billion. |
| Directors and officers | Listed 5Aon describes D&O brokerage and program services in a global practice; this does not identify the producer, insurer or state availability for a particular U.S. placement. | Not listed |
| Employment practices liability | Listed 6Aon lists EPL for professional-services firms in a global practice; this does not establish eligibility for every U.S. employer or state. | Not listed |
| Fiduciary liability | Listed 6Aon lists fiduciary liability within its global Professional Services Practice for law, accounting and consulting firms; U.S. availability and specific policy terms are not established. | Not listed |
| General liability | Listed 14Aon lists general liability within construction liability coverage areas in its global construction practice; this does not establish a standalone or U.S.-available line. | Not listed |
| Kidnap and ransom | Listed 6Aon lists kidnap and ransom within its global Professional Services Practice for law, accounting and consulting firms; U.S. availability and specific policy terms are not established. | Not listed |
| Management liability | Listed 6Aon describes management liability in its global Professional Services Practice as a partnership program for law, accounting and consulting firms, rather than a standalone line; U.S. availability and specific policy terms are not established. | Not listed |
| Professional errors and omissions (E&O) | Listed 6Aon describes professional-liability/E&O services for law, accounting and consulting firms; a U.S. placement and any separate technology E&O terms remain to be confirmed. | Listed 18At-Bay offers primary miscellaneous professional liability insurance. |
| Surety bonds | Listed 10Aon markets Commercial Surety globally and says availability depends on jurisdiction; the page does not establish U.S. placement availability. | Not listed |
| Technology errors and omissions (E&O) | Not listed | Listed 16At-Bay offers primary and excess technology errors and omissions insurance for businesses with revenue up to $5 billion. |
| Umbrella and excess liability | Listed 14Aon lists umbrella and excess within construction liability coverage areas; ask whether either applies to your project and jurisdiction. | Not listed |
| Workers’ compensation | Listed 14Aon lists workers compensation among global construction coverage areas; this does not establish state availability or a placement. | Not listed |
A listing may be arranged through an insurer or partner. “Not listed” means this catalogue has no separate offering recorded; ask the provider whether it can quote the coverage and request the policy terms.
Current Spot Scores
Each score uses the rubric for that provider’s documented role. Providers with more than one role may have a score for each.
Aon
BrokerBroker
6.7/ 10Assessed provider: Aon. Scope: Aon group commercial insurance brokerage, assessed at brand level from Aon's published terms, its 2025 SEC filing, and U.S., U.K. and Irish regulator records. It does not assess a single producing entity, insurer or placement, and it is not a ruling on Aon's consulting or benefits businesses.
At-Bay
Hybrid providerBroker
5.2/ 10Assessed provider: At-Bay. Scope: At-Bay Insurance Services LLC as producer/broker and At-Bay Specialty Insurance Company as a Delaware-based E&S carrier, with issuer evidence limited to Cyber and Tech E&O policies announced as issuing on its own paper beginning August 7, 2023.
Carrier & MGA
7.1/ 10Assessed provider: At-Bay. Scope: At-Bay Insurance Services LLC as producer/broker and At-Bay Specialty Insurance Company as a Delaware-based E&S carrier, with issuer evidence limited to Cyber and Tech E&O policies announced as issuing on its own paper beginning August 7, 2023.
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.
Aon
Review Score
3 rated sources
Public ratings for Aon are low: Trustpilot shows 1.2 out of 5 from 782 reviews, and BBB shows 1.6 from five. Aon is a global firm, so those pages mostly reflect other parts of the business, not large U.S. commercial accounts.[4][6][7]
Read Aon reviewsAt-Bay
Review Score
2 rated sources
At-Bay’s public review evidence is thin: one old G2 review and a BBB complaint record. It is not enough to judge day-to-day service or claims handling.[3][6][9]
Read At-Bay reviewsKey Differences Between Aon and At-Bay
What Each Company Does in the Placement
Aon’s U.S. terms describe broker-of-record services for certain Commercial Risk programs. At-Bay describes cyber, technology E&O, and miscellaneous professional-liability products and identifies At-Bay Insurance Services LLC as its agency and surplus-lines broker; its source says coverage is underwritten by non-admitted insurers.
