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

## Agent Guide

**What this page is:** Focused comparison of Aon and CNA 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 CNA. 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 CNA for Surety Bonds: how do they differ?
- Which is better for Surety Bonds, Aon or CNA?
- What does Aon or CNA publish about Surety Bonds (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Surety Bonds from Aon or CNA?

**Key facts:**
- Line: Surety Bonds. Providers: Aon and CNA.
- 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 CNA](https://spot.insure/compare/aon-vs-cna) — 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)
- [CNA profile](https://spot.insure/insurance-providers/cna) — provider profile (evidence)
- [Aon vs CNA Builders Risk Insurance](https://spot.insure/compare/aon-vs-cna/builders-risk) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Cargo and Transit Insurance](https://spot.insure/compare/aon-vs-cna/cargo-transit) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Commercial Auto Insurance](https://spot.insure/compare/aon-vs-cna/commercial-auto) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Commercial Property Insurance](https://spot.insure/compare/aon-vs-cna/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Crime Insurance](https://spot.insure/compare/aon-vs-cna/crime) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Cyber Insurance](https://spot.insure/compare/aon-vs-cna/cyber) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA D&O Insurance](https://spot.insure/compare/aon-vs-cna/directors-officers) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-cna/employment-practices) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Fiduciary Liability Insurance](https://spot.insure/compare/aon-vs-cna/fiduciary) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA General Liability Insurance](https://spot.insure/compare/aon-vs-cna/general-liability) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Kidnap and Ransom Insurance](https://spot.insure/compare/aon-vs-cna/kidnap-ransom) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Management Liability Insurance](https://spot.insure/compare/aon-vs-cna/management-liability) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-cna/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Umbrella and Excess Liability Insurance](https://spot.insure/compare/aon-vs-cna/umbrella-excess) — sibling comparison (other line, or other pair for this line)
- [Aon vs CNA Workers’ Compensation Insurance](https://spot.insure/compare/aon-vs-cna/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 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)
- [The Baldwin Group vs CNA Surety Bonds](https://spot.insure/compare/baldwin-vs-cna/surety-bonds) — sibling comparison (other line, or other pair for this line)

# Aon vs CNA: How Do They Compare for Surety Bonds?

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

## How to Use the Aon vs CNA Surety Bonds Comparison

Use this comparison to evaluate Aon and CNA 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 CNA 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. CNA: surety markets commercial and contract surety bonds in all 50 states, Canada and Puerto Rico. [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.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance")

## 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)

## CNA Small Business Insurance: Products, Agents and Service

CNA directs small-business buyers to independent agents and describes CNA Connect as a businessowners policy for more than 600 small-business classes. Issuer and availability vary by policy and state, so confirm both in a quote. [4](https://www.cna.com/solutions/small-business "Insurance for Small Businesses") [5](https://www.cna.com/products/cna-connect "CNA Connect Small Businessowners Policy (BOP) | CNA Insurance") [6](https://www.cna.com/cnadisclaimer/generaldisclaimer "General Disclaimer")

[CNA profile](https://spot.insure/insurance-providers/cna)

## 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 CNA 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. CNA describes surety markets commercial and contract surety bonds in all 50 states, Canada and Puerto Rico. 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.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance")

### 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. CNA identifies surety markets commercial and contract surety bonds in all 50 states, Canada and Puerto Rico. 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.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance")

### 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. CNA describes surety markets commercial and contract surety bonds in all 50 states, Canada and Puerto Rico. 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.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance")

## What Should You Confirm in Aon and CNA 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 CNA to confirm the quoted bond form, obligee and indemnity terms; its offering says surety markets commercial and contract surety bonds in all 50 states, Canada and Puerto Rico. [7](https://www.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance")

## Aon vs CNA Surety Bonds Compared

| Criteria | Aon Construction Surety brokerage and risk-advisory offering | CNA Surety and Commercial Bonds |
| --- | --- | --- |
| 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..) | Confirm in your quote. |
| 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..) | Confirm in your quote. |
| 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..) | CNA says its surety offering serves a range from individuals and small businesses to Fortune 1000 companies through agents and brokers. [7](https://www.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance") (Evidence: Company-reported; scope: Entity: CNA brand; issuing CNA subsidiary may vary by product/state Product: United States commercial insurance Jurisdiction: United States Research source scope: Commercial/contract surety; US plus Canada/Puerto Rico Claim limitation: Company-reported; policy wording, underwriting and jurisdiction-specific availability control..) |
| 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..) | CNA Surety markets commercial and contract surety bonds in all 50 states, Canada and Puerto Rico. [7](https://www.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance") (Evidence: Company-reported; scope: Entity: CNA brand; issuing CNA subsidiary may vary by product/state Product: United States commercial insurance Jurisdiction: United States Research source scope: Commercial/contract surety; US plus Canada/Puerto Rico Claim limitation: Company-reported; policy wording, underwriting and jurisdiction-specific availability control..) |
| 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..) | Confirm in your quote. |
| 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..) | Confirm in your quote. |
| How to Apply | Confirm in your quote. | CNA bONdLINE supports underwriting, issuance and reporting of transactional bonds. [7](https://www.cna.com/products/cna-surety "CNA Surety - Surety and Fidelity Bonds | CNA Insurance") (Evidence: Company-reported; scope: Entity: CNA brand; issuing CNA subsidiary may vary by product/state Product: United States commercial insurance Jurisdiction: United States Research source scope: Commercial/contract surety; US plus Canada/Puerto Rico Claim limitation: Company-reported; policy wording, underwriting and jurisdiction-specific availability control..) |

