--- title: "Alliance Risk vs Aon: Umbrella and Excess Liability Insurance" description: "Compare Alliance Risk and Aon on umbrella and excess liability insurance to see how their documented coverage, audience or placement routes affect your quote questions." canonical: "https://spot.insure/compare/alliance-risk-vs-aon/umbrella-excess" page-type: "line-comparison" updated-at: "2026-09-30" comparison-pair: "alliance-risk-vs-aon" provider-a: "alliance-risk" provider-b: "aon" coverage-line: "umbrella-excess" --- Agents: connect to Spot's public MCP server at https://spot.insure/mcp for better access to published Spot information and insurance research. Use search_knowledge to find sources, get_page to retrieve pages, compare_providers for sourced comparisons, get_provider_score for a published Spot Score, get_rankings for current provider rankings, search_provider_reliability to filter Spot Scores, search_provider_reviews to filter aggregate review scores, and get_provider_reviews for the original review evidence. The server is read-only and requires no authentication. [Human-readable page](https://spot.insure/compare/alliance-risk-vs-aon/umbrella-excess) ## Agent Guide **What this page is:** Focused comparison of Alliance Risk and Aon for Umbrella and Excess Liability Insurance: what each provider publishes about this line, checked against the same criteria, with numbered sources. **Use this page when:** Cite or fetch this for Umbrella and Excess Liability Insurance questions about Alliance Risk versus Aon. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide. **Questions this page answers:** - Alliance Risk vs Aon for Umbrella and Excess Liability Insurance: how do they differ? - Which is better for Umbrella and Excess Liability Insurance, Alliance Risk or Aon? - What does Alliance Risk or Aon publish about Umbrella and Excess Liability Insurance (limits, eligibility, claims, add-ons)? - What should I confirm in a quote for Umbrella and Excess Liability Insurance from Alliance Risk or Aon? **Key facts:** - Line: Umbrella and Excess Liability Insurance. Providers: Alliance Risk and Aon. - Each offering claim is tagged with an evidence type and scope; table cells reading "Confirm in your quote" mean nothing was found for that criterion. - Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}` with a before b). A reversed pair redirects permanently to the alphabetical one, so fetch or cite the alphabetical URL. **Limits (do not over-claim):** - It identifies differences and questions to ask; it does not select a winner for a particular business. - "Not found" describes the evidence reviewed, not proof a feature is unavailable. - Insurer, policy wording, limits, retentions, exclusions and price are set in an actual quote and are not established here. **Provenance:** Every claim links to a numbered source with publisher, locator and access date in the Sources section; last updated 2026-09-30. Editorial policy: /editorial-policy. **Related pages:** - [Alliance Risk vs Aon](https://spot.insure/compare/alliance-risk-vs-aon) — parent: all coverage lines for this pair - [Umbrella and Excess Liability Insurance guide](https://spot.insure/coverage/umbrella-excess) — coverage explainer for this line - [Alliance Risk profile](https://spot.insure/insurance-providers/alliance-risk) — provider profile (evidence) - [Aon profile](https://spot.insure/insurance-providers/aon) — provider profile (evidence) - [Alliance Risk vs Aon Builders Risk Insurance](https://spot.insure/compare/alliance-risk-vs-aon/builders-risk) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Cargo and Transit Insurance](https://spot.insure/compare/alliance-risk-vs-aon/cargo-transit) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Commercial Auto Insurance](https://spot.insure/compare/alliance-risk-vs-aon/commercial-auto) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Commercial Property Insurance](https://spot.insure/compare/alliance-risk-vs-aon/commercial-property) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Crime Insurance](https://spot.insure/compare/alliance-risk-vs-aon/crime) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-aon/cyber) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon D&O Insurance](https://spot.insure/compare/alliance-risk-vs-aon/directors-officers) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Employment Practices Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/employment-practices) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Fiduciary Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/fiduciary) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon General Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/general-liability) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Management Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/management-liability) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-aon/professional-errors-omissions) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Aon Workers’ Compensation Insurance](https://spot.insure/compare/alliance-risk-vs-aon/workers-compensation) — sibling comparison (other line, or other pair for this line) - [AIG vs Alliance Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-alliance-risk/umbrella-excess) — sibling comparison (other line, or other pair for this line) - [AIG vs Aon Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-aon/umbrella-excess) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Amelia Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-amelia-risk/umbrella-excess) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs