---
title: "CNA vs Marsh: Tech E&O Insurance"
description: "CNA describes technology E&O for contractual requirements; Marsh highlights tech E&O expertise and combined programs for data-center risks."
canonical: "https://spot.insure/compare/cna-vs-marsh/technology-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "cna-vs-marsh"
provider-a: "cna"
provider-b: "marsh"
coverage-line: "technology-errors-omissions"
---

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[Human-readable page](https://spot.insure/compare/cna-vs-marsh/technology-errors-omissions)

## Agent Guide

**What this page is:** Focused comparison of CNA and Marsh for Tech E&O 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 Tech E&O Insurance questions about CNA versus Marsh. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- CNA vs Marsh for Tech E&O Insurance: how do they differ?
- Which is better for Tech E&O Insurance, CNA or Marsh?
- What does CNA or Marsh publish about Tech E&O Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Tech E&O Insurance from CNA or Marsh?

**Key facts:**
- Line: Tech E&O Insurance. Providers: CNA and Marsh.
- 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:**
- [CNA vs Marsh](https://spot.insure/compare/cna-vs-marsh) — parent: all coverage lines for this pair
- [Tech E&O Insurance guide](https://spot.insure/coverage/technology-errors-omissions) — coverage explainer for this line
- [CNA profile](https://spot.insure/insurance-providers/cna) — provider profile (evidence)
- [Marsh profile](https://spot.insure/insurance-providers/marsh) — provider profile (evidence)
- [CNA vs Marsh Commercial Property Insurance](https://spot.insure/compare/cna-vs-marsh/commercial-property) — sibling comparison (other line, or other pair for this line)
- [CNA vs Marsh Surety Bonds](https://spot.insure/compare/cna-vs-marsh/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs CNA Tech E&O Insurance](https://spot.insure/compare/alliance-risk-vs-cna/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Marsh Tech E&O Insurance](https://spot.insure/compare/alliance-risk-vs-marsh/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Amelia Risk vs CNA Tech E&O Insurance](https://spot.insure/compare/amelia-risk-vs-cna/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Amelia Risk vs Marsh Tech E&O Insurance](https://spot.insure/compare/amelia-risk-vs-marsh/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [At-Bay vs CNA Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-cna/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [At-Bay vs Marsh Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-marsh/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)

# CNA vs Marsh: How Do They Compare for Tech E&O Insurance?

CNA describes technology E&O for contractual requirements; Marsh highlights tech E&O expertise and combined programs for data-center risks.

## Research Scope and Use

Use this comparison to evaluate CNA and Marsh for Tech E&O 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.

## Summary

CNA names technology E&O and privacy-risk services; Marsh treats tech E&O as a specialty and combines it with property and casualty in data-center programs. [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | CNA Insurance") [9](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

## 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. [1](https://www.cna.com/solutions/small-business "Insurance for Small Businesses") [2](https://www.cna.com/products/cna-connect "CNA Connect Small Businessowners Policy (BOP) | CNA Insurance") [3](https://www.cna.com/cnadisclaimer/generaldisclaimer "General Disclaimer")

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

## 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. [5](https://www.marsh.com/en/home.html "Marsh | Leader in risk, strategy, people, and investments") [6](https://www.marsh.com/content/dam/marsh/Documents/PDF/US-en/us-client-compensation-guide.pdf "Compensation guide for US clients") [7](https://www.marsh.com/en/services/marsh-mclennan-agency.html "Marsh McLennan Agency (MMA)") [8](https://www.marsh.com/en/industries/technology.html "Technology | Insurance Broking & Risk Management")

[Marsh profile](https://spot.insure/insurance-providers/marsh)

## What Is Technology Errors and Omissions (E&O) Insurance?

Technology errors and omissions coverage can help pay when a customer claims your software, hosting, installation or technology advice caused financial loss. If you provide tech products or services, check each activity; cyber incidents and unrelated professional work need separate review. [11](https://content.naic.org/glossary-insurance-terms "Glossary of Insurance Terms") [12](https://doas.ga.gov/sites/default/files/2025-08/SPD-SP048%20Insurance%20and%20Bonding%20Guidelines%20August%202025.pdf "Insurance and Bonding Guidelines") [13](https://online.ogs.ny.gov/purchase/snt/awardnotes/7360022802AppendixJ_PRB01.pdf "Appendix J – Contractor’s Insurance Requirements, Information Technology Umbrella Contract – Manufacturer Based (Statewide)") [14](https://www.thehartford.com/professional-liability-insurance/errors-omissions-insurance/technology "Technology Errors and Omissions Insurance") [15](https://www.chubb.com/content/dam/chubb-sites/chubb-com/us-en/business-insurance/digitech-enterprise-risk-management-digitech-erm/documents/pdf/17010186-digitech-erm-12.17.pdf "DigiTech Enterprise Risk Management") [16](https://www.chubb.com/us/asset/smallbusiness/digitech-erm--new-business-application-small-business-pf-48204.pdf "Chubb DigiTech Enterprise Risk Management Policy — Technology E&O, Cyber and Privacy Short Form Application") [17](https://www.travelers.com/business-insurance/cyber-insurance/technology "Cyber Risk for Technology Companies")

