---
title: "Gallagher vs Marsh: Tech E&O Insurance"
description: "Gallagher places one combined Tech E&O and cyber policy for tech and telecom companies from startup to global, with more than 7,500 clients and 250 dedicated staff; Marsh builds programs pairing Tech E&O with property and casualty for data centers, which it says off-the-shelf forms leave exposed."
canonical: "https://spot.insure/compare/gallagher-vs-marsh/technology-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-25"
comparison-pair: "gallagher-vs-marsh"
provider-a: "gallagher"
provider-b: "marsh"
coverage-line: "technology-errors-omissions"
---

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

## Agent Guide

**What this page is:** Focused comparison of Gallagher 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 Gallagher versus Marsh. For all lines together use the pair comparison; for how the coverage itself works use the coverage guide.

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

**Key facts:**
- Line: Tech E&O Insurance. Providers: Gallagher and Marsh.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}/{line}` with a before b). A reversed pair redirects permanently to the alphabetical one.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- 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; last updated 2026-09-25.

**Related pages:**
- [Gallagher vs Marsh](https://spot.insure/compare/gallagher-vs-marsh) — all coverage lines for this pair
- [Tech E&O Insurance guide](https://spot.insure/coverage/technology-errors-omissions) — how this coverage works
- [Gallagher profile](https://spot.insure/insurance-providers/gallagher) — provider profile
- [Marsh profile](https://spot.insure/insurance-providers/marsh) — provider profile

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

Gallagher's technology practice has 250-plus professionals placing tech E&O with cyber in one policy. Marsh treats tech E&O as a professional liability specialty and designs data center programs that add property and casualty lines.

Gallagher places one combined Tech E&O and cyber policy for more than 7,500 tech and telecom clients, while Marsh builds custom programs pairing Tech E&O with property and casualty for data centers that standard forms leave exposed.

## Gallagher vs Marsh Tech E&O Insurance Summary

Gallagher places one combined Tech E&O and cyber policy for tech and telecom companies from startup to global, with more than 7,500 clients and 250 dedicated staff; Marsh builds programs pairing Tech E&O with property and casualty for data centers, which it says off-the-shelf forms leave exposed. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [3](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [2](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

## What Are the Key Differences Between Gallagher and Marsh Tech E&O Insurance?

### Combined E&O and Cyber vs Data-Center Programs

Both are brokers. Gallagher places technology E&O as one policy combining professional-services errors with cyber liability for breaches, ransomware and privacy violations. Marsh treats Tech E&O as a professional-liability specialty and, for data centers, says off-the-shelf forms were not built for their scale and concentration, so it builds programs combining Tech E&O with property and casualty. Choose Gallagher if you are a software, tech or telecom company that wants E&O and cyber together; choose Marsh if you run a data center or need Tech E&O inside a multi-line program. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [3](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [2](https://www.marsh.com/en/industries/technology/expertise/data-center-insurance-and-risk-management-services.html "Data center insurance and risk management")

### Dedicated Tech Team and Tools at Gallagher

Gallagher cites more than 7,500 technology and telecom clients, over $1 billion in annual premium placed, more than 250 dedicated technology staff, and client tools called Drive, Go, STEP, Submit and Verify, though not all may come with every placement. Marsh lists technology among several industries its professional-liability team serves, alongside banking, insurance, asset management, media and healthcare, and describes no tech-specific tools. Neither publishes limits or names insurers. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [3](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability")

## What Should You Confirm in Gallagher and Marsh Tech E&O Insurance Quotes?

- If you run a data center, ask Marsh how Tech E&O fits with your property and casualty; ask Gallagher whether it would place a standalone combined policy. [2](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")
- Ask both for insurers, forms, limits and retentions. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry") [3](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability")
- Ask Gallagher which of its client tools come with your placement. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance for the Tech Industry")

## Gallagher vs Marsh Tech E&O Insurance Compared

| Criteria | Gallagher Technology Errors and Omissions (Tech E&O) Insurance | Marsh Technology Errors and Omissions Insurance |
| --- | --- | --- |
| 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. [3](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. [2](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..) |
| 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. [3](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [2](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..) |

## About Gallagher and Marsh and Tech E&O Insurance

- [Gallagher company profile](https://spot.insure/insurance-providers/gallagher) · [Gallagher customer reviews](https://spot.insure/insurance-providers/gallagher/reviews)
- [Marsh company profile](https://spot.insure/insurance-providers/marsh) · [Marsh customer reviews](https://spot.insure/insurance-providers/marsh/reviews)
- [What Is Technology Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/technology-errors-omissions)

## Related Pages for Gallagher vs Marsh Tech E&O Insurance

- [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 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.
- [Gallagher Tech E&O Insurance](https://spot.insure/insurance-providers/gallagher/technology-errors-omissions)
- [Marsh Tech E&O Insurance](https://spot.insure/insurance-providers/marsh/technology-errors-omissions)

## Sources for Gallagher vs Marsh Tech E&O Insurance

### Sources About 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.

### Sources About Marsh

2. [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.
3. [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.

Updated 2026-09-25. 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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- [Markdown page](https://spot.insure/compare/gallagher-vs-marsh/technology-errors-omissions.md)
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