Aon’s U.S. Commercial Risk terms describe Commercial Risk Solutions U.S. as broker of record for certain insurance programs. Separate electronic-delivery terms name Aon Risk Services Companies, Inc. acting for itself and licensed brokerage subsidiaries to deliver arranged policies; the terms define an insurer as the policy issuer and risk bearer. These group-level descriptions do not identify the producer or authority for a particular placement. 1,2Company-reported. Company-reported U.S. Commercial Risk brokerage and electronic-delivery terms; certain programs only. No specific insured, licensed producer, appointment, policy issuer, state authority or placement was matched.
At-Bay offers cyber, technology E&O and miscellaneous professional liability, with coverage described as underwritten by non-admitted insurers. At-Bay Insurance Services LLC is its disclosed property-and-casualty agency and surplus-lines broker. 15,19Company-reported. US brand and disclosed producer; company statements, not regulatory verification.
That distinction matters if you are trying to select a brokerage relationship versus evaluating a specific product and its issuing insurer. At-Bay’s agency and insurer roles are described at the brand level, while Aon’s terms do not identify the producing entity or policy issuer for a particular placement. Ask for those names on each quote. 15 1 2
Quote Workflow and Binding
At-Bay’s broker platform says a broker can start a quote with an application in under two minutes. The quote still requires review, selected limits and retentions, an effective date, contingencies, and signatures before it binds. Aon’s terms describe consultation and application help for certain U.S. programs, with the client giving instructions to bind a program based on Aon’s proposal.
An online quote is not bound coverage; At-Bay’s broker process still requires application review, chosen limits and retentions, documents, effective date, contingencies and signatures before binding. 20,18Company-reported. Public broker workflow; no application submitted and no speed guarantee inferred.
For certain U.S. Commercial Risk programs, Aon says it consults with the client about market conditions, insurers to approach and program strategy, helps prepare underwriting information and applications, and obtains the client’s instructions to bind specific programs based on Aon’s proposal. The client signs applications that require a signature. 1Company-reported. Company-reported contractual terms for certain U.S. Commercial Risk programs; not a universal workflow, online checkout claim, insurer role or guarantee that a quote can bind.
The published pages describe different steps and audiences; they do not establish comparative turnaround times or show that Aon lacks an online tool. If you are a buyer using At-Bay through a broker, ask who will submit the application and handle the placement. With Aon, confirm the specific program, insurer, and written bind instruction. 20 1
What to Confirm in Quotes
- For At-Bay, confirm the issuing insurer, state and surplus-lines route, any service fees, selected limits and retentions, and the contingencies required before binding. 15 20
- For Aon, ask which entity produces each line, which insurer issues it, and how client instructions and compensation work for the account. 1 2
- Compare actual policy forms, exclusions, limits, and claim-notice requirements; matching coverage labels do not establish matching protection. 16 7
Compare Services
What each provider documents about the services you may need
| Criteria | Aon | At-Bay |
|---|---|---|
| Business role | Aon’s U.S. Commercial Risk terms describe Commercial Risk Solutions U.S. as broker of record for certain insurance programs. Separate electronic-delivery terms name Aon Risk Services Companies, Inc. acting for itself and licensed brokerage subsidiaries to deliver arranged policies; the terms define an insurer as the policy issuer and risk bearer. These group-level descriptions do not identify the producer or authority for a particular placement. 1,2Company-reported. Company-reported U.S. Commercial Risk brokerage and electronic-delivery terms; certain programs only. No specific insured, licensed producer, appointment, policy issuer, state authority or placement was matched. | At-Bay offers cyber, technology E&O and miscellaneous professional liability, with coverage described as underwritten by non-admitted insurers. At-Bay Insurance Services LLC is its disclosed property-and-casualty agency and surplus-lines broker. 15,19Company-reported. US brand and disclosed producer; company statements, not regulatory verification. |
