At-Bay vs Coterie Insurance Professional Liability (E&O) Insurance

Coterie publishes five specific MPL limit tiers and a state-availability list; At-Bay advertises one $5 million ceiling.

What Is At-Bay Insurance?

At-Bay offers Cyber, Tech E&O, and miscellaneous professional liability insurance through its disclosed insurance agency and surplus lines broker. Its Stance security services have policy eligibility conditions, with managed detection and response sold separately. 1,2

Read the At-Bay profile

What Is Coterie Insurance?

Coterie Insurance is a managing general agency and digital small-business insurance platform built for licensed agents and distribution partners. It markets business owner's, standalone general liability and miscellaneous professional liability policies, with optional endorsements for eligible risks. 7,8,9

Read the Coterie Insurance profile

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

Professional errors and omissions (E&O) insurance, also called professional liability insurance, addresses claims that professional services or advice caused a client financial loss. What's covered depends on the services actually scheduled in the policy, not the product label alone. 11,12,13,14

Read the full coverage guide

Key Differences in Professional Liability (E&O) Insurance

Granularity of Published Limits

At-Bay publishes a single advertised ceiling for Miscellaneous Professional Liability, up to $5 million, without breaking the number into tiers or an extended-reporting structure. 3 Coterie's brochure instead itemizes the limit choice:

Coterie offers MPL each-claim limits of $25,000, $50,000, $250,000, $500,000, or $1,000,000, with the aggregate set at two times the each-claim limit (three times for the $1,000,000 option); the basic policy includes a 60-day extended reporting period, with optional purchased extensions of 1 to 6 years, and up to 6 years of prior-acts (retroactive) coverage. 10Company-reported. MPL brochure 'Available Limits' table and 'Extended Reporting Period'/'Retroactive Date' definitions.

Set side by side, a buyer choosing At-Bay gets one advertised ceiling to work from, while a buyer choosing Coterie picks from five named tiers with a stated tail period. 3 10

Eligible Professions Versus a General Appetite Statement

Coterie's brochure lists dozens of named eligible professions for MPL, from accounting and bookkeeping to interior design and technology consulting, some with profession-specific carve-outs. 10 At-Bay's MPL page instead describes eligibility in general terms — businesses of all revenue sizes — and points to a separate appetite guide for specific requirements that this record did not independently open. 3

State Availability

Coterie names six states where MPL is currently unavailable: DC, IL, MA, MT, ND, and VA. 10 At-Bay's MPL page mentions state restrictions on its advertised limit but does not name which states are affected. 3

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

  • If your business is in DC, Illinois, Massachusetts, Montana, North Dakota, or Virginia, confirm Coterie's MPL is actually available before relying on it. 10
  • Ask At-Bay which states carry the restrictions referenced alongside its $5 million ceiling. 3
  • Confirm which each-claim limit tier fits your risk, since Coterie's aggregate multiplier changes at the $1,000,000 tier. 10
  • Ask both companies to name the insurer issuing your specific policy; neither publishes it here. 10 3
  • Ask whether your profession appears on Coterie's eligible-professions list with any listed exclusion, or falls under At-Bay's general appetite guide. 10

Offering Details

At-Bay vs Coterie Insurance Professional Liability (E&O) Insurance: documented features by provider

CriteriaAt-Bay Miscellaneous Professional Liability (MPL) InsuranceCoterie Miscellaneous Professional Liability (MPL)
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. 3,4Company-reported. Current MPL product page and license disclosures; this describes the distribution channel, not who bears the underwriting risk.

Coterie writes Miscellaneous Professional Liability (MPL) as a claims-made policy sold through agents and brokers to protect a small-business client against third-party claims for errors or omissions in their professional services. 10Company-reported. MPL brochure policy-overview paragraph.

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. 3,5Not found in reviewed sources. 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.

The MPL brochure names the policy form 'Coterie Professional Liability Errors and Omissions Insurance Declarations' (form code CTPL CWW PL) but does not name the issuing insurer; that appears only on the policy declarations. 10Company-reported. MPL brochure 'Mandatory Countrywide PL Policy Forms' table.

