---
title: "At-Bay vs Zurich U.S.: Professional Liability (E&O) Insurance"
description: "At-Bay publishes primary MPL limits up to $5 million and broker-platform quoting; Zurich describes modular E&O with coverage for negligence and failure to deliver services."
canonical: "https://spot.insure/compare/at-bay-vs-zurich/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "at-bay-vs-zurich"
provider-a: "at-bay"
provider-b: "zurich"
coverage-line: "professional-errors-omissions"
---

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[Human-readable page](https://spot.insure/compare/at-bay-vs-zurich/professional-errors-omissions)

## Agent Guide

**What this page is:** Focused comparison of At-Bay and Zurich U.S. for Professional Liability (E&O) 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 Professional Liability (E&O) Insurance questions about At-Bay versus Zurich U.S.. 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 Zurich U.S. for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, At-Bay or Zurich U.S.?
- What does At-Bay or Zurich U.S. publish about Professional Liability (E&O) Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Professional Liability (E&O) Insurance from At-Bay or Zurich U.S.?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: At-Bay and Zurich U.S..
- 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 Zurich U.S.](https://spot.insure/compare/at-bay-vs-zurich) — parent: all coverage lines for this pair
- [Professional Liability (E&O) Insurance guide](https://spot.insure/coverage/professional-errors-omissions) — coverage explainer for this line
- [At-Bay profile](https://spot.insure/insurance-providers/at-bay) — provider profile (evidence)
- [Zurich U.S. profile](https://spot.insure/insurance-providers/zurich) — provider profile (evidence)
- [At-Bay vs Zurich U.S. Cyber Insurance](https://spot.insure/compare/at-bay-vs-zurich/cyber) — sibling comparison (other line, or other pair for this line)
- [At-Bay vs Zurich U.S. Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-zurich/technology-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [AIG vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-at-bay/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [AIG vs Zurich U.S. Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-zurich/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-at-bay/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Zurich U.S. Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-zurich/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-at-bay/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [At-Bay vs Beazley Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-beazley/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)

# At-Bay vs Zurich U.S.: How Do They Compare for Professional Liability (E&O) Insurance?

At-Bay publishes primary MPL limits up to $5 million and broker-platform quoting; Zurich describes modular E&O with coverage for negligence and failure to deliver services.

## Research Scope and Use

Use this comparison to evaluate At-Bay and Zurich U.S. for Professional Liability (E&O) 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 offers primary miscellaneous professional liability with limits up to $5 million and routes submissions through brokers. Zurich describes E&O for professional-service mistakes and failure to deliver promised services in a modular suite. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich 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)

## Zurich U.S. Business Insurance: Products, Access, and Claims

Zurich U.S. serves Middle Market businesses and large or national accounts with commercial property-casualty and specialty insurance. Buyers can explore product lines and work through an agent or broker; the insurer named on a quote or policy identifies which Zurich company underwrites that coverage. [7](https://www.zurichna.com/about "About Us | Zurich U.S. | Commercial Insurance") [8](https://www.zurichna.com/brokers "Agents and Brokers | Zurich U.S.")

[Zurich U.S. profile](https://spot.insure/insurance-providers/zurich)

## What Is Professional Errors and Omissions (E&O) Insurance?

Professional liability can help pay defense costs and covered losses when a client says your advice or service caused financial harm. If customers rely on your work, list every service you provide and check the claims-made reporting and prior-work terms. [10](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [11](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [12](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [13](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance")

## Key Differences in Professional Liability (E&O) Insurance

### Published Limit and Covered Professional Loss

At-Bay publishes primary MPL limits up to $5 million and lists defense for disciplinary proceedings, independent-contractor coverage, and other form features. Zurich describes E&O responding to professional-service negligence, mistakes, or failure to deliver promised services, including defense costs, court fees, settlements, and judgments, but its reviewed record gives no limit figure. Compare the proposed limit with the actual services and ask which features are included in the quoted form. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance")

### Broker Submission and Modular Placement

At-Bay directs licensed insurance professionals to submit MPL by email or use its Broker Platform to quote, adjust limits and retentions, and bind. Zurich describes Pro Plus as modular and says admitted E&O is available in most states. An agent can compare At-Bay’s specified broker workflow with Zurich’s available state and modules, then confirm whether the applicant’s profession qualifies for either form. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance")

## What to Confirm in Professional Liability (E&O) Insurance Quotes

- Ask At-Bay which state restrictions and eligibility rules apply to the $5 million ceiling and identify the current issuing insurer. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")
- Ask Zurich which Pro Plus modules and limit are available for your profession and state. [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance") [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance")