| Application process | For certain U.S. Commercial Risk programs, Aon says it consults with the client about market conditions, insurers to approach and program strategy, helps prepare underwriting information and applications, and obtains the client’s instructions to bind specific programs based on Aon’s proposal. The client signs applications that require a signature. 1Company-reported. Company-reported contractual terms for certain U.S. Commercial Risk programs; not a universal workflow, online checkout claim, insurer role or guarantee that a quote can bind. | An online quote is not bound coverage; At-Bay’s broker process still requires application review, chosen limits and retentions, documents, effective date, contingencies and signatures before binding. 20,18Company-reported. Public broker workflow; no application submitted and no speed guarantee inferred. |
Related Reading
Sources
Aon Official Website
- Commercial Risk Solutions U.S. Brokerage Terms of Service. Aon; Lines 120–127: certain-program broker-of-record scope, consultation, application assistance, client signature and bind instruction, and account administration; lines 140–147: variable and contingent compensation, potential placement incentive, and client request route; lines 206–213: no price guarantee and surplus-lines limitations; lines 229–231: client insurer-notice duty unless separately agreed. Accessed 2026-09-29.
- Aon Commercial Risk U.S. Electronic Disclosure and Consent Terms. Aon; Lines 120–125: Aon Risk Services Companies, Inc. acting for itself and licensed brokerage subsidiaries in electronic delivery; insurer is defined as issuer and risk bearer. The passage does not identify a producing entity or insurer for a particular placement. Accessed 2026-09-28.
- Aon plc Form 10-K for the year ended December 31, 2025. Aon plc / U.S. Securities and Exchange Commission; Cover lines 23–34: Aon plc is incorporated in Ireland and gives Dublin as principal executive office; lines 261–263: global client breadth; lines 271–273 and segment discussion: company-reported Commercial Risk brokerage and risk-consulting operations. Filing is parent-level evidence, not placement producer, authority or insurer evidence. Accessed 2026-09-29.
- Middle Market Clients. Aon; Lines 125–132: mid-sized organizations and middle-market framing; lines 165–173: dedicated practice and North America statement; lines 188–224: Commercial Risk capabilities. No numeric company-size cutoff or U.S.-only eligibility rule is stated on the reviewed page. Accessed 2026-09-29.
- Directors’ and Officers’ (D&O) Liability Insurance. Aon; Lines 135–160: general covered allegations and Side A, B and C scenarios, including public/private differences; lines 171–185: insurer-selection analytics, brokerage/claims-team collaboration and management-liability specialization. Product explanation and company-reported services; not an Aon-issued policy or quote. Accessed 2026-09-29.
- Professional Services Practice | Insurance Broking & Risk Management. Aon; Lines 125–128: global professional-services team and named law, accounting and consulting firm audience; lines 131–147: professional-liability/E&O offering and terminology; lines 151–176: cyber and EPL offerings, including management liability described at lines 158–163 as a partnership program/category; lines 180–189: professional-services P&C listing, including crime, fiduciary, kidnap and ransom, and automobile liability. “Loss Prevention” section (directly inspected passage at lines 209–212) conditions law-firm loss prevention on Aon broking of lawyers’ professional liability. Global practice page; no state-specific placement schedule. Accessed 2026-09-29.
- Cyber Risk. Aon; Lines 194–205: cyber risk financing and cyber insurance; lines 206–230: claims advocacy/preparation and third-party incident-response providers, separate client contracts, no performance guarantee, and possible referral remuneration. Company-reported global service description. Accessed 2026-09-29.
- Property Risk Management. Aon; Lines 132–140: property/buildings/contents and possible business-interruption cover, broker team services; lines 148–159: rates, retentions, limits, deductibles, benchmarking and U.S.-available Property Risk Analyzer; lines 161–168: global market access and alternate risk transfer. Tool availability does not establish placement availability or authority by state. Accessed 2026-09-29.
