---
title: "AIG vs biBerk: Umbrella and Excess Liability Insurance"
description: "biBerk ties umbrella response to limits and coverages in existing policies, including no auto extension unless commercial auto is underneath; AIG describes integrated casualty placements and flexible tower positions."
canonical: "https://spot.insure/compare/aig-vs-biberk/umbrella-excess"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "aig-vs-biberk"
provider-a: "aig"
provider-b: "biberk"
coverage-line: "umbrella-excess"
---

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[Human-readable page](https://spot.insure/compare/aig-vs-biberk/umbrella-excess)

## Agent Guide

**What this page is:** Focused comparison of AIG and biBerk for Umbrella and Excess Liability 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 Umbrella and Excess Liability Insurance questions about AIG versus biBerk. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- AIG vs biBerk for Umbrella and Excess Liability Insurance: how do they differ?
- Which is better for Umbrella and Excess Liability Insurance, AIG or biBerk?
- What does AIG or biBerk publish about Umbrella and Excess Liability Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Umbrella and Excess Liability Insurance from AIG or biBerk?

**Key facts:**
- Line: Umbrella and Excess Liability Insurance. Providers: AIG and biBerk.
- 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:**
- [AIG vs biBerk](https://spot.insure/compare/aig-vs-biberk) — parent: all coverage lines for this pair
- [Umbrella and Excess Liability Insurance guide](https://spot.insure/coverage/umbrella-excess) — coverage explainer for this line
- [AIG profile](https://spot.insure/insurance-providers/aig) — provider profile (evidence)
- [biBerk profile](https://spot.insure/insurance-providers/biberk) — provider profile (evidence)
- [AIG vs biBerk Commercial Auto Insurance](https://spot.insure/compare/aig-vs-biberk/commercial-auto) — sibling comparison (other line, or other pair for this line)
- [AIG vs biBerk Cyber Insurance](https://spot.insure/compare/aig-vs-biberk/cyber) — sibling comparison (other line, or other pair for this line)
- [AIG vs biBerk General Liability Insurance](https://spot.insure/compare/aig-vs-biberk/general-liability) — sibling comparison (other line, or other pair for this line)
- [AIG vs biBerk Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-biberk/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [AIG vs biBerk Workers’ Compensation Insurance](https://spot.insure/compare/aig-vs-biberk/workers-compensation) — sibling comparison (other line, or other pair for this line)
- [AIG vs Alliance Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-alliance-risk/umbrella-excess) — sibling comparison (other line, or other pair for this line)
- [AIG vs Amelia Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-amelia-risk/umbrella-excess) — sibling comparison (other line, or other pair for this line)
- [AIG vs Aon Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-aon/umbrella-excess) — sibling comparison (other line, or other pair for this line)
- [AIG vs The Baldwin Group Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-baldwin/umbrella-excess) — sibling comparison (other line, or other pair for this line)
- [AIG vs Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-berkshire-hathaway-specialty-insurance/umbrella-excess) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs biBerk Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-biberk/umbrella-excess) — sibling comparison (other line, or other pair for this line)

# AIG vs biBerk: How Do They Compare for Umbrella and Excess Liability Insurance?

biBerk ties umbrella response to limits and coverages in existing policies, including no auto extension unless commercial auto is underneath; AIG describes integrated casualty placements and flexible tower positions.

## How to Use the AIG vs biBerk Umbrella and Excess Liability Insurance Comparison

Use this comparison to evaluate AIG and biBerk for Umbrella and Excess Liability 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.

## AIG vs biBerk Umbrella and Excess Liability Insurance Summary

biBerk requires an existing liability policy and offers online or phone quotes; AIG describes placements through casualty underwriting without publishing a self-service route. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today")

## What Is AIG?

AIG is the marketing name for American International Group, Inc.; AIG says its insurance products are written or provided by subsidiaries or affiliates. Its U.S. business pages list commercial casualty, property, cyber, management and professional liability, and specialty programs, but a brand-level page does not identify the insurer for a particular policy. [1](https://www.aig.com/investor-relations "Investor Relations") [2](https://www.aig.com/home/risk-solutions/business "Business")