## Offering Details

| Criteria | At-Bay Miscellaneous Professional Liability (MPL) Insurance | Zurich Errors & Omissions / Professional Liability |
| --- | --- | --- |
| Role in This Line | At-Bay markets MPL as one of its own named insurance products, sold through its disclosed producer, At-Bay Insurance Services LLC, with the product page directed at "properly licensed insurance professionals" submitting business rather than at direct retail buyers. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [4](https://www.at-bay.com/licenses/ "Licenses") (Evidence: Company-reported; scope: Current MPL product page and license disclosures; this describes the distribution channel, not who bears the underwriting risk..) | Confirm in your quote. |
| Issuing Insurer | The current MPL product page does not name the insurer that issues the policy. A September 2023 press release named United Specialty Company in connection with MPL, but that historical reference does not establish the current issuing insurer for a new MPL quote. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [5](https://www.at-bay.com/press_releases/at-bay-doubles-mpl/ "At-Bay Doubles Miscellaneous Professional Liability Appetite") (Evidence: Not found in reviewed sources; scope: Reviewed MPL page as of 2026-09-23 and the September 2023 press release; restates the existing provider fact that MPL's current issuer is unresolved, distinct from the August 2023 Cyber/Tech E&O transition to At-Bay Specialty Insurance Company paper..) | Confirm in your quote. |
| Who It’s For | At-Bay says it provides primary MPL for businesses of all revenue sizes with limits up to $5 million, subject to state restrictions and eligibility requirements detailed in a separate MPL appetite guide. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") (Evidence: Company-reported; scope: Current MPL appetite paragraph; the linked appetite guide's specific eligibility requirements were not independently opened for this record..) | Zurich names technology, manufacturing and third-party service providers among targeted E&O classes. [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance") (Evidence: Company-reported; scope: Zurich U.S. brand; exact underwriting company may vary by policy and state; professional errors and omissions; United States. Company-reported product description; actual coverage, underwriting, limits and state availability are governed by issued policy terms..) |
| Coverage Features | At-Bay lists MPL coverage highlights including automatic coverage for acquired subsidiaries, claims-made-and-reported coverage, coverage for independent contractors, disciplinary-proceedings defense, a duty-to-defend contract, personal-injury coverage (including emotional distress), punitive damages where insurable, a professional-services definition written for each insured, and an 80/20 hammer clause. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") (Evidence: Company-reported; scope: Product-page coverage-highlights list; an 80/20 hammer clause is a settlement provision where the insurer pays 80% and the insured pays 20% of costs after the insured declines a recommended settlement. The issued policy and declarations control actual wording, limits and exclusions..) | Zurich says E&O can address professional-service negligence, mistakes or failure to deliver promised services, including defense costs, court fees, settlements and judgments. [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance") (Evidence: Company-reported; scope: Zurich U.S. brand; exact underwriting company may vary by policy and state; professional errors and omissions; United States. Company-reported product description; actual coverage, underwriting, limits and state availability are governed by issued policy terms..)<br><br>Zurich’s Pro Plus is a modular suite of coverages in one policy; admitted E&O coverage is available in most states. [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance") (Evidence: Company-reported; scope: Zurich U.S. brand; exact underwriting company may vary by policy and state; professional errors and omissions; United States. Company-reported product description; actual coverage, underwriting, limits and state availability are governed by issued policy terms..) |
| Limits and Retentions | At-Bay publishes an MPL limit ceiling of up to $5 million, with state restrictions that are not detailed on the product page itself. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") (Evidence: Company-reported; scope: Current appetite paragraph; this is an advertised ceiling, not a guaranteed available limit for any specific applicant..) | Confirm in your quote. |
| How to Apply | At-Bay directs MPL submissions to underwriting by email or through automatic quotes on its Broker Platform, which At-Bay describes as a workflow of creating a quote, customizing limits and retentions, and binding the policy. [3](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [6](https://www.at-bay.com/brokers/platform/ "Broker Platform") (Evidence: Company-reported; scope: Current submission instructions and the general broker-platform workflow description; MPL-specific automation details were not separately confirmed..) | Confirm in your quote. |
| Claims Support | Confirm in your quote. | Zurich describes E&O claims specialists and underwriters and says claims are reviewed under policy terms with legal counsel coordination. [9](https://www.zurichna.com/insurance/errors-and-omissions "Errors and Omissions Insurance – E&O | Zurich Insurance") (Evidence: Company-reported; scope: Zurich U.S. brand; exact underwriting company may vary by policy and state; professional errors and omissions; United States. Company-reported product description; actual coverage, underwriting, limits and state availability are governed by issued policy terms..) |