## Key Differences in Tech E&O Insurance

### Data-center programs and contractual technology coverage

Marsh identifies technology E&O as a financial and professional liability specialty and says its data-center programs combine it with property, casualty and other lines because standard forms may leave concentration gaps. CNA describes Technology E&O for technology businesses and says it is intended to support contractual requirements. A data-center operator should compare Marsh’s integrated program design with CNA’s proposed line form, focusing on shared infrastructure exposures and the exact customer contracts. [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | CNA Insurance") [9](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

### Specialist placement and support

CNA describes dedicated claims and risk-control support across technology and professional-liability business. Marsh describes specialist attention to technology and data-center risks but the reviewed claims do not list a comparable claims service. That is a difference in published detail, not proof that either provider lacks a service. Ask Marsh who coordinates claims across the combined program, and ask CNA whether the technology form can be coordinated with property and casualty coverage for your facility. [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | CNA Insurance") [10](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability")

## What to Confirm in Tech E&O Insurance Quotes

- Can CNA coordinate Tech E&O with property and cyber for shared data-center incidents? [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | CNA Insurance")
- Which Marsh policy forms address data-center concentration, and who coordinates claims across the program? [9](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

## Offering Details

| Criteria | CNA Technology Errors & Omissions | Marsh Technology Errors and Omissions Insurance |
| --- | --- | --- |
| Role in This Line | Confirm in your quote. | Marsh treats technology errors and omissions (tech E&O) as one of its financial and professional liability specialties, with dedicated attention to the technology industry, and separately names it as a building block within its data-center insurance programs. [10](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [9](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management") (Evidence: Company-reported; scope: Marsh professional liability page and data-center insurance page..) |
| Issuing Insurer | Confirm in your quote. | The reviewed pages do not name a specific technology E&O insurer. [10](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [9](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management") (Evidence: Not publicly disclosed; scope: Marsh professional liability and data-center insurance pages as read on 2026-09-23..) |
| Who It’s For | CNA describes Technology E&O for technology businesses. [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | 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: US specialty commercial liability Claim limitation: Company-reported; policy wording, underwriting and jurisdiction-specific availability control..) | Marsh names technology among the specialized industries its professional liability (E&O) experts serve, alongside banking, insurance and asset management, media and healthcare. [10](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") (Evidence: Company-reported; scope: Marsh professional liability page, What We Offer section..) |
| Coverage Features | CNA says its technology E&O addresses contractual requirements and seeks to reduce coverage gaps. [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | 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: US specialty commercial liability Claim limitation: Company-reported; policy wording, underwriting and jurisdiction-specific availability control..) | Marsh says off-the-shelf technology E&O policies were not built for the scale and concentration of modern data centers and can leave gaps. It designs data center programs that combine technology E&O with property, casualty and other lines. [9](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management") (Evidence: Company-reported; scope: Data center insurance page, Closing the gaps in conventional coverage section; describes a gap in standard tech E&O for one customer segment (data centers), not the general product..) |
| Risk Services | CNA identifies responsive claims support and privacy/data-protection risk-control resources for technology clients. [4](https://www.cna.com/products/cyber "Cyber Insurance - Cyber Risk Solutions | 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: US specialty commercial liability Claim limitation: Company-reported; policy wording, underwriting and jurisdiction-specific availability control..) | Confirm in your quote. |

## Full Comparison

- [CNA vs Marsh](https://spot.insure/compare/cna-vs-marsh): all coverage lines, business roles, service and claims.
- [What Is Technology Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/technology-errors-omissions): Technology errors and omissions can help pay when a customer claims your software, hosting, installation or tech advice caused financial loss; cyber incidents need separate review.
- [CNA vs Marsh Commercial Property Insurance](https://spot.insure/compare/cna-vs-marsh/commercial-property)
- [CNA vs Marsh Surety Bonds](https://spot.insure/compare/cna-vs-marsh/surety-bonds)
- [Alliance Risk vs CNA Tech E&O Insurance](https://spot.insure/compare/alliance-risk-vs-cna/technology-errors-omissions)
- [Alliance Risk vs Marsh Tech E&O Insurance](https://spot.insure/compare/alliance-risk-vs-marsh/technology-errors-omissions)
- [Amelia Risk vs CNA Tech E&O Insurance](https://spot.insure/compare/amelia-risk-vs-cna/technology-errors-omissions)
- [Amelia Risk vs Marsh Tech E&O Insurance](https://spot.insure/compare/amelia-risk-vs-marsh/technology-errors-omissions)
- [At-Bay vs CNA Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-cna/technology-errors-omissions)
- [At-Bay vs Marsh Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-marsh/technology-errors-omissions)

## Sources

### CNA

1. [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.
2. [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.
3. [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.
4. [Cyber Insurance - Cyber Risk Solutions | CNA Insurance](https://www.cna.com/products/cyber). CNA; Cyber, Media, Technology & Professional Liability; product sections. Accessed 2026-09-28.