[AIG profile](https://spot.insure/insurance-providers/aig)

## What Is biBerk Insurance?

biBerk focuses on small businesses and describes a direct online path to answer business questions, choose coverage and pay, with an insurance expert available to help. Before you plan around online checkout, confirm that your state and the insurance you need are supported; biBerk says availability depends on both. [4](https://www.biberk.com/ "Small Business Insurance From biBerk | Get A Quote Online") [5](https://www.biberk.com/about-biberk "About biBerk | Making Small Business Insurance Simple")

[biBerk profile](https://spot.insure/insurance-providers/biberk)

## What Is Umbrella and Excess Liability Insurance?

Umbrella or excess insurance adds liability limits above the policies named in the quote after a covered claim exhausts their limits. It may fit if a contract sets higher limits; check which primary policies are listed and any gaps between them. [7](https://www.iii.org/publication/insuring-your-business-small-business-owners-guide-to-insurance/specific-coverages/liability-insurance "Liability Insurance") [8](https://www.insurance.ca.gov/01-consumers/105-type/95-guides/09-comm/commercialguide.cfm "Commercial Insurance Guide") [9](https://www.insurance.ca.gov/0200-industry/0050-renew-license/0200-requirements/casualty/lines-of-ins.cfm "Lines of Insurance") [10](https://www.coverdash.com/coverage "Coverage Hub") [11](https://kinro.com/products "Products")

## What Are the Key Differences Between AIG and biBerk Umbrella and Excess Liability Insurance?

### Structure and attachment

biBerk says umbrella can respond after a covered loss exceeds an underlying liability limit, but only for coverages included in the underlying policy; it gives commercial auto as an example that will not extend if no auto policy sits underneath. AIG describes lead umbrella that may integrate with other casualty lines and says attachment and follow-form terms depend on placement. Businesses should map every scheduled underlying policy before comparing. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today")

### Capacity and account support

biBerk requires an existing liability policy and provides online or phone access to quote its umbrella. AIG markets admitted and non-admitted umbrella and excess capacity but does not describe a direct quote flow in the product summary. Ask biBerk which underlying limits must be in force and AIG which broker channel can place the needed tower. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today")

## What Should You Confirm in AIG and biBerk Umbrella and Excess Liability Insurance Quotes?

- Ask AIG which position, attachment point, and legal insurer apply to the proposed tower. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance")
- Ask biBerk Business to identify underlying policies, limits, and follow-form terms. [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today")