## Full Comparison

- [At-Bay vs Zurich U.S.](https://spot.insure/compare/at-bay-vs-zurich): all coverage lines, business roles, service and claims.
- [What Is Professional Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/professional-errors-omissions): Professional liability can help pay covered defense costs and losses when a client says your advice or service caused financial harm; check services and reporting terms.
- [At-Bay vs Zurich U.S. Cyber Insurance](https://spot.insure/compare/at-bay-vs-zurich/cyber)
- [At-Bay vs Zurich U.S. Tech E&O Insurance](https://spot.insure/compare/at-bay-vs-zurich/technology-errors-omissions)
- [AIG vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-at-bay/professional-errors-omissions)
- [AIG vs Zurich U.S. Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-zurich/professional-errors-omissions)
- [Alliance Risk vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-at-bay/professional-errors-omissions)
- [Alliance Risk vs Zurich U.S. Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-zurich/professional-errors-omissions)
- [Aon vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-at-bay/professional-errors-omissions)
- [At-Bay vs Beazley Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-beazley/professional-errors-omissions)

## 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. [MPL Insurance: Coverage Highlights & Appetite](https://www.at-bay.com/insurance/mpl/). At-Bay; MPL Coverage Highlights list; MPL Appetite paragraph; Send us your submissions; "material on this page is intended for use solely by properly licensed insurance professionals". Accessed 2026-09-23.
4. [Licenses](https://www.at-bay.com/licenses/). At-Bay; Producer introduction; agency and surplus-lines footer naming At-Bay Insurance Services LLC. Accessed 2026-09-16.
5. [At-Bay Doubles Miscellaneous Professional Liability Appetite](https://www.at-bay.com/press_releases/at-bay-doubles-mpl/). At-Bay; September 28, 2023 release: final paragraph before Media Contacts. Accessed 2026-09-16.
6. [Broker Platform](https://www.at-bay.com/brokers/platform/). At-Bay; How it works: Create a quote, Customize your quote, Bind your policy, Manage renewals; FAQs. Accessed 2026-09-16.

### Zurich U.S.

7. [About Us | Zurich U.S. | Commercial Insurance](https://www.zurichna.com/about). Zurich U.S.; About Zurich U.S.; customer and industry description; FAQ on U.S. product focus. Accessed 2026-09-28.
8. [Agents and Brokers | Zurich U.S.](https://www.zurichna.com/brokers). Zurich U.S.; Agent/broker route and locator. Accessed 2026-09-28.
9. [Errors and Omissions Insurance – E&O | Zurich Insurance](https://www.zurichna.com/insurance/errors-and-omissions). Zurich U.S.; Pro Plus coverage, targeted classes, policy structure, claims and underwriting. Accessed 2026-09-28.

### Professional Liability (E&O) Insurance Guide

10. [FAQ: Professional liability insurance](https://www.tdi.texas.gov/commercial/pl-faq.html). Texas Department of Insurance; What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies. Accessed 2026-09-16.
11. [Professional liability insurance](https://www.iii.org/article/professional-liability-insurance). Insurance Information Institute; Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion). Accessed 2026-09-16.
12. [Get business insurance](https://www.sba.gov/counseling/launch-your-business/#business-insurance). U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
13. [Professional Liability – US Direct Errors and Omissions Insurance](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf). Hiscox Inc. specimen; About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act. 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).

## Zurich U.S. Reviews

Review Score: not enough ratings.

The available Zurich review evidence is mixed and comes from distinct populations: a car-rental-business editorial rating, broad global and U.S. review-platform snapshots, and a BBB business-profile grade. These are not a representative measure of every Zurich commercial policy or claim.

- NerdWallet: editorial rating 4.5 (5). U.S. commercial rental-fleet insurance publisher review; editorial evaluation, not a consumer average or all-line Zurich result. Period: Page updated July 10, 2026. Checked 2026-09-29. [Best Insurance Companies for Car Rental Businesses](https://www.nerdwallet.com/business/insurance/learn/car-rental-business-insurance)
- Trustpilot: TrustScore 1.2 (5); 748 reviews. Global Zurich Insurance Group profile; mixed countries and products, not U.S. commercial-policyholder satisfaction. Period: Snapshot 2026-09-29. Checked 2026-09-29. [Zurich Insurance Reviews](https://www.trustpilot.com/review/www.zurich.com)
- ConsumerAffairs: customer rating 1.0 (5); 72 reviews. U.S. Zurich North America/Property & Casualty profile; mixed products and customer populations, not line-specific commercial results. Period: Snapshot 2026-09-29. Checked 2026-09-29. [Zurich Property & Casualty Insurance Reviews from Real Customers](https://www.consumeraffairs.com/insurance/zurich-north-america-insurance.html)
- BBB: customer review rating 1.14 (5); 116 reviews. Customer-submitted reviews on the Zurich American Insurance Company profile; not a line-specific or representative policyholder survey. Period: Snapshot 2026-09-29. Checked 2026-09-29. [Zurich American Insurance Company Customer Reviews](https://www.bbb.org/us/tx/dallas/profile/insurance-companies/zurich-american-insurance-company-0875-90008903/customer-reviews)

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

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/at-bay-vs-zurich/professional-errors-omissions.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)