---
title: "At-Bay vs Vouch: Professional Liability (E&O) Insurance"
description: "Vouch lists architecture, engineering and construction firms as E&O buyers; At-Bay offers general MPL for businesses of any revenue size up to $5 million."
canonical: "https://spot.insure/compare/at-bay-vs-vouch/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-25"
comparison-pair: "at-bay-vs-vouch"
provider-a: "at-bay"
provider-b: "vouch"
coverage-line: "professional-errors-omissions"
---

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

## Agent Guide

**What this page is:** Focused comparison of At-Bay and Vouch 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 Vouch. 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 Vouch for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, At-Bay or Vouch?
- What does At-Bay or Vouch publish about Professional Liability (E&O) Insurance (limits, eligibility, claims, add-ons)?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: At-Bay and Vouch.
- 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 Vouch](https://spot.insure/compare/at-bay-vs-vouch) — all coverage lines for this pair
- [Professional Liability (E&O) Insurance guide](https://spot.insure/coverage/professional-errors-omissions) — how this coverage works
- [At-Bay profile](https://spot.insure/insurance-providers/at-bay) — provider profile
- [Vouch profile](https://spot.insure/insurance-providers/vouch) — provider profile

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

Vouch is a broker for professional-services firms in accounting, architecture, IT and marketing, with an online Get Started flow. At-Bay is not a broker here: it markets its own miscellaneous professional liability, up to $5 million, aimed at licensed insurance professionals.

Architecture, engineering and construction businesses can compare Vouch’s grouped E&O category with At-Bay’s general MPL, which has a published $5 million ceiling.

## At-Bay vs Vouch Professional Liability (E&O) Insurance Summary

Vouch lists architecture, engineering and construction firms as E&O buyers; At-Bay offers general MPL for businesses of any revenue size up to $5 million. [7](https://www.corixinsurance.com/legal/disclosures "Legal Disclosures") [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")

## What Are the Key Differences Between At-Bay and Vouch Professional Liability (E&O) Insurance?

### Check How Your Industry Is Grouped

Vouch lists accounting and finance, architecture/engineering/construction, IT consulting, management consulting, and marketing and creative agencies among its E&O segments. At-Bay describes eligibility by revenue and limit rather than named industry groups. If your work spans design and construction, ask Vouch how each service is treated; ask At-Bay whether your operations meet its appetite. [5](https://www.vouch.us/professional-services "Insurance for Professional Services Firms") [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")

### Confirm Which Carrier Applies

Vouch’s Corix program names two potential insurers for its proprietary E&O products, but a specific quote may use a different partner. At-Bay’s MPL page does not name the issuing insurer. Ask for the actual carrier on your application before comparing terms. [7](https://www.corixinsurance.com/legal/disclosures "Legal Disclosures") [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")

### Start the Quote

Vouch routes buyers through its broker process and may use Corix’s application; At-Bay accepts submissions through its Broker Platform. Ask which route applies to your business and what documents are required. [6](https://www.corixinsurance.com/products/cyber-and-errors-omissions "Cyber and Errors & Omissions") [4](https://www.at-bay.com/brokers/platform/ "Broker Platform")

## What Should You Confirm in At-Bay and Vouch Professional Liability (E&O) Insurance Quotes?

- Ask Vouch whether Corix or another partner will place the policy and which insurer will issue it. [7](https://www.corixinsurance.com/legal/disclosures "Legal Disclosures")
- Ask At-Bay which carrier it proposes and whether your business meets its appetite. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")
- Request actual limits, retentions, exclusions and premiums from both. [5](https://www.vouch.us/professional-services "Insurance for Professional Services Firms") [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")
- If your work includes construction and design, confirm which services and contracts are covered. [5](https://www.vouch.us/professional-services "Insurance for Professional Services Firms")