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. 3Company-reported. Current MPL appetite paragraph; the linked appetite guide's specific eligibility requirements were not independently opened for this record.

Coterie lists dozens of eligible professions for MPL, including accounting services, architects and engineers, bookkeeping, human resources consulting, interior design, property management, real estate agents/brokers, and technology services/IT consulting, each with profession-specific exclusions in some cases (for example, barbers/beauticians exclude services like electrolysis and tattoo services). 10Company-reported. MPL brochure 'Eligible Professions' and 'Eligible Professions (Continued)' lists.

Coterie says MPL is available in most states but is currently unavailable in DC, IL, MA, MT, ND, and VA. 10Company-reported. MPL brochure 'MPL unavailable' note.

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. 3Company-reported. 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.

Coterie's MPL policy covers economic or financial (non-physical) damages arising from wrongful acts in professional services, such as faulty reports or verbal advice that cause a client financial loss; it is written on a claims-made basis covering incidents reported during the policy period or an extended reporting period, occurring after the policy's retroactive date. 10Company-reported. MPL brochure policy overview and 'Professional Liability Limits of Insurance' definitions.

Coterie's MPL base form excludes bodily injury or property damage claims, fraud or intentional wrongful acts, wrongful termination or discrimination claims, and claims based on contractual liability assumed beyond what would exist without the contract, among other listed exclusions. 10Company-reported. MPL brochure 'Professional Liability Policy Base Form Exclusions' list.

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. 3Company-reported. Current appetite paragraph; this is an advertised ceiling, not a guaranteed available limit for any specific applicant.

Coterie offers MPL each-claim limits of $25,000, $50,000, $250,000, $500,000, or $1,000,000, with the aggregate set at two times the each-claim limit (three times for the $1,000,000 option); the basic policy includes a 60-day extended reporting period, with optional purchased extensions of 1 to 6 years, and up to 6 years of prior-acts (retroactive) coverage. 10Company-reported. MPL brochure 'Available Limits' table and 'Extended Reporting Period'/'Retroactive Date' definitions.

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. 3,6Company-reported. Current submission instructions and the general broker-platform workflow description; MPL-specific automation details were not separately confirmed.

MPL is distributed only through agents and brokers using Coterie's quoting platform; the reviewed brochure does not describe a direct-to-business application path. 10Company-reported. MPL brochure framing as 'for Agents and Brokers'.

Full Comparison

Other Professional Liability (E&O) Insurance Comparisons

Sources

At-Bay

  1. Cyber, Tech E&O & Professional Liability Insurance. At-Bay; Product cards and agency disclosure. Accessed 2026-09-16.
  2. At-Bay 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. 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. 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. At-Bay; September 28, 2023 release: final paragraph before Media Contacts. Accessed 2026-09-16.
  6. Broker Platform. At-Bay; How it works: Create a quote, Customize your quote, Bind your policy, Manage renewals; FAQs. Accessed 2026-09-16.

Coterie Insurance

  1. Instant Bindable Small Business Insurance Quotes for Agents. Coterie Insurance; Built for Agents and Brokers; online workflow; core lines; endorsements; availability sections. Accessed 2026-09-15.
  2. Allianz X Announces Strategic Investment in Coterie Insurance. Coterie Insurance and Allianz X; September 11, 2025 announcement; MGA role; Series C investment and reinsurance relationship. Accessed 2026-09-15.
  3. Coterie Insurance small business products overview. Coterie Insurance; Product line overview page listing Professional Liability among Coterie's coverages. Accessed 2026-09-23.
  4. Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers. Coterie Insurance; Policy overview paragraph; Eligible Professions list; 'Currently unavailable in: DC, IL, MA, MT, ND, and VA'; Professional Liability Limits of Insurance table; Claims-Made Policy Form / Retroactive Date / Extended Reporting Period definitions; Mandatory Countrywide PL Policy Forms; Base Form Exclusions. Accessed 2026-09-23.

Professional Liability (E&O) Insurance Guide

  1. FAQ: Professional liability insurance. 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.
  2. 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.
  3. Get business insurance. U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
  4. Professional Liability – US Direct Errors and Omissions Insurance. 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 . 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. To suggest a correction, contact Spot with the page URL and supporting source.

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