---
title: "Aon vs USI Insurance Services: Surety Bonds"
description: "Compare Aon and USI Insurance Services on surety bonds to see how their documented coverage, audience or placement routes affect your quote questions."
canonical: "https://spot.insure/compare/aon-vs-usi/surety-bonds"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "aon-vs-usi"
provider-a: "aon"
provider-b: "usi"
coverage-line: "surety-bonds"
---

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/aon-vs-usi/surety-bonds)

## Agent Guide

**What this page is:** Focused comparison of Aon and USI Insurance Services for Surety Bonds: what each provider publishes about this line, checked against the same criteria, with numbered sources.

**Use this page when:** Cite or fetch this for Surety Bonds questions about Aon versus USI Insurance Services. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- Aon vs USI Insurance Services for Surety Bonds: how do they differ?
- Which is better for Surety Bonds, Aon or USI Insurance Services?
- What does Aon or USI Insurance Services publish about Surety Bonds (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Surety Bonds from Aon or USI Insurance Services?

**Key facts:**
- Line: Surety Bonds. Providers: Aon and USI Insurance Services.
- 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:**
- [Aon vs USI Insurance Services](https://spot.insure/compare/aon-vs-usi) — parent: all coverage lines for this pair
- [Surety Bonds guide](https://spot.insure/coverage/surety-bonds) — coverage explainer for this line
- [Aon profile](https://spot.insure/insurance-providers/aon) — provider profile (evidence)
- [USI Insurance Services profile](https://spot.insure/insurance-providers/usi) — provider profile (evidence)
- [Aon vs USI Insurance Services Commercial Property Insurance](https://spot.insure/compare/aon-vs-usi/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Crime Insurance](https://spot.insure/compare/aon-vs-usi/crime) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Cyber Insurance](https://spot.insure/compare/aon-vs-usi/cyber) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services D&O Insurance](https://spot.insure/compare/aon-vs-usi/directors-officers) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-usi/employment-practices) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Fiduciary Liability Insurance](https://spot.insure/compare/aon-vs-usi/fiduciary) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Management Liability Insurance](https://spot.insure/compare/aon-vs-usi/management-liability) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-usi/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs USI Insurance Services Workers’ Compensation Insurance](https://spot.insure/compare/aon-vs-usi/workers-compensation) — sibling comparison (other line, or other pair for this line)
- [Aon vs The Baldwin Group Surety Bonds](https://spot.insure/compare/aon-vs-baldwin/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Aon vs Berkshire Hathaway Specialty Insurance Surety Bonds](https://spot.insure/compare/aon-vs-berkshire-hathaway-specialty-insurance/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Aon vs Chubb Surety Bonds](https://spot.insure/compare/aon-vs-chubb/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Surety Bonds](https://spot.insure/compare/aon-vs-cna/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Aon vs Coverdash Surety Bonds](https://spot.insure/compare/aon-vs-coverdash/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Aon vs Embroker Surety Bonds](https://spot.insure/compare/aon-vs-embroker/surety-bonds) — sibling comparison (other line, or other pair for this line)

# Aon vs USI Insurance Services: How Do They Compare for Surety Bonds?

Compare Aon and USI Insurance Services on surety bonds to see how their documented coverage, audience or placement routes affect your quote questions.

## How to Use the Aon vs USI Insurance Services Surety Bonds Comparison

Use this comparison to evaluate Aon and USI Insurance Services for Surety Bonds 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.

