At-Bay vs Chubb: 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-reportedUS brand and disclosed producer; company statements, not regulatory verification.

Businesses buying Chubb coverage receive a policy from a US underwriting company, not from Chubb Limited, the Swiss holding company. Chubb is the marketing name for the group’s insurance subsidiaries and related services. ^52,15,38VerifiedGroup identity from the 2025 Form 10-K Item 1 and U.S. website legal disclosures. The holding company is not the risk-bearing insurer on a given U.S. policy.

Most commercial buyers need an independent agent or broker to reach Chubb; surplus-lines products require a licensed surplus-lines producer. Chubb appoints producers and operates agent portals, while Chubb Insurance Solutions Agency, Inc. administers Chubb Access appointments. ^42,43,15,51Company-reportedU.S. distribution as described on agent-access, contact and terms pages. This does not mean every independent agent is appointed for every product.

Large technology companies may fit At-Bay’s published Tech E&O appetite, but the quote route matters: its product page lists up to $5 billion revenue and $10 million limits, while its broker platform lists $100 million and $3 million. These are ceilings, not guaranteed offers. ²Company-reportedCurrent product-page appetite; no inference of pre-revenue, industry-specific or California eligibility.

A September 2023 Tech E&O appetite PDF still accessible on At-Bay’s site has lower revenue and limit ceilings than the current product page and lists restricted classes including autonomous AI. It should not be treated as current eligibility guidance; ask underwriting for the applicable appetite version. ^12,2Company-reportedLegacy document has inconsistent autoquote revenue figures internally. Current HTML controls description of advertised ceilings, but current class eligibility remains unresolved.

Startups through multinationals in software, technology services, communications and hardware can ask Chubb about technology insurance; its small-business BOP also lists technology among 500+ classes for firms with up to $30 million revenue. ^17,20,18Company-reportedCompany marketing of industry appetite and BOP eligibility. It does not establish that a particular Bay Area startup will be quoted or bound.

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-reportedHistorical 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 sourcesCurrent issuer not established; preserve source spelling without converting historical brand wording into a verified legal-entity record.

Check the declarations for your policy’s actual insurer because different Chubb companies issue different placements. Sources name Federal Insurance Company, ACE American, Westchester Fire or Westchester Surplus Lines, and for some business Illinois Union or other ACE paper. ^{43,38,41,49,54}Company-reportedU.S. commercial placements. Ratings cited on Westchester’s page are company-reported and were not independently verified.

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-reportedPublic broker workflow; no application submitted and no speed guarantee inferred.

Eligible small businesses can get agent-assisted quotes through Chubb Marketplace, with Cyber Central offering an express cyber route; the described online path is for appointed agents and brokers, not a general-public bind for middle-market technology programs. Cyber risks under $100 million revenue may qualify; referred risks go to underwriters. ^{22,23,43,44,25}Company-reportedU.S. agent platforms and buyer contact paths as of 16 September 2026. Quote speed and bindability are not guaranteed for any applicant.