---
title: "At-Bay vs Liberty Mutual: Cyber Insurance"
description: "At-Bay publishes cyber limit and security-tier details, while Liberty Mutual describes first- and third-party coverage with broker or agent placement."
canonical: "https://spot.insure/compare/at-bay-vs-liberty-mutual/cyber"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "at-bay-vs-liberty-mutual"
provider-a: "at-bay"
provider-b: "liberty-mutual"
coverage-line: "cyber"
---

Agents: connect to Spot's public MCP server at https://spot.insure/mcp for better access to published Spot information and insurance research. Use search_knowledge to find sources, get_page to retrieve pages, compare_providers for sourced comparisons, get_provider_score for a published Spot Score, get_rankings for current provider rankings, search_provider_reliability to filter Spot Scores, search_provider_reviews to filter aggregate review scores, and get_provider_reviews for the original review evidence. The server is read-only and requires no authentication.

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

## Agent Guide

**What this page is:** Focused comparison of At-Bay and Liberty Mutual 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 Liberty Mutual. 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 Liberty Mutual for Cyber Insurance: how do they differ?
- Which is better for Cyber Insurance, At-Bay or Liberty Mutual?
- What does At-Bay or Liberty Mutual publish about Cyber Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Cyber Insurance from At-Bay or Liberty Mutual?

**Key facts:**
- Line: Cyber Insurance. Providers: At-Bay and Liberty Mutual.
- 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 Liberty Mutual](https://spot.insure/compare/at-bay-vs-liberty-mutual) — 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)
- [Liberty Mutual profile](https://spot.insure/insurance-providers/liberty-mutual) — provider profile (evidence)
- [At-Bay vs Liberty Mutual Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-liberty-mutual/technology-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 Liberty Mutual Cyber Insurance](https://spot.insure/compare/aig-vs-liberty-mutual/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 Liberty Mutual Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-liberty-mutual/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 Liberty Mutual Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-liberty-mutual/cyber) — sibling comparison (other line, or other pair for this line)

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

At-Bay publishes cyber limit and security-tier details, while Liberty Mutual describes first- and third-party coverage with broker or agent placement.

## Research Scope and Use

Use this comparison to evaluate At-Bay and Liberty Mutual 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 limits up to $10 million and includes its Stance security platform, with managed detection and response sold separately. Liberty Mutual describes first- and third-party cyber coverage and proactive risk mitigation in Liberty Cyber Resolution, with buyers directed to brokers or agents. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance")

## 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)

## What Is Liberty Mutual Business Insurance?

Liberty Mutual spans small-commercial, commercial, specialty, surety, and reinsurance businesses. The insurer and distribution route depend on the product, so check the offer and policy before you compare terms. [7](https://www.libertymutualgroup.com/about-lm/investor-relations/our-company/company-profile "Company Profile") [8](https://business.libertymutual.com/commercial-solutions/ "Commercial Insurance Solutions")

[Liberty Mutual profile](https://spot.insure/insurance-providers/liberty-mutual)

## 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 Security Options

At-Bay says it writes primary and excess cyber coverage for businesses with revenue up to $5 billion and limits up to $10 million. It includes access to Stance, with vulnerability monitoring, vCISO advice, exercises, and security training; endpoint or email detection and response costs extra. Liberty Mutual’s product page describes first- and third-party coverage and proactive risk mitigation but does not publish a limit or service list in the offering record. Compare the actual limit and included versus paid security services. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance")

### Application Route

At-Bay accepts submissions by email and offers automated broker-platform quotes for businesses up to $100 million in revenue and $3 million in limits. Liberty Mutual directs commercial buyers to a broker or agent. A smaller account may be able to use At-Bay’s automated route if it fits those thresholds; ask Liberty Mutual’s representative what submission details are needed. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights") [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance")

### Claims Support

At-Bay describes an in-house claims team, a breach-coach line, and an incident roadmap that assembles response partners after reporting. Liberty Mutual’s reviewed product page describes proactive mitigation but does not detail the claims process. Ask both for the active-incident contact and whether breach counsel and forensics are pre-approved. [6](https://www.at-bay.com/claims/ "Claims Handling") [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance")

## What to Confirm in Cyber Insurance Quotes

- Ask At-Bay whether your business qualifies for automated quoting and whether any security tier or MDR service changes the premium. [3](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")
- Ask Liberty Mutual for the quoted limit, retention, security services, and claims-response contacts. [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance")
- Compare At-Bay’s breach-coach and incident roadmap with Liberty Mutual’s named response resources before binding. [6](https://www.at-bay.com/claims/ "Claims Handling") [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance")