## Aon vs USI Insurance Services Surety Bonds Summary

Aon: construction surety bonds and describes them as financial security intended to guarantee contractor performance and payment to specified subcontractors, laborers and material suppliers. Actual bond obligations depend on the bond form and its terms. USI Insurance Services: USI lists bid bonds, performance and payment bonds (domestic and international), established surety programs, commercial surety and financial obligations, and subcontractor default insurance among its construction and surety products. [3](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds")

## 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. [1](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") [2](https://www.aon.com/en/capabilities/middle-market-clients "Middle Market Clients")

[Aon profile](https://spot.insure/insurance-providers/aon)

## What Is USI Insurance Services?

USI suits software and hardware companies from seed stage through IPO seeking consultative broker support; buyers wanting a self-serve quote should compare digital agencies. Insurer commissions are typical and contingent compensation may also apply. [4](https://www.usi.com/about-usi "The Power of ONE") [5](https://www.usi.com/property-casualty/technology/ "Technology Insurance") [6](https://www.usi.com/commissions-fees/ "Commissions and Fees")

[USI Insurance Services profile](https://spot.insure/insurance-providers/usi)

## What Are Surety Bonds?

A surety bond guarantees that your business meets a specific obligation to a customer, contracting party or government agency. If a contract, license or permit requires one, get its exact form and amount; a bond is not insurance for your own losses. [8](https://content.naic.org/glossary-insurance-terms "Glossary of Insurance Terms") [9](https://www.sba.gov/funding-programs/surety-bonds "Surety bonds") [10](https://www.law.cornell.edu/uscode/text/40/3131 "40 U.S. Code § 3131 — Bonds of contractors of public buildings or works") [11](https://www.chubb.com/us-en/surety.html "Surety Bonds") [12](https://www.harperinsure.com/coverages/surety-bonds "Surety Bonds Insurance")

## What Are the Key Differences Between Aon and USI Insurance Services Surety Bonds?

### Bond forms for the stated obligation

Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For construction surety, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. USI Insurance Services describes USI lists bid bonds, performance and payment bonds (domestic and international), established surety programs, commercial surety and financial obligations, and subcontractor default insurance among its construction and surety products. A bond protects the obligee under the named obligation, so compare the required form and conditions against the contract or license before choosing a route. [3](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds")

### Applicant profile and service model

Aon identifies 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. USI Insurance Services identifies USI says its surety practice has a long history serving general contractors, trade contractors, highway/heavy construction projects, construction managers, developers and design-builders in the public and private sectors, and that its surety network also has experience outside construction. A contractor or business should ask whether its trade, financial profile and bond amount fit the stated market and what documentation will be needed. [3](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds")

### How the application moves

Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For construction surety, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. USI Insurance Services describes USI directs contractors and other prospective surety clients to email USI’s surety inquiry address or contact a local USI office. Confirm the submission deadline, required indemnitors and how the executed bond reaches the obligee. [3](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management") [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds")

## What Should You Confirm in Aon and USI Insurance Services Surety Bonds Quotes?

- Ask Aon to confirm the quoted bond form, obligee and indemnity terms; its offering says construction surety bonds and describes them as financial security intended to guarantee contractor performance and payment to specified subcontractors, laborers and material suppliers. Actual bond obligations depend on the bond form and its terms. [3](https://www.aon.com/en/capabilities/risk-transfer/construction-and-infrastructure-insurance-and-risk-management "Construction and Infrastructure Insurance and Risk Management")
- Ask USI Insurance Services to confirm the quoted bond form, obligee and indemnity terms; its offering says USI lists bid bonds, performance and payment bonds (domestic and international), established surety programs, commercial surety and financial obligations, and subcontractor default insurance among its construction and surety products. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds")

