Insureon vs 
Marsh: How Do They Compare for Professional Liability (E&O) Insurance?
What is Insureon?
Insureon describes a small-business insurance agency and broker route with online quote entry and agent support. Its pages market several coverage types, but do not establish which insurer, policy form, state availability, or eligibility applies to a particular buyer. 1,2
Read the Insureon Professional Liability (E&O) Insurance page
What Is Marsh?
Marsh suits technology and larger businesses seeking specialist cyber placement or broad global risk advice; small firms wanting a quick standard quote should compare its MMA route or digital agencies. 4,5,6,7
What Is Professional Errors and Omissions (E&O) Insurance?
Professional liability can help pay defense costs and covered losses when a client says your advice or service caused financial harm. If customers rely on your work, list every service you provide and check the claims-made reporting and prior-work terms. 10,11,12,13
What Are the Key Differences Between Insureon and Marsh Professional Liability (E&O) Insurance?
Specialist Industry Bench
Marsh identifies specialist experience across financial services, venture capital, legal and accounting practices, engineering, media, technology, and healthcare. It says attorneys, economists, and actuaries work alongside coverage specialists to assess professional-liability exposure. Insureon describes E&O for service businesses, with carrier appetite determined during its online application. For a complex or regulated firm, Marsh’s named professional mix and industry list may help scope a broker discussion; a smaller service business can use Insureon’s online request, while confirming the carrier class. 8 3
Privacy and Computer-Security Scope
Marsh says many professional-liability policies also address privacy violations and computer-security breaches, in addition to errors, omissions, and negligence in professional services. Insureon’s overview focuses on alleged mistakes or unsatisfactory work and does not describe comparable cyber-related coverage. A firm with data exposure should ask whether any privacy or security coverage is included, limited, or placed under a separate cyber policy in each proposal. 8 3
Carrier and Limit Details
Neither reviewed page names a specific issuing insurer or publishes limits for an individual E&O placement. Marsh’s practice places the coverage; Insureon’s quote route also leaves insurer identity to the proposal. Compare policy forms, services scope, insurer, and limits rather than assuming their broad descriptions match. 8 3
What Should You Confirm in Insureon and Marsh Professional Liability (E&O) Insurance Quotes?
Insureon and Marsh Review Scores for 2026
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
Insureon Review Score
Review Score
4 rated sources
Insureon's ratings are split. Trustpilot shows 4.5 out of 5 from 2,401 reviews, while ConsumerAffairs shows 1.0 from 344.[1][2]
Read Insureon reviewsMarsh Review Score
Review Score
2 rated sources
Marsh’s global Trustpilot profile has a poor 1.3/5 score. Treat it as a service warning to investigate with your proposed team; it does not isolate US commercial accounts.[2][4][7]
Read Marsh reviewsInsureon vs Marsh Professional Liability (E&O) Insurance Compared
Insureon vs Marsh: Professional Liability (E&O) Insurance: documented features by provider
| Criteria | Insureon Professional Liability / E&O Insurance | Marsh Professional Liability Insurance Brokerage |
|---|---|---|
| Role in This Line | Insureon markets Professional Liability, also called Errors & Omissions, through its small-business quote channel. 3Company-reported. Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. | Marsh's financial and professional liability practice places professional liability (errors and omissions) insurance; MMA also places E&O coverage within its executive and professional liability practice for middle-market clients. 8,9Company-reported. Marsh professional liability page and MMA executive and professional liability page. |
| Issuing Insurer | Confirm in your quote. | The reviewed pages do not name a specific professional liability insurer. 8,9Not publicly disclosed. Marsh professional liability page and MMA executive and professional liability page as read on 2026-09-23. |
| Who It’s For | The page addresses service businesses exposed to client claims; the eligible professions and carrier appetite depend on the application and quote. 3Company-reported. Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. | Marsh names specialized industries its professional liability experts serve, including banking and broker/dealers, insurance companies and asset managers, merchant banking and venture capital, accountants, attorneys, architects and engineers, media and entertainment, technology, and healthcare and biotechnology. 8Company-reported. Marsh professional liability page, What We Offer section. |
