At-Bay vs Markel Insurance: How Do They Compare for Cyber Insurance?

At-Bay says it writes primary and excess cyber up to $10 million and pairs policies with Stance security services; optional InsurSec tiers add fraud and ransomware terms. Markel lists Cyber 360 coverage categories but publishes no universal limit or retention. 3,9

What Is At-Bay Insurance?

At-Bay targets technology firms with up to $5 billion in revenue and offers cyber limits up to $10 million, plus technology E&O; buyers seeking a standard online business package should compare other carriers. Managed detection and response costs extra. 1,2

Read the At-Bay profile

Read the At-Bay Cyber Insurance page

Markel Insurance: Specialty Business and Products

Markel Insurance is Markel Group's specialty and small-business insurance business, with offerings across packages, workers' compensation, cyber, professional and management liability, property, marine, and surety. Products use different insurers and distribution routes, so compare the issuer and terms shown on the specific quote. 7,8

Read the Markel Insurance profile

Read the Markel Insurance Cyber Insurance page

What Is Cyber Insurance?

Cyber insurance can help pay covered response costs and claims against your business after a cyber incident. If your business relies on data, software or outside providers, compare response limits, vendor outages and approval rules. 10,11

Read the full coverage guide

Key Differences in Cyber Insurance

Published Limits and Purchase Channel

At-Bay says it writes primary and excess cyber for businesses with revenue up to $5 billion and limits up to $10 million; broker-platform automated quotes are narrower, up to $100 million revenue and $3 million limits. Markel’s overview publishes no universal limit or retention. At-Bay’s figures provide a starting point for larger placements, but the broker’s automated threshold is lower; Markel buyers need a quote to learn available limits. 3 9

Security Services and Optional Tiers

At-Bay says every policy includes Stance vulnerability monitoring, vCISO advice, tabletop exercises, and training; optional InsurSec tiers can add reduced ransomware retention or a financial-fraud sublimit, with higher tiers requiring a separately purchased MDR subscription. Markel lists Cyber 360 coverage options, including business interruption, eCrime, privacy liability, and technology E&O, but its reviewed page does not detail comparable monitoring services. Ask which At-Bay tier and paid services are quoted and what risk support accompanies Markel’s form. 3 9

Incident Claims Support

At-Bay describes an in-house claims team, breach-coach phone line, and response roadmap for ransomware or system interruption. Markel’s reviewed product summary does not detail a cyber claims process. If response coordination is important, ask At-Bay who answers the breach line and Markel for its incident-notification and response process. 3 9

What to Confirm in Cyber Insurance Quotes

  • Ask At-Bay whether the quote is primary or excess, the actual limit, and which optional InsurSec tier and MDR subscriptions are included. 3
  • Ask Markel for proposed limits, retentions, and the specific Cyber 360 options included. 9
  • Get each provider’s breach-response contact and confirmation of financial-fraud and ransomware terms. 6 9

Review Scores

These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.

At-Bay

9.5/ 10

Review Score

2 rated sources

At-Bay’s public review evidence is thin: one old G2 review and a BBB complaint record. It is not enough to judge day-to-day service or claims handling.[3][6][9]

Read At-Bay reviews

Markel Insurance

7.5/ 10

Review Score

2 rated sources

There is little public customer feedback on Markel. Trustpilot shows 2.5 out of 5 from just 5 reviews, and BBB lists 12 complaints closed in the last three years.[4][3]

Read Markel Insurance reviews

Offering Details

At-Bay vs Markel Insurance: Cyber Insurance: documented features by provider

CriteriaAt-Bay Cyber InsuranceMarkel cyber (official overview)
Role in This Line

At-Bay places cyber insurance through its disclosed producer, At-Bay Insurance Services LLC, which is licensed as an insurance producer in all 50 states. At-Bay says eligible new excess-and-surplus (E&S) cyber business has been written on its own carrier paper, At-Bay Specialty Insurance Company, since August 2023. 4,5Company-reported. Producer role from the current license page; carrier role from a 2023 transition announcement, not confirmed for every current cyber quote.

Markel describes offering cyber for the audience stated on the cited product page. 9Company-reported. cyber marketed by markel; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Issuing Insurer

The current cyber product page does not name an issuing insurer. At-Bay's 2023 announcement says new E&S cyber business is quoted on At-Bay Specialty Insurance Company paper, but that is a historical statement, not a per-quote disclosure. 3,5Company-reported. Cyber product page checked today names no insurer; the carrier-transition release is dated August 2023 and does not cover every current state or account.

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Who It’s For

Confirm in your quote.

Businesses with strong security controls; listed sectors include financial and professional services, retail, manufacturing, technology, and healthcare. 9Company-reported. cyber marketed by markel; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Coverage Features

At-Bay lists direct and contingent business interruption and system failure coverage, social engineering and invoice manipulation coverage for all classes of business, full limits for cryptojacking and bricking, broad cyber extortion coverage including cryptocurrency payment, and reputational-harm coverage for PR costs from adverse publicity. 3Company-reported. Product-page coverage highlights; the issued policy and endorsements control actual terms.