The Baldwin Group Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-baldwin/umbrella-excess) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-berkshire-hathaway-specialty-insurance/umbrella-excess) — sibling comparison (other line, or other pair for this line) - [Alliance Risk vs biBerk Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-biberk/umbrella-excess) — sibling comparison (other line, or other pair for this line) # Alliance Risk vs Aon: How Do They Compare for Umbrella and Excess Liability Insurance? Compare Alliance Risk and Aon on umbrella and excess liability insurance to see how their documented coverage, audience or placement routes affect your quote questions. ## How to Use the Alliance Risk vs Aon Umbrella and Excess Liability Insurance Comparison Use this comparison to evaluate Alliance Risk and Aon for Umbrella and Excess Liability Insurance against the same documented criteria. It identifies differences and questions to confirm; it does not select a winner for a particular business. Offering claims are what each provider publishes about this line unless marked otherwise. “Not found” describes the evidence reviewed, not proof that a feature is unavailable. Confirm the insurer, policy wording, limits, retentions, exclusions and cost in an actual quote. ## Alliance Risk vs Aon Umbrella and Excess Liability Insurance Summary Alliance Risk: distinguishes umbrella coverage, which it says can broaden protection to some claims not in the underlying policy, from excess coverage, which strictly follows the underlying policy's terms and only extends its limits; both exclude claims already excluded by the underlying policy, first-party property damage, workers' compensation claims and intentional or criminal acts. Aon: umbrella and Excess Liability as separate coverage areas within construction liability. The page does not specify an attachment point, underlying policy, limits or terms for a particular placement. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") ## What Is Alliance Risk? Alliance Risk suits tech startups from pre-seed through IPO that want a broker to review their tech E&O policy for free and shop specialist insurers; if you want to buy online in minutes, use a digital insurer. Quotes take 24 hours to ten business days, depending on your risk. [1](https://joinalliancerisk.com/technology-insurance/ "Technology Insurance") [2](https://joinalliancerisk.com/technology-errors-omissions-insurance-tech-eo/ "Tech E&O Insurance") [3](https://joinalliancerisk.com/get-a-quote/ "Get a Quote") [Alliance Risk profile](https://spot.insure/insurance-providers/alliance-risk) ## What Is Aon? Aon’s U.S. Commercial Risk terms describe brokerage for certain insurance programs, while its Middle Market page describes a dedicated practice for mid-sized organizations across North America. The public materials reviewed do not identify the licensed producer or insurer for a particular placement. Ask which entity will produce each line and which insurer will issue the policy; request jurisdiction details for the proposed placement and ask how compensation and claim notice work for your account. [5](https://www.aon.com/en/about/leadership-and-governance/brokerage-terms-of-service-for-commercial-risk-solutions-us "Commercial Risk Solutions U.S. Brokerage Terms of Service") [6](https://www.aon.com/en/capabilities/middle-market-clients "Middle Market Clients") [Aon profile](https://spot.insure/insurance-providers/aon) ## What Is Umbrella and Excess Liability Insurance? Umbrella or excess insurance adds liability limits above the policies named in the quote after a covered claim exhausts their limits. It may fit if a contract sets higher limits; check which primary policies are listed and any gaps between them. [8](https://www.iii.org/publication/insuring-your-business-small-business-owners-guide-to-insurance/specific-coverages/liability-insurance "Liability Insurance") [9](https://www.insurance.ca.gov/01-consumers/105-type/95-guides/09-comm/commercialguide.cfm "Commercial Insurance Guide") [10](https://www.insurance.ca.gov/0200-industry/0050-renew-license/0200-requirements/casualty/lines-of-ins.cfm "Lines of Insurance") [11](https://www.coverdash.com/coverage "Coverage Hub") [12](https://kinro.com/products "Products") ## What Are the Key Differences Between Alliance Risk and Aon Umbrella and Excess Liability Insurance? ### How the excess layer follows underlying coverage Alliance Risk describes distinguishes umbrella coverage, which it says can broaden protection to some claims not in the underlying policy, from excess coverage, which strictly follows the underlying policy's terms and only extends its limits; both exclude claims already excluded by the underlying policy, first-party property damage, workers' compensation claims and intentional or criminal acts. Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. Ask whether the proposed form follows the underlying wording or adds a stated feature, and identify the policies and exhaustion points it requires. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") ### Capacity and buyer segment Alliance Risk describes alliance Risk's risk-management guidance for this line includes contractual risk-transfer agreements with vendors and subcontractors, periodic reviews of limits against business growth, and working with a broker to model catastrophic-loss scenarios. Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. Compare the stated industry appetite and available capacity with your operations, then request the actual limit and attachment point for your account. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") ### Broker or insurer service route Alliance Risk describes umbrella and excess liability coverage that sits above a client's underlying general liability, auto liability or employer's liability policies, describing its role as arranging this additional layer rather than underwriting it. Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. Ask who handles underwriting questions, renewal changes and claims advocacy for the layer. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") ## What Should You Confirm in Alliance Risk and Aon Umbrella and Excess Liability Insurance Quotes? - Ask Alliance Risk to confirm the quoted coverage trigger, underlying policies and exclusions; its offering says distinguishes umbrella coverage, which it says can broaden protection to some claims not in the underlying policy, from excess coverage, which strictly follows the underlying policy's terms and only extends its limits; both exclude claims already excluded by the underlying policy, first-party property damage, workers' compensation claims and intentional or criminal acts. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") - Ask Aon to confirm the quoted coverage trigger, underlying policies and exclusions; its offering says umbrella and Excess Liability as separate coverage areas within construction liability. The page does not specify an attachment point, underlying policy, limits or terms for a particular placement. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") ## Alliance Risk vs Aon Umbrella and Excess Liability Insurance Compared | Criteria | Alliance Risk Umbrella & Excess Liability Insurance | Aon Umbrella and Excess Liability brokerage and risk-advisory offering | | --- | --- | --- | | Role in This Line | Alliance Risk places umbrella and excess liability coverage that sits above a client's underlying general liability, auto liability or employer's liability policies, describing its role as arranging this additional layer rather than underwriting it. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Company-reported; scope: Umbrella & Excess Liability Insurance page..) | Aon says its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") (Evidence: Company-reported; scope: Aon’s global construction and infrastructure practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement..) | | Issuing Insurer | The reviewed umbrella/excess page does not name the insurers Alliance Risk places this coverage with. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Not publicly disclosed; scope: Umbrella & Excess Liability Insurance page as read on 2026-09-23; the issuing insurer depends on the specific placement..) | 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. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") (Evidence: Not found in reviewed sources; scope: 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..) | | Who It’s For | Alliance Risk says umbrella and excess coverage is commonly needed by construction firms, manufacturers and distributors, retailers and hospitality businesses, and logistics and transportation companies with large vehicle fleets. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Company-reported; scope: Umbrella & Excess Liability Insurance page, "Who Needs" section..) | Aon describes its global construction and infrastructure practice as serving contractors, owners, developers, engineers, architects, designers, financiers and investors, and says it works with organizations of varied sizes and complexity. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") (Evidence: Company-reported; scope: Audience described for Aon’s global construction and infrastructure practice. It does not establish U.S. state availability or underwriting eligibility for a placement..) | | Coverage Features | Alliance Risk distinguishes umbrella coverage, which it says can broaden protection to some claims not in the underlying policy, from excess coverage, which strictly follows the underlying policy's terms and only extends its limits; both exclude claims already excluded by the underlying policy, first-party property damage, workers' compensation claims and intentional or criminal acts. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Company-reported; scope: Umbrella & Excess Liability Insurance page, "What Is" and "What Does/Doesn't Cover" sections; the issued policy and declarations control actual terms..) | Aon lists Umbrella and Excess Liability as separate coverage areas within construction liability. The page does not specify an attachment point, underlying policy, limits or terms for a particular placement. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") (Evidence: Company-reported; scope: 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..) | | Limits and Retentions | Alliance Risk describes umbrella/excess limits typically starting at $1M and extending to $25M or more, with indicative annual costs of $500–$1,500 for a $1M policy at a small business up to $10,000+ for large or high-risk operations. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Company-reported; scope: Umbrella & Excess Liability Insurance page, cost section; illustrative ranges, not a specific quote..) | 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. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") (Evidence: Not publicly disclosed; scope: Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed..) | | Risk Services | Alliance Risk's risk-management guidance for this line includes contractual risk-transfer agreements with vendors and subcontractors, periodic reviews of limits against business growth, and working with a broker to model catastrophic-loss scenarios. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Company-reported; scope: Umbrella & Excess Liability Insurance page, "Risk Management Tips" section..) | Aon describes project risk-advisory services to understand project-specific risks and develop risk-transfer, management or mitigation strategies. It also describes a global construction team and market access. These are company-reported brokerage and advisory services, not coverage benefits. [7](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") (Evidence: Company-reported; scope: Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated..) | | How to Apply | The reviewed umbrella/excess page does not describe a line-specific quote submission checklist beyond the general "Get a Quote" contact form used across Alliance Risk's product pages. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Not found in reviewed sources; scope: Umbrella & Excess Liability Insurance page as read on 2026-09-23..) | Confirm in your quote. | | Claims Support | The reviewed umbrella/excess page does not describe a claims-handling or claims-advocacy process specific to this line. [4](https://joinalliancerisk.com/umbrella-excess-liability-insurance/ "Umbrella & Excess Liability Insurance") (Evidence: Not found in reviewed sources; scope: Umbrella & Excess Liability Insurance page as read on 2026-09-23..) | Confirm in your quote. | ## Related Pages for Alliance Risk vs Aon Umbrella and Excess Liability - [Alliance Risk vs Aon](https://spot.insure/compare/alliance-risk-vs-aon): all coverage lines, business roles, service and claims. - [What Is Umbrella and Excess Liability Insurance?](https://spot.insure/coverage/umbrella-excess): Umbrella or excess insurance can add liability limits above selected underlying policies when a covered claim exceeds them; compare the schedule and any gaps. - [Alliance Risk vs Aon Builders Risk Insurance](https://spot.insure/compare/alliance-risk-vs-aon/builders-risk) - [Alliance Risk vs Aon Cargo and Transit Insurance](https://spot.insure/compare/alliance-risk-vs-aon/cargo-transit) - [Alliance Risk vs Aon Commercial Auto Insurance](https://spot.insure/compare/alliance-risk-vs-aon/commercial-auto) - [Alliance Risk vs Aon Commercial Property Insurance](https://spot.insure/compare/alliance-risk-vs-aon/commercial-property) - [Alliance Risk vs Aon Crime Insurance](https://spot.insure/compare/alliance-risk-vs-aon/crime) - [Alliance Risk vs Aon Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-aon/cyber) - [Alliance Risk vs Aon D&O Insurance](https://spot.insure/compare/alliance-risk-vs-aon/directors-officers) - [Alliance Risk vs Aon Employment Practices Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/employment-practices) - [Alliance Risk vs Aon Fiduciary Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/fiduciary) - [Alliance Risk vs Aon General Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/general-liability) - [Alliance Risk vs Aon Management Liability Insurance](https://spot.insure/compare/alliance-risk-vs-aon/management-liability) - [Alliance Risk vs Aon Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-aon/professional-errors-omissions) - [Alliance Risk vs Aon Workers’ Compensation Insurance](https://spot.insure/compare/alliance-risk-vs-aon/workers-compensation) - [AIG vs Alliance Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-alliance-risk/umbrella-excess) - [AIG vs Aon Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-aon/umbrella-excess) - [Alliance Risk vs Amelia Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-amelia-risk/umbrella-excess) - [Alliance Risk vs The Baldwin Group Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-baldwin/umbrella-excess) - [Alliance Risk vs Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-berkshire-hathaway-specialty-insurance/umbrella-excess) - [Alliance Risk vs biBerk Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-biberk/umbrella-excess) ## Sources for Alliance Risk vs Aon ### Sources About Alliance Risk 1. [Technology Insurance](https://joinalliancerisk.com/technology-insurance/). Alliance Risk; What is Technology Insurance?; Types of Technology; Types of Coverage; startup placement introduction; quote documents and process. Accessed 2026-09-16. 2. [Tech E&O Insurance](https://joinalliancerisk.com/technology-errors-omissions-insurance-tech-eo/). Alliance Risk; Opening placement description; Get Your Tech E&O Risk Review; What We Need for Your Quote; Policy Review. Accessed 2026-09-16. 3. [Get a Quote](https://joinalliancerisk.com/get-a-quote/). Alliance Risk; Request form; Prefer to Call?; Why Alliance Risk? section. Accessed 2026-09-16. 4. [Umbrella & Excess Liability Insurance](https://joinalliancerisk.com/umbrella-excess-liability-insurance/). Alliance Risk; What Is Umbrella & Excess Liability Insurance?; Who Needs Umbrella & Excess Liability Insurance?; What Does/Doesn't Umbrella & Excess Liability Insurance Cover?; How Much Does Umbrella & Excess Liability Insurance Cost?; Risk Management Tips. Accessed 2026-09-23. ### Sources About Aon 5. [Commercial Risk Solutions U.S. Brokerage Terms of Service](https://www.aon.com/en/about/leadership-and-governance/brokerage-terms-of-service-for-commercial-risk-solutions-us). 