## Aon vs USI Insurance Services Surety Bonds Compared

| Criteria | Aon Construction Surety brokerage and risk-advisory offering | USI Surety Bond — Contract, Commercial and International Surety |
| --- | --- | --- |
| Role in This Line | Aon says its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For construction surety, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. [3](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..) | USI is a surety bond broker, not a surety. It says it is one of the leading domestic and international surety brokers and negotiates bonding capacity and terms with surety underwriters on a client's behalf. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Company-reported; scope: Surety Bond practice page..) |
| Issuing 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. [3](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..) | USI does not name surety companies on its practice page; it describes placing bonds through its surety-market relationships rather than a fixed panel. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Not publicly disclosed; scope: Page as read on 2026-09-23..) |
| Who It’s For | 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. [3](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..) | USI says its surety practice has a long history serving general contractors, trade contractors, highway/heavy construction projects, construction managers, developers and design-builders in the public and private sectors, and that its surety network also has experience outside construction. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Company-reported; scope: Company description of client base..) |
| Coverage Features | Aon lists construction surety bonds and describes them as financial security intended to guarantee contractor performance and payment to specified subcontractors, laborers and material suppliers. Actual bond obligations depend on the bond form and its terms. [3](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..) | USI lists bid bonds, performance and payment bonds (domestic and international), established surety programs, commercial surety and financial obligations, and subcontractor default insurance among its construction and surety products. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Company-reported; scope: Practice page product list; actual bond forms and terms are set by the surety and obligee..) |
| Limits and Retentions | 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. [3](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..) | USI does not publish standard bonding-capacity figures; it cites individual case studies (a general contractor's bonding limits supporting a $10,000,000 revenue increase, and a mechanical contractor whose surety line supported $110,000,000 in revenue) rather than a general limit range. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Not publicly disclosed; scope: Case-study figures on the page are specific to those named accounts, not a published capacity table..) |
| Risk Services | 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. [3](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..) | USI describes a proprietary bond submission process that summarizes a client's underwriting and operational information alongside its own analysis and recommendations, and says its surety professionals help clients present their financials to the surety market and negotiate terms. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Company-reported; scope: Company description of its submission methodology..) |
| How to Apply | Confirm in your quote. | USI directs contractors and other prospective surety clients to email pcinquiries@usi.com or contact a local USI office. [7](https://www.usi.com/property-casualty/surety-bond/ "Surety Bond-Contract, Commercial and International Surety Bonds") (Evidence: Company-reported; scope: Contact instructions on the Surety Bond practice page..) |

## Related Pages for Aon vs USI Insurance Services Surety Bonds

- [Aon vs USI Insurance Services](https://spot.insure/compare/aon-vs-usi): all coverage lines, business roles, service and claims.
- [What Are Surety Bonds?](https://spot.insure/coverage/surety-bonds): A surety bond guarantees a specific obligation your business owes to a customer, contracting party or agency; it does not insure your own losses.
- [Aon vs USI Insurance Services Commercial Property Insurance](https://spot.insure/compare/aon-vs-usi/commercial-property)
- [Aon vs USI Insurance Services Crime Insurance](https://spot.insure/compare/aon-vs-usi/crime)
- [Aon vs USI Insurance Services Cyber Insurance](https://spot.insure/compare/aon-vs-usi/cyber)
- [Aon vs USI Insurance Services D&O Insurance](https://spot.insure/compare/aon-vs-usi/directors-officers)
- [Aon vs USI Insurance Services Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-usi/employment-practices)
- [Aon vs USI Insurance Services Fiduciary Liability Insurance](https://spot.insure/compare/aon-vs-usi/fiduciary)
- [Aon vs USI Insurance Services Management Liability Insurance](https://spot.insure/compare/aon-vs-usi/management-liability)
- [Aon vs USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-usi/professional-errors-omissions)
- [Aon vs USI Insurance Services Workers’ Compensation Insurance](https://spot.insure/compare/aon-vs-usi/workers-compensation)
- [Aon vs The Baldwin Group Surety Bonds](https://spot.insure/compare/aon-vs-baldwin/surety-bonds)
- [Aon vs Berkshire Hathaway Specialty Insurance Surety Bonds](https://spot.insure/compare/aon-vs-berkshire-hathaway-specialty-insurance/surety-bonds)
- [Aon vs Chubb Surety Bonds](https://spot.insure/compare/aon-vs-chubb/surety-bonds)
- [Aon vs CNA Surety Bonds](https://spot.insure/compare/aon-vs-cna/surety-bonds)
- [Aon vs Coverdash Surety Bonds](https://spot.insure/compare/aon-vs-coverdash/surety-bonds)
- [Aon vs Embroker Surety Bonds](https://spot.insure/compare/aon-vs-embroker/surety-bonds)