| Coverage Features | The page describes client claims over alleged mistakes or unsatisfactory professional work; it does not establish policy-specific retroactive dates, exclusions or limits. 3Company-reported. Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. | Marsh says professional liability coverage can protect a company against liability and defense costs from a claim alleging an error, omission or negligence in performing professional services, and that many policies also cover privacy violations and computer security breaches. 8Company-reported. Marsh professional liability page opening description; illustrative policy description, not a specific policy form. |
| Limits and Retentions | The cited public overview does not establish the limits, deductibles, exclusions or form terms that would apply to a specific buyer. 3Not publicly disclosed. Ask for the quote and specimen or issued policy forms before treating a listed feature as covered. | Confirm in your quote. |
| Risk Services | Confirm in your quote. | Marsh says it employs attorneys, economists and actuaries alongside coverage specialists to assess a client's professional liability exposure from multiple angles, given the complexity of these risks. 8Company-reported. Marsh professional liability page. |
| How to Apply | The cited Insureon product page provides an online quote request path; that route does not identify the insurer or guarantee that a quote will be offered or bound. 3Company-reported. Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. | Confirm in your quote. |
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Sources for Insureon vs Marsh Professional Liability (E&O) Insurance
Sources About Insureon
- How Insureon Works. Insureon; Agent/broker and carrier roles (L82-88); application and advertised quote/payment route (L89-97); human support (L98-101). Accessed 2026-09-28.
- General Liability Insurance - Get Online Quotes. Insureon; Coverage/product overview; illustrative third-party claims; quote CTA. Accessed 2026-09-29.
- Professional Liability Insurance - Get Online Quotes. Insureon; Product definition L67-L89; quote CTA and target users on page. Accessed 2026-09-29.
Sources About Marsh
- Marsh | Leader in risk, strategy, people, and investments. Marsh; Hero and capability tiles; FAQ: What does Marsh do?; industries served; Is Marsh the same as Marsh McLennan? January 2026 brand change. Accessed 2026-09-16.
- Compensation guide for US clients. Marsh; US broking segments; broker role; retail commissions, client fees, wholesale, insurer consulting, contingent and supplemental commissions; Marsh LLC and Marsh USA LLC; page 3: broker role and Marsh & McLennan Agency segment; page 7: copyright © 2024 Marsh LLC. Accessed 2026-09-16.
- Marsh McLennan Agency (MMA). Marsh; Middle-market US organizations; wholly-owned subsidiary; business insurance, employee health and benefits, retirement, private client. Accessed 2026-09-16.
- Technology | Insurance Broking & Risk Management. Marsh; Opening Technology Practice description; practice links including data center insurance, fintech and Stratus; Talk to us. Accessed 2026-09-16.
- Professional liability. Marsh; Opening description; What We Offer: specialized industries served (banking, insurance/asset managers, merchant banking/venture capital, accountants/attorneys/architects/engineers, media/communications/entertainment, technology, healthcare/biotechnology). Accessed 2026-09-23.
- Expert Executive and Professional Liability Insurance. Marsh McLennan Agency; Our policies include D&O, E&O, EPL, commercial crime/fidelity, network security privacy risk/cyber, fiduciary, media liability, IP, architects and engineers, lawyers professional, and kidnap and ransom. Accessed 2026-09-23.
Sources for the Professional Liability (E&O) Insurance Guide
- FAQ: Professional liability insurance. Texas Department of Insurance; What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies. Accessed 2026-09-16.
- Professional liability insurance. Insurance Information Institute; Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion). Accessed 2026-09-16.
- Get business insurance. U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
- Professional Liability – US Direct Errors and Omissions Insurance. Hiscox Inc. specimen; About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act. Accessed 2026-09-16.
