Gallagher vs Marsh: Technology 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.

Kearny Risk organizes these comparisons for firms whose advice, content or technology creates professional exposures.Research updated 2026-09-25

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. [3] [6] [5]

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. [3] [6]

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. [5] [3]
  • Ask both for insurers, forms, limits and retentions. [3] [6]
  • Ask Gallagher which of its client tools come with your placement. [3]

Areas of coverage

Gallagher

  • role: Gallagher's Technology insurance practice places technology E&O coverage with outside carriers for tech-sector clients; it does not underwrite the policy. Group-level technology industry practice page.company-reportedSource ↗
  • coverage: 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. Group-level technology industry practice page; a service description, not a specific policy's insuring agreement or exclusions.company-reportedSource ↗
  • eligibility: 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. Group-level technology industry practice page; company-reported client and premium figures, not independently verified.company-reportedSource ↗
  • 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. Group-level technology industry practice page; not confirmed as included with every tech E&O placement.company-reportedSource ↗
  • services: 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. Group-level technology industry practice page.company-reportedSource ↗
  • insurer: The technology industry practice page does not name the insurer that would issue a given client's technology E&O policy. Checked the group-level technology industry practice page.not-disclosedSource ↗
  • limits: The technology industry practice page does not publish limits, retentions or premium ranges for technology E&O. Checked the group-level technology industry practice page.not-disclosedSource ↗

Marsh

  • role: 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. Marsh professional liability page and data-center insurance page.company-reportedSource ↗Source ↗
  • eligibility: Marsh names technology among the specialized industries its professional liability (E&O) experts serve, alongside banking, insurance and asset management, media and healthcare. Marsh professional liability page, What We Offer section.company-reportedSource ↗
  • coverage: 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. 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.company-reportedSource ↗
  • insurer: The reviewed pages do not name a specific technology E&O insurer. Marsh professional liability and data-center insurance pages as read on 2026-09-23.not-disclosedSource ↗Source ↗

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.

Sources reviewed

  1. 01
    Chubb DigiTech Enterprise Risk Management Policy — Technology E&O, Cyber and Privacy Short Form Application

    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

  2. 02
    DigiTech Enterprise Risk Management

    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

  3. 03
    Technology Insurance for the Tech Industry

    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

  4. 04
    Insurance and Bonding Guidelines

    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

  5. 05
    Data center insurance and risk management

    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

  6. 06
    Professional liability

    Marsh · What We Offer: specialized industries served, including Technology · accessed 2026-09-23

  7. 07
    Glossary of 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

  8. 08
    Appendix J – Contractor’s Insurance Requirements, Information Technology Umbrella Contract – Manufacturer Based (Statewide)

    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

  9. 09
    Technology Errors and Omissions Insurance

    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

  10. 10
    Cyber Risk for Technology Companies

    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

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