At-Bay vs Marsh: How Do They Compare for Business Insurance?

At-Bay offers cyber, technology E&O and miscellaneous professional liability, with coverage described as underwritten by non-admitted insurers. At-Bay Insurance Services LLC is its disclosed property-and-casualty agency and surplus-lines broker. ^1,5Company-reported. US brand and disclosed producer; company statements, not regulatory verification.

Marsh’s US compensation guide states that, as an insurance broker, Marsh’s role is to facilitate placement of insurance coverage on behalf of clients. The transparency page describes determining appropriate insurers and negotiating with those insurers. Marsh is not identified in these sources as the insurer that issues or pays the policy. ^31,30,15Company-reported. US client-compensation and transparency disclosures. Affinity/Amazon administrator language is a separate program role and is not treated as the default retail relationship.

Current Marsh materials use more than one US legal name. The compensation guide (copyright 2024, Marsh LLC) refers to Marsh LLC and Marsh USA LLC entering client agreements. The transparency page instead names Marsh LLC and Marsh USA Inc. Marsh McLennan Agency is described as a wholly owned Marsh subsidiary. A 2006 California decision caption used MARSH USA, INC., dba MARSH RISK AND INSURANCE SERVICES, license 0437153. Confirm the exact contracting producer on the proposal and license documents; current California license status remains unverified. ^{31,30,32,33,14,44}Conflicting sources. Unresolved Inc. versus LLC naming. Affinity’s Marsh USA LLC license table is company-reported as of 8 March 2024 and is not a CDI live lookup. Brand unification in January 2026 is described as a brand change, not a change in business structure.

Technology companies can compare one Tech E&O product for professional and cyber exposures, including coding errors, failed implementations and customer contractual indemnity; service-credit damages remain subject to policy terms. ²Company-reported. Product highlights, not an issued policy or universal contract coverage.

At-Bay’s cyber policy may address business interruption, system failure, extortion, privacy liability and financial fraud such as social engineering or invoice manipulation; your quote and policy set the actual limits and conditions. ³Company-reported. Current cyber product offering; components are not separate catalogue products.

Businesses needing miscellaneous professional liability can ask At-Bay about primary coverage with limits up to $5 million and a tailored definition of professional services; state restrictions apply, and the product is claims-made-and-reported with a duty to defend. ⁴Company-reported. Current MPL page; eligibility and policy wording remain underwriting-specific.

If you need limits above primary Cyber or Tech E&O, At-Bay lists excess options for those lines; this does not establish a general commercial umbrella policy. ^3,2Company-reported. Shared umbrella-excess key used only for explicitly marketed excess products.

Marsh’s Cyber Insurance practice markets brokerage of cyber policies and related analytics products. Marsh McLennan Agency’s cyber page lists solution areas such as cybercrime, extortion and ransomware, media liability, network interruption and privacy regulatory defense costs. The Technology Practice’s data-center service describes programs that can include property damage, equipment breakdown, business interruption, cyber, general liability and surety for power and interconnection obligations. Stratus is marketed as an operational property exchange for digital infrastructure with potential access to up to $10 billion of property capacity on a single placement; at launch it is focused on property, with inland marine, cyber and casualty described as possible later lines. These are marketed capabilities, not a standard startup package or guaranteed limits. ^{21,37,17,18,16}Company-reported. Direct practice and product pages. Technology-page FAQs about software BOP, fidelity or commercial auto were not used as offering proof. Stratus capacity is company-stated potential access, not a bound limit for a named insured.

Marsh’s Directors and Officers page offers D&O program design for public, private and non-profit companies. Its Employment Practices page offers EPLI, including endorsements described for firms with more than 4,000 employees and for midsize firms with 250 to 4,000 employees. Its Professional Liability page offers E&O risk-transfer design, including for technology businesses. MMA’s executive and professional liability practice lists D&O, E&O, EPL, commercial crime/fidelity, cyber, fiduciary, media, intellectual property and kidnap-and-ransom among policies it places. Endorsement headcount bands and product labels do not establish that a particular Bay Area company qualifies or that wording is equivalent across insurers. ^{24,25,26,38,27}Company-reported. Direct Marsh F&PL expertise pages and MMA executive catalogue. Fiduciary, crime, media, IP and K&R are listed on MMA’s practice page; they were not each confirmed on a separate Marsh.com expertise URL.

