---
title: "At-Bay vs Heffernan Insurance Brokers: Professional Liability (E&O) Insurance"
description: "At-Bay publishes specific MPL provisions; Heffernan includes E&O in its small-business service and says it can custom-build packages for industries outside its named sectors."
canonical: "https://spot.insure/compare/at-bay-vs-heffernan/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-25"
comparison-pair: "at-bay-vs-heffernan"
provider-a: "at-bay"
provider-b: "heffernan"
coverage-line: "professional-errors-omissions"
---

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

## Agent Guide

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

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: At-Bay and Heffernan Insurance Brokers.
- 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 Heffernan Insurance Brokers](https://spot.insure/compare/at-bay-vs-heffernan) — 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
- [Heffernan Insurance Brokers profile](https://spot.insure/insurance-providers/heffernan) — provider profile

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

Heffernan Insurance Brokers' small-business division shops E&O with insurers for sole proprietors through fast-growing firms; At-Bay offers its own MPL, up to $5 million, via licensed insurance professionals.

Businesses in industries outside Heffernan’s named sectors can ask it about a custom package; buyers comparing published MPL provisions can review At-Bay’s standalone terms.

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

At-Bay publishes specific MPL provisions; Heffernan includes E&O in its small-business service and says it can custom-build packages for industries outside its named sectors. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

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

### How Much Policy Detail You Can Review

At-Bay lists MPL features including acquired-subsidiary coverage, independent-contractor coverage and disciplinary-proceedings defense. Heffernan’s small-business page names E&O as a coverage but gives no comparable line-specific terms:

Heffernan describes errors and omissions coverage as protecting against claims for problems with a company's product or service that result in a financial loss to a client. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; the page does not list specific exclusions, claims-made versus occurrence form, or endorsements..)

At-Bay gives you more detail to use in an initial comparison; ask Heffernan for the policy form, limits and exclusions behind its offering. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")

### Which Business Each Route Fits

At-Bay describes eligibility for businesses across revenue sizes, subject to state restrictions. Heffernan says its small-business team serves sole proprietors through growing companies across several industries and can custom-design packages for unlisted sectors. If you have an unusual industry, ask Heffernan about a tailored package; for listed policy provisions, start with At-Bay’s MPL page. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite") [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

### How You Start

At-Bay takes broker submissions by email or through its Broker Platform. Heffernan asks buyers to contact its small-business division to request a quote and build a package. Ask what documents each needs and whether the Heffernan package will use a standard or custom E&O form. [4](https://www.at-bay.com/brokers/platform/ "Broker Platform") [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

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

- Ask Heffernan for the policy wording, limits, exclusions and issuing insurer. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")
- Ask At-Bay which insurer will issue its MPL and which state restrictions apply. [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")
- Confirm whether Heffernan will custom-design your package or use a standard E&O form. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")
- Compare the actual limits and premium offered by both. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") [1](https://www.at-bay.com/insurance/mpl/ "MPL Insurance: Coverage Highlights & Appetite")

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

| Criteria | At-Bay Miscellaneous Professional Liability (MPL) Insurance | Heffernan Professional Errors and Omissions Brokerage |
| --- | --- | --- |
| 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..) | Heffernan's small-business division says it serves sole proprietors through fast-growing companies across industries including construction, food, health care, hospitality, nonprofits, real estate, technology, transportation, and vintners and growers, and will custom-design a package for industries not listed. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; not exclusively E&O-specific, but describes the buyer base for the page listing this coverage..) |
| 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..) | Heffernan directs small-business buyers to contact the firm's small-business division to request a quote and says it will research and build a custom package for industries not already listed. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23..) |
| 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..) | Heffernan describes errors and omissions coverage as protecting against claims for problems with a company's product or service that result in a financial loss to a client. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; the page does not list specific exclusions, claims-made versus occurrence form, or endorsements..) |
| 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..) | Heffernan lists errors and omissions among the coverages its small-business division places for clients, shopping the line with insurers rather than underwriting it. [5](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; no dedicated professional-E&O product page was found..) |

## About At-Bay and Heffernan Insurance Brokers

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

## Related Pages for At-Bay vs Heffernan Insurance Brokers

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

## Sources for At-Bay vs Heffernan Insurance Brokers

### 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 Heffernan Insurance Brokers

5. [Small Business Insurance](https://www.heffins.com/business-insurance/small-business/). Heffernan Insurance Brokers; The types of coverage we can provide include... Errors and omissions protects against claims for problems with your product or service that result in a financial loss; industries served list; Specialty Programs; contact for custom-designed packages. 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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