---
title: "At-Bay vs Markel Insurance: Cyber Insurance"
description: "At-Bay publishes cyber limits up to $10 million and tiered security options, while Markel describes Cyber 360 coverage options without universal limits."
canonical: "https://spot.insure/compare/at-bay-vs-markel/cyber"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "at-bay-vs-markel"
provider-a: "at-bay"
provider-b: "markel"
coverage-line: "cyber"
---

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[Human-readable page](https://spot.insure/compare/at-bay-vs-markel/cyber)

## Agent Guide

**What this page is:** Focused comparison of At-Bay and Markel Insurance for Cyber Insurance: what each provider publishes about this line, checked against the same criteria, with numbered sources.

**Use this page when:** Cite or fetch this for Cyber Insurance questions about At-Bay versus Markel Insurance. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- At-Bay vs Markel Insurance for Cyber Insurance: how do they differ?
- Which is better for Cyber Insurance, At-Bay or Markel Insurance?
- What does At-Bay or Markel Insurance publish about Cyber Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Cyber Insurance from At-Bay or Markel Insurance?

**Key facts:**
- Line: Cyber Insurance. Providers: At-Bay and Markel Insurance.
- Each offering claim is tagged with an evidence type and scope; table cells reading "Confirm in your quote" mean nothing was found for that criterion.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}` with a before b). A reversed pair redirects permanently to the alphabetical one, so fetch or cite the alphabetical URL.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- "Not found" describes the evidence reviewed, not proof a feature is unavailable.
- Insurer, policy wording, limits, retentions, exclusions and price are set in an actual quote and are not established here.

**Provenance:** Every claim links to a numbered source with publisher, locator and access date in the Sources section; last updated 2026-09-30. Editorial policy: /editorial-policy.

**Related pages:**
- [At-Bay vs Markel Insurance](https://spot.insure/compare/at-bay-vs-markel) — parent: all coverage lines for this pair
- [Cyber Insurance guide](https://spot.insure/coverage/cyber) — coverage explainer for this line
- [At-Bay profile](https://spot.insure/insurance-providers/at-bay) — provider profile (evidence)
- [Markel Insurance profile](https://spot.insure/insurance-providers/markel) — provider profile (evidence)
- [At-Bay vs Markel Insurance Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-markel/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [AIG vs At-Bay Cyber Insurance](https://spot.insure/compare/aig-vs-at-bay/cyber) — sibling comparison (other line, or other pair for this line)
- [AIG vs Markel Insurance Cyber Insurance](https://spot.insure/compare/aig-vs-markel/cyber) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs At-Bay Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-at-bay/cyber) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Markel Insurance Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-markel/cyber) — sibling comparison (other line, or other pair for this line)
- [Amelia Risk vs At-Bay Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-at-bay/cyber) — sibling comparison (other line, or other pair for this line)
- [Amelia Risk vs Markel Insurance Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-markel/cyber) — sibling comparison (other line, or other pair for this line)

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

At-Bay publishes cyber limits up to $10 million and tiered security options, while Markel describes Cyber 360 coverage options without universal limits.

## Research Scope and Use

Use this comparison to evaluate At-Bay and Markel Insurance for Cyber Insurance against the same documented criteria. It identifies differences and questions to confirm; it does not select a winner for a particular business. Offering claims are what each provider publishes about this line unless marked otherwise. “Not found” describes the evidence reviewed, not proof that a feature is unavailable. Confirm the insurer, policy wording, limits, retentions, exclusions and cost in an actual quote.

## Summary

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](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage")

## 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](https://www.at-bay.com/insurance/ "Cyber, Tech E&O & Professional Liability Insurance") [2](https://www.at-bay.com/stance/ "At-Bay Stance")

[At-Bay profile](https://spot.insure/insurance-providers/at-bay)

## 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](https://www.markel.com/about-us "About us") [8](https://www.sec.gov/Archives/edgar/data/1096343/000109634326000020/mkl-20251231.htm "Markel Group Inc. 2025 Form 10-K")

[Markel Insurance profile](https://spot.insure/insurance-providers/markel)

