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 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,^3,²

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 ³ ²

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 ³

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 ¹
Ask both for insurers, forms, limits and retentions. ¹ ³
Ask Gallagher which of its client tools come with your placement. ¹

Gallagher vs Marsh Tech E&O Insurance Compared

Gallagher vs Marsh: Tech E&O Insurance: documented features by provider

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. ¹Company-reported. 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. ³Company-reported. 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. ¹Company-reported. 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. ²Company-reported. 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. ¹Company-reported. 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. ^3,²Company-reported. Marsh professional liability page and data-center insurance page.