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. 6. [Middle Market Clients](https://www.aon.com/en/capabilities/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. 7. [Construction and Infrastructure Insurance and Risk Management](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management). Aon; Construction client audience and global placement role, lines 123–126; offering descriptions lines 135–156; coverage-area taxonomy lines 167–195; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule.. Accessed 2026-09-30. ### Sources for the Umbrella and Excess Liability Insurance Guide 8. [Liability Insurance](https://www.iii.org/publication/insuring-your-business-small-business-owners-guide-to-insurance/specific-coverages/liability-insurance). Insurance Information Institute; Heading Umbrella Liability Insurance; sentence Umbrella Liability—also known as Excess Liability Insurance; underlying policies listed with limits; typically GL, auto and employers’ liability; starts when a covered loss exhausts the primary per occurrence limit; Most umbrella policies exclude EPL, professional liability, product recall, workers compensation, asbestos, pollution, war and terrorism. Accessed 2026-09-16. 9. [Commercial Insurance Guide](https://www.insurance.ca.gov/01-consumers/105-type/95-guides/09-comm/commercialguide.cfm). California Department of Insurance; Commercial Umbrella; excess over a basic liability policy; auto/CGL/WC or any liability policy can be covered; may respond if basic policy not in force or for gaps; SIR when no underlying. Accessed 2026-09-16. 10. [Lines of Insurance](https://www.insurance.ca.gov/0200-industry/0050-renew-license/0200-requirements/casualty/lines-of-ins.cfm). California Department of Insurance; Umbrella or Excess Liability Policy: excess limits over existing liability; may provide additional coverages not provided by underlying policies. Accessed 2026-09-16. 11. [Coverage Hub](https://www.coverdash.com/coverage). Coverdash; Excess & Specialty: Umbrella; Excess Liability. Accessed 2026-09-16. 12. [Products](https://kinro.com/products). Kinro; 09 Umbrella/Excess: additional limits above scheduled underlying policies; when to review; reviewed with. Accessed 2026-09-16. Updated 2026-09-30. Spot, a product of Tools for Enlightenment, publishes this research and works in the commercial insurance market. The comparison applies the same criteria to both providers. [Editorial policy](https://spot.insure/editorial-policy). To suggest a correction, [contact Spot](https://spot.insure/contact) with the page URL and supporting source. ## Alliance Risk Review Scores for 2026 Review Score: not enough ratings. Alliance Risk has no customer ratings on the review sites we checked, so there's no Review Score yet. That says nothing bad about the company; it means you'll need to ask for references. Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/alliance-risk/reviews). ## Aon Review Scores for 2026 Review Score: 6.1 / 10 from 3 rated sources, equally weighted. 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. - J.D. Power: Aon study score 822 (out of 1000). Historical 2017 large-commercial-broker study; U.S. and Canada commercial insurance decision-makers at large organizations. J.D. Power reports 2,506 evaluations across the study, not Aon-specific responses; the Aon respondent count is not stated. Period: 2017 study; ranked 3rd among large commercial brokers; study-wide population 2,506, not Aon review count. Checked 2026-09-29. [Diversity of Offerings Becomes Key Differentiator for Large Commercial Insurers, JD Power Finds](https://www.jdpower.com/business/press-releases/jd-power-2017-large-commercial-insurance-study) - Trustpilot: TrustScore 1.2 (out of 5); 782 reviews. Global www.aon.com profile merged with other Aon profiles; mixed experiences include pensions, travel, professional indemnity and Australian business quotation service. The two latter complaints are individual unverified allegations, not evidence of U.S. commercial-placement outcomes or insurer fault. Trustpilot says reviews may not be representative because the company has not recently invited reviews. Period: Displayed 2026-09-29; page separately showed 198 reviews in the last 12 months. Checked 2026-09-29. [Aon Reviews](https://www.trustpilot.com/review/www.aon.com) - BBB: BBB business grade B− (BBB letter grade; stated reason: failure to respond to two filed complaints). BBB of Chicago & Northern Illinois profile for Aon plc; the business grade is BBB’s own measure, not customer stars. Checked 2026-09-29. [Aon plc | BBB Business Profile](https://www.bbb.org/us/il/chicago/profile/insurance-companies/aon-plc-0654-5291) - BBB: BBB customer review average 1.6 (out of 5); 5 reviews. BBB of Chicago & Northern Illinois customer reviews for Aon plc; some reviews are about employee-benefit and medical-expense issues. Period: checked 2026-09-29. Checked 2026-09-29. [Aon plc | BBB Reviews](https://www.bbb.org/us/il/chicago/profile/insurance-companies/aon-plc-0654-5291/customer-reviews) Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/aon/reviews). ## Agent and Developer Resources - [Markdown page](https://spot.insure/compare/alliance-risk-vs-aon/umbrella-excess.md) - [Developer resources](https://spot.insure/developers) - [Public MCP server](https://spot.insure/mcp) - [MCP server manifest](https://spot.insure/server.json) - [OpenAPI description](https://spot.insure/openapi.json) - [Public page index](https://spot.insure/llms.txt)