---
title: "At-Bay vs Chubb: Cyber Insurance"
description: "Chubb writes Cyber Enterprise Risk Management itself and sells endorsements for systemic events, ransomware and neglected software exploits. At-Bay lists social engineering for all classes, includes Stance monitoring, and publishes appetite up to $5 billion in revenue and $10 million in limits."
canonical: "https://spot.insure/compare/at-bay-vs-chubb/cyber"
page-type: "line-comparison"
updated-at: "2026-09-25"
comparison-pair: "at-bay-vs-chubb"
provider-a: "at-bay"
provider-b: "chubb"
coverage-line: "cyber"
---

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

## Agent Guide

**What this page is:** Focused comparison of At-Bay and Chubb 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 Chubb. For all lines together use the pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- At-Bay vs Chubb for Cyber Insurance: how do they differ?
- Which is better for Cyber Insurance, At-Bay or Chubb?
- What does At-Bay or Chubb publish about Cyber Insurance (limits, eligibility, claims, add-ons)?

**Key facts:**
- Line: Cyber Insurance. Providers: At-Bay and Chubb.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}/{line}` with a before b). A reversed pair redirects permanently to the alphabetical one.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- 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; last updated 2026-09-25.

**Related pages:**
- [At-Bay vs Chubb](https://spot.insure/compare/at-bay-vs-chubb) — all coverage lines for this pair
- [Cyber Insurance guide](https://spot.insure/coverage/cyber) — how this coverage works
- [At-Bay profile](https://spot.insure/insurance-providers/at-bay) — provider profile
- [Chubb profile](https://spot.insure/insurance-providers/chubb) — provider profile

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

Chubb sells Cyber ERM through agents and brokers for any size, adding ransomware and widespread-event endorsements; At-Bay sells primary or excess cyber with optional security tiers and an in-house claims team.

Chubb underwrites Cyber ERM with named endorsements for systemic events and ransomware; At-Bay sells a feature-based product with Stance included and published limit ceilings up to $10 million.

## At-Bay vs Chubb Cyber Insurance Summary

Chubb writes Cyber Enterprise Risk Management itself and sells endorsements for systemic events, ransomware and neglected software exploits. At-Bay lists social engineering for all classes, includes Stance monitoring, and publishes appetite up to $5 billion in revenue and $10 million in limits. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") [1](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")

## What Are the Key Differences Between At-Bay and Chubb Cyber Insurance?

### Named Event Endorsements Versus Feature-Based Base Covers

Chubb lists a Widespread Event Endorsement with separate limits for systemic cyber events, a Ransomware Encounter Endorsement that tailors ransomware limits and retentions, and a Neglected Software Exploit Endorsement with a 45-day grace period. At-Bay instead lists direct and contingent business interruption, social engineering and invoice manipulation for all classes, full limits for cryptojacking and bricking, and cyber extortion including cryptocurrency payment, without those named event endorsements. Choose Chubb if you want to buy those specific endorsements on Chubb-underwritten paper; choose At-Bay if you want those listed crime and interruption features with Stance included. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") [1](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")

### Marketplace Quoting Versus Broker Platform Bands

Agents can quote Chubb cyber through Cyber Central or Chubb Marketplace for risks under $100 million in revenue, with a customizable large-account solution for organizations over $1 billion, plus a 24/7 hotline and Cyber Alert app. At-Bay's Broker Platform automates quotes only up to $100 million in revenue and $3 million in limits; larger accounts email underwriting, and the published ceiling is $5 billion and $10 million. Chubb does not publish per-policy dollar limits on the reviewed pages. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") [1](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")

## What Should You Confirm in At-Bay and Chubb Cyber Insurance Quotes?

- Ask Chubb which endorsements and quoting route apply to your revenue. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products")
- Ask At-Bay whether you fit the automated band or need an emailed submission, and which Stance tier applies. [1](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")
- Compare ransomware retentions on Chubb's endorsement against At-Bay's InsurSec ransomware waiting-period options. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") [1](https://www.at-bay.com/insurance/cyber/ "Cyber Insurance Coverage & Policy Highlights")