MMA’s business-insurance hub links casualty, property, surety, cyber, executive and professional liability, international placements, captives and small-business programs. Its property page covers commercial property and builders’ risk. Its casualty page includes workers’ compensation. MMA and Marsh sites also market employee health and benefits consulting and placement. MMA’s compensation-guide landing page exists for 2026 but the PDF body was not fully extracted here. ^{36,39,40,41,42,31}Company-reported. MMA solution pages. Texas-office lists and business-insurance FAQ examples were not used as nationwide catalogue proof. Small-business marketing does not establish an online instant-issue product.

An online quote is not bound coverage; At-Bay’s broker process still requires application review, chosen limits and retentions, documents, effective date, contingencies and signatures before binding. ^6,4Company-reported. Public broker workflow; no application submitted and no speed guarantee inferred.

The public Marsh path to speak with a broker is an inquiry, not an online bind. Contact pages ask you to choose an inquiry type, including a sales or RFP route. The business-inquiry page says to complete a form and that a representative will respond within 48 hours; it points existing-policy certificate, billing and policy questions elsewhere. The inquiry page does not display premiums or bind coverage. The 48-hour response time is a company statement, not a binding or service guarantee. ^28,29,34Company-reported. Inspected public contact-select and business-form pages on 16 September 2026 without submitting information. MMA has a separate contact page. Inquiry is not a completed insurance application.

Marsh describes a broker-led placement: identifying insurers for the risk, negotiating coverage and price, and, in core US broking segments, disclosing quotes and premium indications received. It may share incumbent or competing insurer names, pricing objectives, expiring terms, or give an insurer a last look when it believes that is in the client’s interest or the client instructs it. Those market practices are disclosure statements, not a guaranteed outcome or turnaround. ^31,30Company-reported. Compensation guide transparency pledges and market-activity list. Not observed live placements.

Do not assume a past carrier announcement identifies today’s insurer: At-Bay’s 2023 announcement said eligible new E&S Cyber and Tech E&O would use At-Bay Specialty Insurance Company, but it does not settle a current California quote or MPL issuer. ¹¹Company-reported. Historical announcement effective August 7, 2023; no buyer-specific policy reviewed.

Ask who will issue your MPL policy: the current product page names no insurer, and a 2023 announcement naming United Specialty Company does not establish the present carrier or California availability. ^4,13Not found in reviewed sources. Current issuer not established; preserve source spelling without converting historical brand wording into a verified legal-entity record.

Marsh and MMA describe access to multiple insurers rather than a single issuing carrier for all business. MMA says it works with a wide variety of carriers. Stratus is a prior-submit exchange in which participating insurers evaluate each risk individually; the page does not name those insurers. Marsh’s compensation and transparency pages say Marsh or affiliates may receive insurer consulting compensation and may own equity interests in certain insurers or reinsurers, with a list on the transparency site. Victor, an affiliated MGU and wholesale broker, is described as accessing markets retail Marsh US cannot offer directly; that path is documented for some programs and is not assumed for every placement. Ask for the issuing insurer, surplus-lines status and proposed forms on the quote. ^{36,18,30,31,32}Not publicly disclosed. No verified carrier panel, ratings or admitted-status schedule. Amazon/Affinity producer language is program-specific.

California buyers should still confirm their product’s eligibility: At-Bay lists license 0L73812 for At-Bay Insurance Services LLC, but this company disclosure was not independently checked and does not establish a specific policy is available. ⁵Company-reported. California producer route; no regulator record retrieved.

Get written California eligibility for your exact business and product before planning around a quote; reviewed product pages do not establish a current California issuer, and MPL has state restrictions. ^5,2,3,4Not found in reviewed sources. Reviewed official HTML product pages and license table on September 16, 2026; current linked appetite PDFs could not be retrieved.

Marsh markets services in 130 countries. MMA is described as serving middle-market companies in the United States and Canada. Reviewed pages do not publish a product-by-state eligibility schedule, admitted versus surplus-lines map, or a California-only startup program. A California office mention, if any, would not by itself establish that a given policy can be issued to a California company. Confirm licensed producer, surplus-lines broker if used, and product availability for the insured’s locations. ^{14,35,33,19,16}Not publicly disclosed. No independently verified 50-state appointment list. Fintech page examples are UK-weighted and are not treated as a California product route.

Marsh Affinity’s licensing page lists Marsh USA LLC property-and-casualty licenses as of 8 March 2024, including California license 437153. A 2006 California Insurance Commissioner decision used license 0437153 for Marsh USA, Inc. dba Marsh Risk and Insurance Services. Present-day California authority remains unverified against a current regulator license record. A license number is not a determination that a specific coverage is available in California. ^32,44,45Not found in reviewed sources. Company-reported table plus historical CDI caption. CDI lookup not completed past public search landing. No invented active/inactive status.