## 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](https://www.ftc.gov/business-guidance/small-businesses/cybersecurity/cyber-insurance "Cyber Insurance") [11](https://www.aig.com/content/dam/aig/america-canada/us/documents/business/cyber/cyberedge-wording-sample-specimen-form.pdf "CyberEdge specimen policy")

## 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](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage")

### 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](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage")

### 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](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage")

## 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](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")
- Ask Markel for proposed limits, retentions, and the specific Cyber 360 options included. [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage")
- Get each provider’s breach-response contact and confirmation of financial-fraud and ransomware terms. [6](https://www.at-bay.com/claims/ "Claims Handling") [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage")

## Offering Details

| Criteria | At-Bay Cyber Insurance | Markel 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](https://www.at-bay.com/licenses/ "Licenses") [5](https://www.at-bay.com/press_releases/at-bay-begins-issuing-policies-on-its-own-paper/ "At-Bay Begins Issuing Policies on its own E&S Paper") (Evidence: Company-reported; scope: 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. [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage") (Evidence: Company-reported; scope: 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](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [5](https://www.at-bay.com/press_releases/at-bay-begins-issuing-policies-on-its-own-paper/ "At-Bay Begins Issuing Policies on its own E&S Paper") (Evidence: Company-reported; scope: 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..) | Confirm in your quote. |
| 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. [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage") (Evidence: Company-reported; scope: 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. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") (Evidence: Company-reported; scope: Product-page coverage highlights; the issued policy and endorsements control actual terms..)<br><br>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. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") (Evidence: Company-reported; scope: 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. [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage") (Evidence: Company-reported; scope: 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. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") (Evidence: Company-reported; scope: 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. [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage") (Evidence: Not publicly disclosed; scope: 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. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") (Evidence: Company-reported; scope: 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. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") (Evidence: Company-reported; scope: 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. [9](https://www.markel.com/us/commercial/professional-and-management-liability/cyber "Cyber Insurance Coverage") (Evidence: Company-reported; scope: 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. [6](https://www.at-bay.com/claims/ "Claims Handling") (Evidence: Company-reported; scope: Claims-handling page process description; does not establish claim outcomes or payment speed..) | Confirm in your quote. |

## Full Comparison

- [At-Bay vs Markel Insurance](https://spot.insure/compare/at-bay-vs-markel): all coverage lines, business roles, service and claims.
- [What Is Cyber Insurance?](https://spot.insure/coverage/cyber): Cyber insurance can help pay covered breach response, data recovery, interruption and liability costs; vendor incidents and funds-transfer fraud need separate checks.
- [At-Bay vs Markel Insurance Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-markel/professional-errors-omissions)
- [AIG vs At-Bay Cyber Insurance](https://spot.insure/compare/aig-vs-at-bay/cyber)
- [AIG vs Markel Insurance Cyber Insurance](https://spot.insure/compare/aig-vs-markel/cyber)
- [Alliance Risk vs At-Bay Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-at-bay/cyber)
- [Alliance Risk vs Markel Insurance Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-markel/cyber)
- [Amelia Risk vs At-Bay Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-at-bay/cyber)
- [Amelia Risk vs Markel Insurance Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-markel/cyber)

## Sources

### At-Bay

1. [Cyber, Tech E&O & Professional Liability Insurance](https://www.at-bay.com/insurance/). At-Bay; Product cards and agency disclosure. Accessed 2026-09-16.
2. [At-Bay Stance](https://www.at-bay.com/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](https://www.at-bay.com/insurance/cyber/). At-Bay; Cyber Coverage Highlights; Primary & Excess Appetite; InsurSec Packages (Core, Advanced, Complete); footnotes 1–7. Accessed 2026-09-23.
4. [Licenses](https://www.at-bay.com/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](https://www.at-bay.com/press_releases/at-bay-begins-issuing-policies-on-its-own-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](https://www.at-bay.com/claims/). At-Bay; At-Bay Cyber Incident Roadmap; Call an At-Bay Breach Coach; The At-Bay Claims Team. Accessed 2026-09-23.

