---
title: "Gallagher vs Marsh Tech E&O Insurance"
description: "Gallagher places combined Tech E&O and cyber for a large technology book; Marsh treats tech E&O as a specialty and a data-center program building block."
canonical: "https://spot.insure/compare/gallagher-vs-marsh/technology-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-23"
---

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# Gallagher vs Marsh Tech E&O Insurance

Gallagher places combined Tech E&O and cyber for a large technology book; Marsh treats tech E&O as a specialty and a data-center program building block.

## Research Scope and Use

Use this comparison to evaluate Gallagher 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

Gallagher’s Technology practice places a combined E&O and cyber policy with outside carriers for more than 7,500 tech and telecom clients. Marsh treats technology E&O as a professional-liability specialty and says off-the-shelf tech E&O can leave gaps for data centers, so it designs programs that combine the line with property and casualty. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [10](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

## What Is Gallagher?

Gallagher is a business-insurance broker and risk-management consultancy. Its technology practice serves startups through global enterprises, alongside a separate small-business offering for IT professionals and an executive-risk practice covering D&O and transaction-related coverages. Woodruff Sawyer is now part of Gallagher. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [2](https://www.gallaghersmallbusiness.com/technology-services/ "Insurance for Technology & IT Businesses") [3](https://www.ajg.com/insurance/executive-and-financial-risk-insurance/ "Executive and Financial Risk Insurance") [4](https://www.gallaghersmallbusiness.com/legal-information/ "Legal Information") [5](https://www.ajg.com/merger-partners/woodruff-sawyer-is-now-gallagher/ "Woodruff Sawyer Is Now Gallagher")

[Gallagher profile](https://spot.insure/insurance-providers/gallagher)

## What Is Marsh?

Marsh is a global insurance broker and risk advisor. In the United States it places coverage through core Marsh teams and through Marsh McLennan Agency for many middle-market buyers, including technology, cyber, property, casualty and benefits programs. [6](https://www.marsh.com/en/home.html "Marsh | Leader in risk, strategy, people, and investments") [7](https://www.marsh.com/content/dam/marsh/Documents/PDF/US-en/us-client-compensation-guide.pdf "Compensation guide for US clients") [8](https://www.marsh.com/en/services/marsh-mclennan-agency.html "Marsh McLennan Agency (MMA)") [9](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 (E&O) insurance addresses claims that a technology product or service caused a customer or other third party a financial loss. It doesn't extend to cyber incidents, bodily injury or professional services outside the quoted product. [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://www.thehartford.com/professional-liability-insurance/errors-omissions-insurance/technology "Technology Errors and Omissions Insurance") [14](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")

## Key Differences in Tech E&O Insurance

### Combined Placement Versus Data-Center Program Design

Gallagher markets technology E&O as a single policy combining coverage for errors and omissions from professional services with cyber liability for breaches, ransomware and privacy violations, placed with outside carriers. Marsh treats tech E&O as a financial and professional liability specialty and separately as a building block inside data-center insurance programs. Marsh’s data-center page argues that conventional tech E&O was not built for modern data-center scale and concentration and can leave gaps. Gallagher’s technology page does not frame the line around data-center property and casualty towers. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [10](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

### Book, Industries and Unpublished Limits

Gallagher cites more than 7,500 technology and telecommunications clients from startups to global enterprises and over $1 billion in annual premium placed. Marsh names technology among specialized industries its professional-liability experts serve, alongside banking, insurance, asset management, media and healthcare. Neither reviewed set publishes Tech E&O limits or names the issuing insurer. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability")

### Client Tools

Gallagher offers Drive, Go, STEP, Submit and Verify to technology clients, not confirmed as included with every Tech E&O placement, and points to more than 250 dedicated Technology professionals. Marsh’s reviewed professional-liability and data-center pages do not describe an equivalent named digital suite for this line. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [10](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

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

- If you operate a data center, ask Marsh how tech E&O combines with property and casualty; ask Gallagher whether it is placing a standalone combined E&O/cyber policy. [10](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management") [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry")
- Get carrier names, forms, limits and retentions from both brokerages. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability")
- Ask Gallagher whether Drive and Verify are in the Tech E&O engagement. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry")
- Confirm whether Marsh’s placement is tech E&O only or a multi-line data-center program. [10](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 | Gallagher Technology Errors and Omissions (Tech E&O) Insurance | Marsh Technology Errors and Omissions Insurance |
| --- | --- | --- |
| Role in This Line | Gallagher's Technology insurance practice places technology E&O coverage with outside carriers for tech-sector clients; it does not underwrite the policy. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Company-reported; scope: Group-level technology industry practice page..) | 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. [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [10](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 | The technology industry practice page does not name the insurer that would issue a given client's technology E&O policy. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Not publicly disclosed; scope: Checked the group-level technology industry practice page..) | The reviewed pages do not name a specific technology E&O insurer. [11](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [10](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 | Gallagher says its Technology insurance practice serves technology and telecommunications clients ranging from startups to middle-market businesses to global enterprises, and reports more than 7,500 such clients and over $1 billion in annual premium placed. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Company-reported; scope: Group-level technology industry practice page; company-reported client and premium figures, not independently verified..) | Marsh names technology among the specialized industries its professional liability (E&O) experts serve, alongside banking, insurance and asset management, media and healthcare. [11](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 | Gallagher markets technology E&O as a single policy combining coverage for errors and omissions from rendering or failing to render professional services with cyber liability coverage for perils such as data breaches, ransomware attacks and privacy violations. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Company-reported; scope: Group-level technology industry practice page; a service description, not a specific policy's insuring agreement or exclusions..) | 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. [10](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..) |
| Limits and Retentions | The technology industry practice page does not publish limits, retentions or premium ranges for technology E&O. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Not publicly disclosed; scope: Checked the group-level technology industry practice page..) | Not described in the reviewed sources. |
| Risk Services | Gallagher offers technology clients a digital suite including Gallagher Drive for data-driven risk analytics, Gallagher Go as a client self-service portal, Gallagher STEP for online safety training, Gallagher Submit for insurance-submission tracking, and Gallagher Verify for certificate management. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Company-reported; scope: Group-level technology industry practice page; not confirmed as included with every tech E&O placement..)<br><br>Gallagher says its Technology insurance practice includes more than 250 dedicated professionals and points to named team leaders reachable at Rolling Meadows, Illinois phone numbers. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") (Evidence: Company-reported; scope: Group-level technology industry practice page..) | Not described in the reviewed sources. |