- Marine Insurance and Risk Management. Aon; Lines 123–126: global marine practice, customer examples and marine claims/risk services; lines 155–175: cargo offerings including project cargo, general cargo, stock throughput, excess storage and freight/logistics. No U.S. placement terms, insurer, limits or state authority specified. Accessed 2026-09-29.
- Commercial Surety. Aon; Lines 125–127: commercial surety bond description and three parties; lines 190–210: Aon says it approaches the surety market globally and describes its brokerage support, with offerings depending on jurisdiction; lines 211–222: examples of bond types. Global company marketing; no U.S. producing entity, state authority, issuer or placement terms. Accessed 2026-09-29.
- About | Aon. Aon; Aon’s company overview and Our Capabilities list distinguish Risk Capital from Human Capital and describe group-wide capabilities. General company identity context; not placement, authority or insurer evidence. Accessed 2026-09-28.
- Broking and Risk Transfer | Aon. Aon; Explore Our Risk Transfer Offerings; Property & Casualty, Specialty, Management Liability and industry listings. Broad catalogue only; not sufficient for a dedicated line record by itself. Accessed 2026-09-28.
- Financial and Executive Risks | Insurance Broking & Risk Management. Aon; Financial Services Group Overview; D&O, fiduciary, EPL and crime references plus policy design and insurer market knowledge. Broad category/source context; not sufficient by itself to establish a separate U.S. product. Accessed 2026-09-28.
- Construction and Infrastructure Insurance and Risk Management. Aon; Lines 125–126: global construction practice designing and placing risk solutions; lines 137–156: industry-specific property, casualty, construction professional liability, subcontractor default and construction surety offerings; lines 167–195: global coverage areas explicitly list Builders Risk, general/umbrella/excess liability within construction liability, workers compensation and surety among other categories. These are construction-practice marketing statements; page does not provide U.S. state or placement availability for each line. Accessed 2026-09-29.
At-Bay Official Website
- Cyber, Tech E&O & Professional Liability Insurance. At-Bay; Product cards and agency disclosure. Accessed 2026-09-16.
- Tech E&O Insurance Coverage and Policy Highlights. At-Bay; Tech E&O Coverage Highlights; Primary & Excess Appetite; footnotes 1–7; state disclaimer. Accessed 2026-09-16.
- Cyber Insurance. At-Bay; Cyber Coverage Highlights; Primary & Excess Appetite. Accessed 2026-09-16.
- MPL Insurance: Coverage Highlights & Appetite. At-Bay; MPL Coverage Highlights; MPL Appetite; state restrictions. Accessed 2026-09-16.
- Licenses. At-Bay; Producer introduction; California row; agency and surplus-lines footer. Accessed 2026-09-16.
- Broker Platform. At-Bay; How it works: Create a quote, Customize your quote, Bind your policy, Manage renewals; FAQs. Accessed 2026-09-16.
- At-Bay Stance. At-Bay; Real Protection Against Real Threats; Endpoint, Email, MXDR; footnotes 1 and 3–6. Accessed 2026-09-16.
- Claims Handling. At-Bay; At-Bay Cyber Incident Roadmap; The At-Bay Claims Team. Accessed 2026-09-16.
- Response & Recovery. At-Bay; Minimize Downtime with One Partner; integration with claims process. Accessed 2026-09-16.
- Terms of Service. At-Bay; US terms effective April 11, 2023: Insurance Product Terms; Payment Policy; Service. Accessed 2026-09-16.
- At-Bay Begins Issuing Policies on its own E&S Paper. At-Bay; August 9, 2023 release: opening paragraph and new-business transition effective August 7, 2023. Accessed 2026-09-16.
- At-Bay Surplus Tech E&O Appetite Guide. At-Bay; Pages 1–2; September 2023 copyright; revenue and limit statements; Restricted classes. Accessed 2026-09-16.
- At-Bay Doubles Miscellaneous Professional Liability Appetite. At-Bay; September 28, 2023 release: final paragraph before Media Contacts. Accessed 2026-09-16.