At-Bay sells cyber insurance with optional InsurSec security tiers: Core includes vulnerability monitoring and a fraud-defense sub-limit; Advanced adds a reduced ransomware retention and a zero-hour ransomware waiting period; Complete adds a $0 financial-fraud retention and a $1 million financial-fraud sub-limit. Each higher tier requires a separately purchased managed detection and response (MDR) subscription. 3Company-reported. Product-page InsurSec package descriptions and footnotes; availability depends on the business's risk profile and qualifying conditions.

The cited product page describes Cyber 360 options including business interruption, dependent business interruption, eCrime, privacy/security liability, PCI DSS liability, media liability, and technology professional liability. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. 9Company-reported. cyber marketed by markel; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Limits and Retentions

At-Bay says it writes primary and excess cyber insurance for businesses with revenue up to $5 billion and limits up to $10 million. Through its Broker Platform, brokers can get automated quotes only for businesses up to $100 million in revenue and $3 million in limits. 3Company-reported. Published appetite ceilings, not guaranteed offers; underwriting and the appetite guide control individual accounts.

The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. 9Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred.

Risk Services

Every At-Bay cyber policy includes access to At-Bay Stance, a security platform with vulnerability monitoring, vCISO advisory and tabletop exercises, and security awareness training. Managed detection and response (MDR) for endpoints or email costs extra, $16 or $25 per user per month respectively, and is sold separately by At-Bay Security, LLC. 3Company-reported. Product-page InsurSec and footnote descriptions; MDR pricing is described as estimated and subject to change.

Confirm in your quote.

How to Apply

You apply for At-Bay cyber coverage by emailing a submission to underwriting@at-bay.com or by requesting an automated quote through At-Bay's Broker Platform. 3Company-reported. Product-page submission instructions; the Broker Platform route is limited to accounts within its lower appetite ceilings.

The page invites prospective customers or brokers to contact Markel or the named underwriting team. The page does not establish a quote, bind, or coverage-effective timeline. 9Company-reported. cyber marketed by markel; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Claims Support

At-Bay describes an in-house claims team and a named breach-coach phone line for active ransomware or system-interruption incidents, alongside a published cyber incident roadmap that assembles response partners after a claim is reported. 6Company-reported. Claims-handling page process description; does not establish claim outcomes or payment speed.

Confirm in your quote.

Full Comparison

More At-Bay vs Markel Insurance Comparisons

Other Cyber Insurance Comparisons

Sources

At-Bay

  1. Cyber, Tech E&O & Professional Liability Insurance. At-Bay; Product cards and agency disclosure. Accessed 2026-09-16.
  2. At-Bay Stance. At-Bay; Real Protection Against Real Threats; Endpoint, Email, MXDR; footnotes 1 and 3–6. Accessed 2026-09-16.
  3. Cyber Insurance Coverage & Policy Highlights. At-Bay; Cyber Coverage Highlights; Primary & Excess Appetite; InsurSec Packages (Core, Advanced, Complete); footnotes 1–7. Accessed 2026-09-23.
  4. Licenses. At-Bay; At-Bay Insurance Services LLC producer introduction and 50-state P&C/surplus-lines license table. Accessed 2026-09-23.
  5. At-Bay Begins Issuing Policies on its own E&S Paper. At-Bay; August 9, 2023 release: "At-Bay ... has begun issuing Cyber and Tech E&O policies under its Delaware-based Excess and Surplus (E&S) carrier, At-Bay Specialty Insurance Company"; "All E&S Cyber and Tech E&O new business in eligible states and territories is now being quoted on At-Bay Specialty Insurance Company paper, as of August 7, 2023". Accessed 2026-09-23.
  6. Claims Handling. At-Bay; At-Bay Cyber Incident Roadmap; Call an At-Bay Breach Coach; The At-Bay Claims Team. Accessed 2026-09-23.

Markel Insurance

  1. About us. Markel; Markel at a glance; description of Markel Insurance within Markel Group Inc. Accessed 2026-09-28.
  2. Markel Group Inc. 2025 Form 10-K. U.S. Securities and Exchange Commission; filed by Markel Group Inc.; Cover page; Part I, Item 1 Business—Markel Insurance, U.S. Wholesale and Specialty, Programs and Solutions; Part II, Item 7/8 for group and segment risks. Accessed 2026-09-28.
  3. Cyber Insurance Coverage. Markel; Markel Cyber 360; coverages available; business disruption; fraud; privacy/security liability; technology professional liability. Accessed 2026-09-30.

Cyber Insurance Guide

  1. Cyber Insurance. Federal Trade Commission; Opening; First-Party and Third-Party Coverage; First-Party Coverage; Third-Party Coverage; What Should Your Cyber Insurance Policy Cover. Accessed 2026-09-16.
  2. CyberEdge specimen policy. AIG; General Terms §§4–6, PDF pp.3–6; Security and Privacy §1 p.11, §2(l)/(p) p.14, §3 pp.15–18, exclusions p.18; Event Management §1 and §2(h), PDF pp.19–20. Accessed 2026-09-16.

Updated . 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. To suggest a correction, contact Spot with the page URL and supporting source.

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