## At-Bay vs Vouch Professional Liability (E&O) Insurance Compared

| Criteria | At-Bay Miscellaneous Professional Liability (MPL) Insurance | Vouch Errors & Omissions Insurance |
| --- | --- | --- |
| 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. [1](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..) | Vouch markets professional E&O to accounting and finance, architecture/engineering/construction, IT consulting, management consulting, and marketing and creative agency firms. [5](https://www.vouch.us/professional-services "Insurance for Professional Services Firms") (Evidence: Company-reported; scope: Vouch's Professional Services page; not an underwriting appetite guarantee for any specific applicant..) |
| 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. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [4](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..) | Corix's E&O product page offers a downloadable application and directs brokers to start an appointment process; Vouch's own site routes prospective buyers to its online "Get Started" application flow. [6](https://www.corixinsurance.com/products/cyber-and-errors-omissions "Cyber and Errors & Omissions") [5](https://www.vouch.us/professional-services "Insurance for Professional Services Firms") (Evidence: Company-reported; scope: Corix product page and Vouch site navigation..) |
| 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. [1](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..) | Corix describes E&O as protecting a business against claims of negligence, mistakes or inadequate work that cause a client financial loss in the provision of professional services, including legal defense costs and any damages awarded, even when the claim is ultimately groundless. [6](https://www.corixinsurance.com/products/cyber-and-errors-omissions "Cyber and Errors & Omissions") (Evidence: Company-reported; scope: Corix's cyber and E&O product page; actual insuring agreements and exclusions are set by the issued policy..) |
| 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. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [2](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..) | Vouch is a broker, not an insurer, for professional errors & omissions coverage. It lists Errors & Omissions among the core coverages it places for professional-services clients, and one of its named program partners, Corix, has a dedicated E&O product. [5](https://www.vouch.us/professional-services "Insurance for Professional Services Firms") [6](https://www.corixinsurance.com/products/cyber-and-errors-omissions "Cyber and Errors & Omissions") (Evidence: Company-reported; scope: Vouch's Professional Services page and Corix's cyber/E&O product page..) |

## About At-Bay and Vouch and Professional Liability (E&O) Insurance

- [At-Bay company profile](https://spot.insure/insurance-providers/at-bay) · [At-Bay customer reviews](https://spot.insure/insurance-providers/at-bay/reviews)
- [Vouch company profile](https://spot.insure/insurance-providers/vouch) · [Vouch customer reviews](https://spot.insure/insurance-providers/vouch/reviews)
- [What Is Professional Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/professional-errors-omissions)

## Related Pages for At-Bay vs Vouch Professional Liability (E&O)

- [At-Bay vs Vouch](https://spot.insure/compare/at-bay-vs-vouch): 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 Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/at-bay/professional-errors-omissions)
- [Vouch Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/vouch/professional-errors-omissions)

## Sources for At-Bay vs Vouch Professional Liability (E&O) Insurance

### Sources About At-Bay

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

### Sources About Vouch

5. [Insurance for Professional Services Firms](https://www.vouch.us/professional-services). Vouch; Expertise across professional services: Accounting & Finance, Architecture/Engineering/Construction, IT Consulting, Management Consulting, Marketing & Creative Agencies; Core coverages for Professional Services: Errors & Omissions, General Liability, Cyber Liability, Employment Practices Liability, Workers' Compensation. Accessed 2026-09-23.
6. [Cyber and Errors & Omissions](https://www.corixinsurance.com/products/cyber-and-errors-omissions). Corix Insurance; Errors & Omissions insurance provided by Corix helps protect businesses for claims of negligence, mistakes, or inadequate work that causes a financial loss to clients, in the provision of professional services. It includes legal defense costs and damages awarded, even when the claim is groundless.. Accessed 2026-09-23.
7. [Legal Disclosures](https://www.corixinsurance.com/legal/disclosures). Corix Insurance; Policies are issued by State National Insurance Company (NAIC# 12831) or United Specialty Insurance Company (NAIC#12537).. 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.

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