## At-Bay vs Chubb Cyber Insurance Compared

| Criteria | At-Bay Cyber Insurance | Chubb Cyber Insurance (Cyber Enterprise Risk Management) |
| --- | --- | --- |
| 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. [1](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..) | Agents and brokers can quote cyber alone through Cyber Central or bundled with other lines through Chubb Marketplace; multinational programs can be serviced locally in more than 35 countries. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") (Evidence: Company-reported; scope: Cyber Insurance Coverage & Products page quoting section..) |
| 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. [1](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. [1](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..) | Chubb lists first-party cyber incident response fund, business interruption (with contingent business interruption for outsourced technology providers), digital data recovery, and network extortion; third-party cyber/privacy/network security liability, payment card loss, regulatory proceedings and media liability; and cyber crime coverages (computer fraud, funds transfer fraud, social engineering fraud) available by endorsement. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") (Evidence: Company-reported; scope: Cyber insurance coverage list on the products page; subject to exclusions and the policy as issued..)<br><br>Chubb offers a Widespread Event Endorsement with separate limits and retentions for systemic cyber events, a Ransomware Encounter Endorsement that lets buyers tailor limits and retentions for ransomware losses, and a Neglected Software Exploit Endorsement that gives a 45-day grace period to patch published vulnerabilities before risk-sharing shifts toward the policyholder. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") (Evidence: Company-reported; scope: Innovative coverage concepts section; endorsement availability depends on underwriting..) |
| 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. [2](https://www.at-bay.com/licenses/ "Licenses") [3](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..) | Chubb underwrites Cyber Enterprise Risk Management (Cyber ERM) directly. It covers cyber, privacy and media exposures for organizations of any size that handle sensitive data or run a network or website. [5](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html "Cyber Insurance Coverage & Products") (Evidence: Company-reported; scope: Cyber Insurance Coverage & Products page, Cyber Enterprise Risk Management section..) |
| 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. [1](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..) | Chubb says cyber policyholders get access to a panel of pre-approved incident response providers, a 24/7 hotline and Cyber Alert app, a Cyber Threat Intelligence Team, a Vulnerability Management Outreach program, and the Chubb Cyber Index for trend and cost data. [6](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance.html "Cyber Insurance for Businesses") (Evidence: Company-reported; scope: Cyber Insurance for Businesses page, Cyber Services and Beyond Risk Transfer sections..) |
| 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. [4](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..) | Chubb reports 24/7 incident response availability by hotline or its Cyber Alert app, and publishes an annual Cyber Claims Landscape report analyzing claim frequency, severity and ransomware trends. [6](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance.html "Cyber Insurance for Businesses") (Evidence: Company-reported; scope: Cyber Insurance for Businesses page; claims scenarios and report are company-reported..) |

## About At-Bay and Chubb and Cyber Insurance

- [At-Bay company profile](https://spot.insure/insurance-providers/at-bay) · [At-Bay customer reviews](https://spot.insure/insurance-providers/at-bay/reviews)
- [Chubb company profile](https://spot.insure/insurance-providers/chubb) · [Chubb customer reviews](https://spot.insure/insurance-providers/chubb/reviews)
- [What Is Cyber Insurance?](https://spot.insure/coverage/cyber)

## Related Pages for At-Bay vs Chubb Cyber Insurance

- [At-Bay vs Chubb](https://spot.insure/compare/at-bay-vs-chubb): 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 Cyber Insurance](https://spot.insure/insurance-providers/at-bay/cyber)
- [Chubb Cyber Insurance](https://spot.insure/insurance-providers/chubb/cyber)

## Sources for At-Bay vs Chubb Cyber Insurance

### Sources About At-Bay

1. [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.
2. [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.
3. [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.
4. [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.

### Sources About Chubb

5. [Cyber Insurance Coverage & Products](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance/cyber-insurance-products.html). Chubb; Cyber Enterprise Risk Management target clients and product features; Cyber insurance coverage first-party and third-party lists; Cyber crime by endorsement; quoting via Cyber Central and Marketplace. Accessed 2026-09-23.
6. [Cyber Insurance for Businesses](https://www.chubb.com/us-en/business-insurance/products/cyber-insurance.html). Chubb; Cyber Services section; Incident response section; 24/7 hotline and Cyber Alert app; "95% of Fortune 1000 companies are Chubb insured". Accessed 2026-09-23.

Updated 2026-09-25. 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.

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/at-bay-vs-chubb/cyber.md)
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- [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)