## Sources for Aon vs USI Insurance Services Surety Bonds

### Sources About Aon

1. [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.
2. [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.
3. [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 About USI Insurance Services

4. [The Power of ONE](https://www.usi.com/about-usi). USI Insurance Services; History, client-count, nationwide office, and P&C / benefits / personal risk / retirement description. Accessed 2026-09-16.
5. [Technology Insurance](https://www.usi.com/property-casualty/technology/). USI Insurance Services; Technology practice client types, seed-to-IPO range, and listed insurance placement lines including PrivaSafe. Accessed 2026-09-16.
6. [Commissions and Fees](https://www.usi.com/commissions-fees/). USI Insurance Services; Licensed-producer authority, insurer-paid commission default, contingent compensation, and client request right. Accessed 2026-09-16.
7. [Surety Bond-Contract, Commercial and International Surety Bonds](https://www.usi.com/property-casualty/surety-bond/). USI Insurance Services; USI's Surety team provides a full suite of surety bond services...Contract, Commercial and International Surety solutions; long history...providing substantial surety credit in the construction industry; USI's proprietary bond submission process; USI's construction and surety products include: Bid Bonds, Performance & Payment Bonds..., Establish Surety Programs, Commercial Surety and Financial Obligations, Subcontractor Default Insurance (SDI); CASE STUDY: 50% Revenue Increase; CASE STUDY: $110,000,000 in Revenues. Accessed 2026-09-23.

### Sources for the Surety Bonds Guide

8. [Glossary of Insurance Terms](https://content.naic.org/glossary-insurance-terms). National Association of Insurance Commissioners; Surety Bond; Fidelity. Accessed 2026-09-16.
9. [Surety bonds](https://www.sba.gov/funding-programs/surety-bonds). U.S. Small Business Administration; Opening guarantee of work completion; Contract or commercial bonds; Bid, Payment, Performance, Ancillary; Eligibility > credit, capacity, and character. Accessed 2026-09-16.
10. [40 U.S. Code § 3131 — Bonds of contractors of public buildings or works](https://www.law.cornell.edu/uscode/text/40/3131). Legal Information Institute, Cornell Law School, reproducing 40 U.S.C. § 3131; §3131(b) Type of Bonds Required — performance bond and payment bond. Accessed 2026-09-16.
11. [Surety Bonds](https://www.chubb.com/us-en/surety.html). Chubb; Construction Surety Bonds (performance, payment, maintenance); Commercial Surety Bonds (license and permit, court, commercial contract). Accessed 2026-09-16.
12. [Surety Bonds Insurance](https://www.harperinsure.com/coverages/surety-bonds). Harper; What is Surety Bonds insurance?; A bond is not insurance; License & permit bonds; Contract bonds — bid, performance, and payment; Is a bond the same as insurance?. 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.

## 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).

## USI Insurance Services Review Scores for 2026

Review Score: 6.4 / 10 from 1 rated source, equally weighted.

USI’s public feedback is too sparse and office-specific for a firmwide verdict. Check the local team’s responsiveness and experience with your type of business.

- BBB: BBB complaint count 4. BBB business-profile grade is distinct from customer-review stars; branch/parent scope matters. Period: three years preceding access 2026-09-25. Checked 2026-09-25. [BBB result for USI Insurance Services](https://www.bbb.org/us/ny/valhalla/profile/insurance-agency/usi-insurance-services-0121-97856/complaints)
- Google reviews via Birdeye: Birdeye office listing rating from Google reviews 3.2 (5 stars); 9 reviews. One Louisville office listing, not firmwide. Birdeye shows Google-origin reviews (9) and 0 Birdeye-native reviews; this duplicates a Google source stream and is not independent of Google. Period: accessed 2026-09-25. Checked 2026-09-25. [USI office, Louisville, KY — Birdeye listing of Google reviews](https://reviews.birdeye.com/usi-insurance-145632496752867)

Reviewed 2026-09-25. [Read the sourced review](https://spot.insure/insurance-providers/usi/reviews).

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/aon-vs-usi/surety-bonds.md)
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