## Full Comparison

- [Gallagher vs Marsh](https://spot.insure/compare/gallagher-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 E&O insurance addresses claims that a problem with your technology product or service caused a customer financial loss.
- [Gallagher vs Marsh Commercial Property Insurance](https://spot.insure/compare/gallagher-vs-marsh/commercial-property)
- [Gallagher vs Marsh Crime Insurance](https://spot.insure/compare/gallagher-vs-marsh/crime)
- [Gallagher vs Marsh Cyber Insurance](https://spot.insure/compare/gallagher-vs-marsh/cyber)
- [Gallagher vs Marsh D&O Insurance](https://spot.insure/compare/gallagher-vs-marsh/directors-officers)
- [Gallagher vs Marsh Employee Health Benefits](https://spot.insure/compare/gallagher-vs-marsh/employee-health-benefits)
- [Gallagher vs Marsh Employment Practices Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh/employment-practices)
- [Gallagher vs Marsh Fidelity Bonds](https://spot.insure/compare/gallagher-vs-marsh/fidelity-bonds)
- [Gallagher vs Marsh Fiduciary Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh/fiduciary)
- [Gallagher vs Marsh Kidnap and Ransom Insurance](https://spot.insure/compare/gallagher-vs-marsh/kidnap-ransom)
- [Gallagher vs Marsh Professional Liability (E&O) Insurance](https://spot.insure/compare/gallagher-vs-marsh/professional-errors-omissions)
- [Gallagher vs Marsh Surety Bonds](https://spot.insure/compare/gallagher-vs-marsh/surety-bonds)
- [Gallagher vs Marsh Workers’ Compensation Insurance](https://spot.insure/compare/gallagher-vs-marsh/workers-compensation)
- [Alliance Risk vs Gallagher Tech E&O Insurance](https://spot.insure/compare/alliance-risk-vs-gallagher/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 Gallagher Tech E&O Insurance](https://spot.insure/compare/amelia-risk-vs-gallagher/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 Gallagher Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-gallagher/technology-errors-omissions)
- [At-Bay vs Marsh Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-marsh/technology-errors-omissions)

## Sources

### Gallagher

1. [Technology Insurance for the Tech Industry](https://www.ajg.com/industries/technology-insurance/). Gallagher; Solutions and coverages for the technology industry: Technology errors and omissions, including cyber liability; 250+ dedicated professionals, 7,500+ technology and telecommunications clients, $1B+ in annual premium; digital suite (Gallagher Drive, Go, STEP, Submit, Verify); Meet the Technology Insurance leaders. Accessed 2026-09-23.
2. [Insurance for Technology & IT Businesses](https://www.gallaghersmallbusiness.com/technology-services/). Gallagher Small Business; Protection for IT Professionals & Their Technology-Based Businesses; recommended coverage menu, including Surety Bond Programs; Connect With An Advisor. Accessed 2026-09-16.
3. [Executive and Financial Risk Insurance](https://www.ajg.com/insurance/executive-and-financial-risk-insurance/). Gallagher; Opening (insurance broking and placement); three key services; Directors and Officers; IPO and direct listings; Employment Practices; Fiduciary; Employee Dishonesty (Crime) and Fidelity Bond; Kidnap, Ransom and Extortion; M&A Transactional Insurance. Accessed 2026-09-16.
4. [Legal Information](https://www.gallaghersmallbusiness.com/legal-information/). Gallagher Small Business; Producer identification immediately above Quick Links. Accessed 2026-09-16.
5. [Woodruff Sawyer Is Now Gallagher](https://www.ajg.com/merger-partners/woodruff-sawyer-is-now-gallagher/). Gallagher; Opening; Executive and Financial Risk consulting; Continued access to client portals; contact form. Accessed 2026-09-16.

### Marsh

6. [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.
7. [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.
8. [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.
9. [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.
10. [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.
11. [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

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. [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.
14. [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.

Updated 2026-09-23. 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.

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