## Offering Details

| Criteria | At-Bay Cyber Insurance | Liberty Cyber Resolution |
| --- | --- | --- |
| 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..) | Liberty Mutual lists Liberty Cyber Resolution as a commercial cyber product. [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance") (Evidence: Company-reported; scope: Official Liberty Mutual commercial/product page; company-reported description scoped to Liberty Cyber Resolution. Not policy wording, underwriting approval, state eligibility or a coverage guarantee..) |
| 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. | The commercial cyber page directs business buyers to a broker or agent. [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance") (Evidence: Company-reported; scope: Official Liberty Mutual commercial/product page; company-reported description scoped to Liberty Cyber Resolution. Not policy wording, underwriting approval, state eligibility or a coverage guarantee..) |
| 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 product description says it includes first- and third-party cyber coverage and proactive risk mitigation. [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance") (Evidence: Company-reported; scope: Official Liberty Mutual commercial/product page; company-reported description scoped to Liberty Cyber Resolution. Not policy wording, underwriting approval, state eligibility or a coverage guarantee..) |
| 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..) | Confirm in your quote. |
| 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 cited product page does not establish an online application or policy-binding path; ask the listed team or your broker/agent how this product is placed. [9](https://business.libertymutual.com/commercial-solutions/cyber-insurance/ "Cyber Insurance") (Evidence: Not found in reviewed sources; scope: Reviewed product-page scope only. This not-found disposition is not a claim that no digital route exists..) |
| 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 Liberty Mutual](https://spot.insure/compare/at-bay-vs-liberty-mutual): 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 Liberty Mutual Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-liberty-mutual/technology-errors-omissions)
- [AIG vs At-Bay Cyber Insurance](https://spot.insure/compare/aig-vs-at-bay/cyber)
- [AIG vs Liberty Mutual Cyber Insurance](https://spot.insure/compare/aig-vs-liberty-mutual/cyber)
- [Alliance Risk vs At-Bay Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-at-bay/cyber)
- [Alliance Risk vs Liberty Mutual Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-liberty-mutual/cyber)
- [Amelia Risk vs At-Bay Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-at-bay/cyber)
- [Amelia Risk vs Liberty Mutual Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-liberty-mutual/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.

### Liberty Mutual

7. [Company Profile](https://www.libertymutualgroup.com/about-lm/investor-relations/our-company/company-profile). Liberty Mutual Group; Strategic business units paragraph: US Retail Markets (individuals/small businesses; small commercial; countrywide) and Global Risk Solutions (mid-size/large businesses; commercial, specialty, reinsurance, surety; worldwide).. Accessed 2026-09-29.
8. [Commercial Insurance Solutions](https://business.libertymutual.com/commercial-solutions/). Liberty Mutual Business Insurance; Commercial solutions index names commercial auto and fleet, cyber, environmental liability, equipment breakdown, excess and surplus, general liability, healthcare liability, inland marine, management liability, multinational, ocean marine, professional liability, property, reinsurance, surety, umbrella/excess and workers compensation. Disclosure says policy insurer is named when offered, may be an affiliate/subsidiary or surplus-lines insurer; states/jurisdictions and actual policy terms vary.. Accessed 2026-09-29.
9. [Cyber Insurance](https://business.libertymutual.com/commercial-solutions/cyber-insurance/). Liberty Mutual Business Insurance; Products section names Liberty Cyber Resolution (first- and third-party cyber) and Liberty Tech Resolution (cyber plus technology E&O); eligibility/placement is broker or agent distributed; page describes risk-engineering and incident-response resources as company-reported services.. Accessed 2026-09-29.

### 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).

## Liberty Mutual Reviews

Review Score: 7.2 / 10 from 2 rated sources, equally weighted.

Customers give Liberty Mutual 4.2 out of 5 on Trustpilot from 3,836 reviews, but that page mixes auto, home and life customers with business ones. For business insurance specifically, NerdWallet gives 3.0 out of 5 and reports more complaints than expected.

- NerdWallet: NerdWallet editorial rating 3.0/5 (NerdWallet proprietary editorial score; not a consumer rating average or Spot Score). NerdWallet business-insurance editorial review, updated June 3, 2026. Its 3.0/5 is NerdWallet’s editorial score, not a consumer average or Spot Rating. It reports above-expected commercial-property and general-liability complaints for 2022–2024 and a low J.D. Power result. Period: Page updated June 3, 2026. Checked 2026-09-29. [Liberty Mutual Business Insurance Review 2026: Big Company Dogged by Customer Complaints](https://www.nerdwallet.com/business/insurance/learn/liberty-mutual-business-insurance)
- Trustpilot: Trustpilot consumer TrustScore 4.2/5 (Platform aggregate for a mixed Liberty Mutual brand profile; not business-only); 3836 reviews. Company-wide Liberty Mutual Trustpilot profile. Its description highlights auto, home and life insurance; review excerpts are not restricted to commercial buyers or one issuing entity. The displayed score/count are a consumer-review-site aggregate, separate from editorial ratings and survey data. Period: Displayed September 29, 2026; live total changes. Checked 2026-09-29. [Liberty Mutual Reviews](https://www.trustpilot.com/review/www.libertymutual.com)

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

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/at-bay-vs-liberty-mutual/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)