### Markel Insurance

7. [About us](https://www.markel.com/about-us). Markel; Markel at a glance; description of Markel Insurance within Markel Group Inc.. Accessed 2026-09-28.
8. [Markel Group Inc. 2025 Form 10-K](https://www.sec.gov/Archives/edgar/data/1096343/000109634326000020/mkl-20251231.htm). 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.
9. [Cyber Insurance Coverage](https://www.markel.com/us/commercial/professional-and-management-liability/cyber). Markel; Markel Cyber 360; coverages available; business disruption; fraud; privacy/security liability; technology professional liability.. Accessed 2026-09-30.

### Cyber Insurance Guide

10. [Cyber Insurance](https://www.ftc.gov/business-guidance/small-businesses/cybersecurity/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.
11. [CyberEdge specimen policy](https://www.aig.com/content/dam/aig/america-canada/us/documents/business/cyber/cyberedge-wording-sample-specimen-form.pdf). 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 2026-09-30. 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](https://spot.insure/editorial-policy). To suggest a correction, [contact Spot](https://spot.insure/contact) with the page URL and supporting source.

## At-Bay Reviews

Review Score: 9.5 / 10 from 2 rated sources, equally weighted.

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.

- BBB: BBB rating A (A+ to F). At-Bay identity; US commercial insurance review/satisfaction evidence sought on BBB. Period: accessed 2026-09-25. Checked 2026-09-25. [At-Bay | BBB Business Profile](https://www.bbb.org/us/ca/mountain-view/profile/insurance-companies/at-bay-1216-1000025767)
- G2: G2 star rating 4.5 (5 stars); 1 reviews. At-Bay company/product feedback; G2 seller profile identifies its offering as cybersecurity insurance and lists San Francisco headquarters. Not an insurance-policy claims or commercial-buyer satisfaction study. Period: review dated 2020-09-21. Checked 2026-09-25. [At-Bay seller profile and reviews](https://www.g2.com/es/sellers/at-bay)

Reviewed 2026-09-25. [Read the sourced review](https://spot.insure/insurance-providers/at-bay/reviews).

## Markel Insurance Reviews

Review Score: 7.5 / 10 from 2 rated sources, equally weighted.

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.

- J.D. Power: Commercial Lines Insurers agent satisfaction score 726 (out of 1,000). 2022 commercial-lines independent-agent satisfaction study and 2025 small-commercial customer study; these use different populations and measures Period: 2022. Checked 2026-09-29. [2025 U.S. Small Commercial Insurance Study](https://www.jdpower.com/business/press-releases/2025-us-small-commercial-insurance-study); [2022 U.S. Independent Agent Satisfaction Study](https://www.jdpower.com/sites/default/files/file/2022-10/2022134%20U.S.%20Independent%20Agent.pdf)
- Trustpilot: TrustScore 2.5 (out of 5); 5 reviews. Trustpilot brand-level page for markel.com. It mixes products and is not mapped to one legal insurer. Checked 2026-09-29. [Markel Reviews](https://www.trustpilot.com/review/markel.com)
- BBB: BBB business grade A+. BBB business profile for Markel Insurance Company headquarters/corporate-owned locations; review and complaint submissions may include other products and affiliates Checked 2026-09-29. [Markel Insurance Company Business Profile](https://www.bbb.org/us/va/glen-allen/profile/insurance-companies/markel-insurance-company-0603-4017547); [Markel Insurance Company Complaints](https://www.bbb.org/us/va/glen-allen/profile/insurance-companies/markel-insurance-company-0603-4017547/complaints)
- BBB: Complaints 12; 12 reviews. BBB profile for Markel Insurance Company; complaints may include other Markel products and affiliates and BBB says not all submissions are displayed. Period: last 3 years, as displayed 2026-09-29. Checked 2026-09-29. [Markel Insurance Company Complaints](https://www.bbb.org/us/va/glen-allen/profile/insurance-companies/markel-insurance-company-0603-4017547/complaints)

Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/markel/reviews).

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/at-bay-vs-markel/cyber.md)
- [Developer resources](https://spot.insure/developers)
- [Public MCP server](https://spot.insure/mcp)
- [MCP server manifest](https://spot.insure/server.json)
- [OpenAPI description](https://spot.insure/openapi.json)
- [Public page index](https://spot.insure/llms.txt)