## Related Pages for Aon vs CNA Surety Bonds

- [Aon vs CNA](https://spot.insure/compare/aon-vs-cna): 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 CNA Builders Risk Insurance](https://spot.insure/compare/aon-vs-cna/builders-risk)
- [Aon vs CNA Cargo and Transit Insurance](https://spot.insure/compare/aon-vs-cna/cargo-transit)
- [Aon vs CNA Commercial Auto Insurance](https://spot.insure/compare/aon-vs-cna/commercial-auto)
- [Aon vs CNA Commercial Property Insurance](https://spot.insure/compare/aon-vs-cna/commercial-property)
- [Aon vs CNA Crime Insurance](https://spot.insure/compare/aon-vs-cna/crime)
- [Aon vs CNA Cyber Insurance](https://spot.insure/compare/aon-vs-cna/cyber)
- [Aon vs CNA D&O Insurance](https://spot.insure/compare/aon-vs-cna/directors-officers)
- [Aon vs CNA Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-cna/employment-practices)
- [Aon vs CNA Fiduciary Liability Insurance](https://spot.insure/compare/aon-vs-cna/fiduciary)
- [Aon vs CNA General Liability Insurance](https://spot.insure/compare/aon-vs-cna/general-liability)
- [Aon vs CNA Kidnap and Ransom Insurance](https://spot.insure/compare/aon-vs-cna/kidnap-ransom)
- [Aon vs CNA Management Liability Insurance](https://spot.insure/compare/aon-vs-cna/management-liability)
- [Aon vs CNA Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-cna/professional-errors-omissions)
- [Aon vs CNA Umbrella and Excess Liability Insurance](https://spot.insure/compare/aon-vs-cna/umbrella-excess)
- [Aon vs CNA Workers’ Compensation Insurance](https://spot.insure/compare/aon-vs-cna/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 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)
- [The Baldwin Group vs CNA Surety Bonds](https://spot.insure/compare/baldwin-vs-cna/surety-bonds)

## Sources for Aon vs CNA 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 CNA

4. [Insurance for Small Businesses](https://www.cna.com/solutions/small-business). CNA; Insurance for Small Businesses, lines 38-50 and 65-67 (CNA Central and agent route); lines 79-106 (product and stated appetite lists); page footer line 132 (CNA registered service mark).. Accessed 2026-09-28.
5. [CNA Connect Small Businessowners Policy (BOP) | CNA Insurance](https://www.cna.com/products/cna-connect). CNA; CNA Connect; coverages, product range, services. Accessed 2026-09-28.
6. [General Disclaimer](https://www.cna.com/cnadisclaimer/generaldisclaimer). CNA; General Disclaimer paragraphs 1 and 5 (HTML lines 24 and 28): CNA describes Continental Casualty Company and its relevant affiliates; references to CNA may include one or more CCC affiliates; each particular policy/product/service is the responsibility only of the specific CNA company that issues or supplies it. Footer line 57 identifies CNA Financial Corporation as trademark registrant. Re-read 2026-09-29.. Accessed 2026-09-29.
7. [CNA Surety - Surety and Fidelity Bonds | CNA Insurance](https://www.cna.com/products/cna-surety). CNA; Surety/fidelity product sections, geography, agents/brokers, bONdLINE and claims services. Accessed 2026-09-28.

### 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).

## CNA Review Scores for 2026

Review Score: 9.0 / 10 from 1 rated source, equally weighted.

Customer feedback on CNA is mixed and hard to compare. NerdWallet gave it 4.5 out of 5 for manufacturers, while Trustpilot shows about 1.4 out of 5 from 49 mostly self-selected reviews.

- NerdWallet: NerdWallet editorial rating for manufacturers 4.5/5 (Editorial rating). NerdWallet editorial assessment of CNA for U.S. manufacturers, not consumer average. Period: Published 2026-03-26. Checked 2026-09-29. [Best Insurance for Manufacturers in 2026](https://www.nerdwallet.com/business/insurance/learn/manufacturers)
- Trustpilot: Displayed Trustpilot TrustScore 1.4/5 page text; 1.5/5 badge (TrustScore out of 5); 49 reviews. CNA.com profile, mixed business and consumer/LTC reports; self-selected, not representative commercial P&C sample. Period: 14 reviews in prior 12 months; 2026-09-29. Checked 2026-09-29. [CNA customer reviews](https://www.trustpilot.com/review/www.cna.com)
- BBB: BBB customer-review average 1/5 (BBB star rating); 6 reviews. Long Term Care Insurance profile covering headquarters/corporate locations; not commercial P&C; six self-selected reviews. Period: Displayed 2026-09-29. Checked 2026-09-29. [CNA Financial Corporation customer reviews](https://www.bbb.org/us/il/chicago/profile/long-term-care-insurance/cna-financial-corporation-0683-90032439/customer-reviews)

Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/cna/reviews).

## Agent and Developer Resources

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