### Marsh

5. [Marsh | Leader in risk, strategy, people, and investments](https://www.marsh.com/en/home.html). 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.
6. [Compensation guide for US clients](https://www.marsh.com/content/dam/marsh/Documents/PDF/US-en/us-client-compensation-guide.pdf). 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.
7. [Marsh McLennan Agency (MMA)](https://www.marsh.com/en/services/marsh-mclennan-agency.html). Marsh; Middle-market US organizations; wholly-owned subsidiary; business insurance, employee health and benefits, retirement, private client. Accessed 2026-09-16.
8. [Technology | Insurance Broking & Risk Management](https://www.marsh.com/en/industries/technology.html). Marsh; Opening Technology Practice description; practice links including data center insurance, fintech and Stratus; Talk to us. Accessed 2026-09-16.
9. [Data center insurance and risk management](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html). Marsh; Closing the gaps in conventional coverage: off-the-shelf property, casualty, and technology errors and omissions policies were not built for the scale, density, and aggregation of modern data centers. Accessed 2026-09-23.
10. [Professional liability](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html). Marsh; What We Offer: specialized industries served, including Technology. Accessed 2026-09-23.

### Tech E&O Insurance Guide

11. [Glossary of Insurance Terms](https://content.naic.org/glossary-insurance-terms). National Association of Insurance Commissioners; Professional Errors and Omissions Liability; Errors and Omissions Liability | Professional Liability other than Medical. Accessed 2026-09-16.
12. [Insurance and Bonding Guidelines](https://doas.ga.gov/sites/default/files/2025-08/SPD-SP048%20Insurance%20and%20Bonding%20Guidelines%20August%202025.pdf). Georgia Department of Administrative Services; Professional Liability / Errors and Omissions p.6; Technology Errors & Omissions (Cyber Liability) §9 pp.7–8. Accessed 2026-09-16.
13. [Appendix J – Contractor’s Insurance Requirements, Information Technology Umbrella Contract – Manufacturer Based (Statewide)](https://online.ogs.ny.gov/purchase/snt/awardnotes/7360022802AppendixJ_PRB01.pdf). New York State Office of General Services; §4 Technology Errors and Omissions, printed p.6 / PDF p.6; claims-made tail note. Accessed 2026-09-16.
14. [Technology Errors and Omissions Insurance](https://www.thehartford.com/professional-liability-insurance/errors-omissions-insurance/technology). The Hartford; What Is Technology Errors and Omissions Insurance?; differences between cyber liability and errors and omissions; How Technology Errors and Omissions Insurance Works With Contracts. Accessed 2026-09-16.
15. [DigiTech Enterprise Risk Management](https://www.chubb.com/content/dam/chubb-sites/chubb-com/us-en/business-insurance/digitech-enterprise-risk-management-digitech-erm/documents/pdf/17010186-digitech-erm-12.17.pdf). Chubb; Coverage Synopsis > Third-Party Liability Coverage > Technology Errors and Omissions; Cyber, Privacy and Network Security Liability; footer product-summary disclaimer. Accessed 2026-09-16.
16. [Chubb DigiTech Enterprise Risk Management Policy — Technology E&O, Cyber and Privacy Short Form Application](https://www.chubb.com/us/asset/smallbusiness/digitech-erm--new-business-application-small-business-pf-48204.pdf). ACE American Insurance Company / Chubb; Claims-made notice p.1; §2 Nature of Operations product/service schedule pp.2–3; §7 Technology E&O pp.4–5; §9–10 current and desired coverage pp.5–6. Accessed 2026-09-16.
17. [Cyber Risk for Technology Companies](https://www.travelers.com/business-insurance/cyber-insurance/technology). Travelers; CyberRisk Tech coverage includes… technology errors and omissions; businesses can choose cyber protection, E&O protection or both; E&O coverage helps address… errors, omissions or negligent acts in the performance of its services. 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.

## CNA Reviews

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).

## Marsh Reviews

Review Score: 5.8 / 10 from 2 rated sources, equally weighted.

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.

- Trustpilot: TrustScore 1.3 (0–5 stars); 115 reviews. Global brand profile across products/countries, not U.S. commercial-only. Period: 35 reviews in prior 12 months. Checked 2026-09-25. [Marsh Reviews | Trustpilot](https://www.trustpilot.com/review/www.marsh.com)
- Buzdy (Google review aggregation): Google reviews shown by Buzdy 4.5 (0–5 stars); 4 reviews. Named Marsh (Hong Kong) Limited office in Quarry Bay, Hong Kong. Buzdy states ratings/counts are powered by Google. Foreign local office only; not the U.S. Marsh brokerage or a firmwide score. Period: Listing verification 2026-07-29; accessed 2026-09-25. Checked 2026-09-25. [Marsh (Hong Kong) Limited | Buzdy](https://buzdy.com/viewMerchant/marsh-hong-kong-limited-hong-kong)

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

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/cna-vs-marsh/technology-errors-omissions.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)