## AIG vs biBerk Umbrella and Excess Liability Insurance Compared

| Criteria | AIG Excess Casualty and Lead Umbrella | biBerk Business Umbrella / Commercial Excess |
| --- | --- | --- |
| Role in This Line | AIG markets admitted and non-admitted excess casualty capacity, including lead umbrella, mid-excess and high-excess positions. The legal insurer and structure for a specific tower are account-specific. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") (Evidence: Company-reported; scope: Role in this product is limited to the description on the linked AIG source..) | Confirm in your quote. |
| Who It’s For | AIG describes lead umbrella, mid-excess and high-excess placements for a wide range of accounts, including small-business and corporate risks. It does not state an account-specific appetite or attachment eligibility. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") (Evidence: Company-reported; scope: Audience is the segment AIG names on the linked source; this is not an underwriting decision, quote or guarantee of availability..) | Confirm in your quote. |
| Coverage Features | AIG describes excess liability protection against severe liabilities and lead umbrella placements that may integrate with other casualty lines. The exact underlying policies, attachment points and follow-form terms depend on the placement. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") (Evidence: Company-reported; scope: AIG’s public product description is not the policy. Actual entitlement depends on the applicable issued form, endorsements and declarations..) | biBerk says umbrella coverage can respond after a covered claim exceeds an applicable existing liability policy limit. [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today") (Evidence: Company-reported; scope: Entity: biBerk brand; underlying issuing company is policy/state-dependent unless stated. Product: small-business umbrella/excess. Jurisdiction: United States; availability varies by state unless stated. Limitation: Company-reported; exact issued policy wording and underwriting determine coverage..)<br><br>biBerk says the umbrella only applies to coverages included in the underlying policy; without commercial auto underneath, auto claims are not added. [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today") (Evidence: Company-reported; scope: Entity: biBerk brand; underlying issuing company is policy/state-dependent unless stated. Product: small-business umbrella/excess. Jurisdiction: United States; availability varies by state unless stated. Limitation: Company-reported; exact issued policy wording and underwriting determine coverage..)<br><br>biBerk lists intentional harm, damage to the insured’s own property, contractual liability and war as examples excluded from umbrella. [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today") (Evidence: Company-reported; scope: Entity: biBerk brand; underlying issuing company is policy/state-dependent unless stated. Product: small-business umbrella/excess. Jurisdiction: United States; availability varies by state unless stated. Limitation: Company-reported; exact issued policy wording and underwriting determine coverage..) |
| Limits and Retentions | AIG advertises up to $75 million total capacity on an individual-account basis, subject to underwriting. This is not a standard or guaranteed limit for a buyer. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") (Evidence: Not publicly disclosed; scope: This statement reports only what the linked public source discloses and does not substitute for a quote or issued policy..) | Confirm in your quote. |
| Risk Services | AIG describes in-house risk experts, claims specialists, litigation-management strategies and integration with domestic and foreign casualty platforms. Those services do not change policy wording. [3](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty "Excess Casualty Insurance") (Evidence: Company-reported; scope: The linked page describes company-reported support; specific account services and third-party arrangements must be confirmed..) | Confirm in your quote. |
| How to Apply | Confirm in your quote. | biBerk offers online or phone access to quote its umbrella, which must accompany an existing liability policy. [6](https://www.biberk.com/small-business-insurance/umbrella-insurance "Umbrella Insurance From biBerk | Get Coverage Today") (Evidence: Company-reported; scope: Entity: biBerk brand; underlying issuing company is policy/state-dependent unless stated. Product: small-business umbrella/excess. Jurisdiction: United States; availability varies by state unless stated. Limitation: Company-reported; exact issued policy wording and underwriting determine coverage..) |

## Related Pages for AIG vs biBerk Umbrella and Excess Liability

- [AIG vs biBerk](https://spot.insure/compare/aig-vs-biberk): all coverage lines, business roles, service and claims.
- [What Is Umbrella and Excess Liability Insurance?](https://spot.insure/coverage/umbrella-excess): Umbrella or excess insurance can add liability limits above selected underlying policies when a covered claim exceeds them; compare the schedule and any gaps.
- [AIG vs biBerk Commercial Auto Insurance](https://spot.insure/compare/aig-vs-biberk/commercial-auto)
- [AIG vs biBerk Cyber Insurance](https://spot.insure/compare/aig-vs-biberk/cyber)
- [AIG vs biBerk General Liability Insurance](https://spot.insure/compare/aig-vs-biberk/general-liability)
- [AIG vs biBerk Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-biberk/professional-errors-omissions)
- [AIG vs biBerk Workers’ Compensation Insurance](https://spot.insure/compare/aig-vs-biberk/workers-compensation)
- [AIG vs Alliance Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-alliance-risk/umbrella-excess)
- [AIG vs Amelia Risk Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-amelia-risk/umbrella-excess)
- [AIG vs Aon Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-aon/umbrella-excess)
- [AIG vs The Baldwin Group Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-baldwin/umbrella-excess)
- [AIG vs Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance](https://spot.insure/compare/aig-vs-berkshire-hathaway-specialty-insurance/umbrella-excess)
- [Alliance Risk vs biBerk Umbrella and Excess Liability Insurance](https://spot.insure/compare/alliance-risk-vs-biberk/umbrella-excess)

## Sources for AIG vs biBerk Umbrella and Excess Liability Insurance

### Sources About AIG

1. [Investor Relations](https://www.aig.com/investor-relations). American International Group, Inc. (AIG); About AIG and legal footer; lines 244–246 and 327–331. Accessed 2026-09-28.
2. [Business](https://www.aig.com/home/risk-solutions/business). AIG US; Surplus Lines heading and paragraph, lines 357–359. Accessed 2026-09-28.
3. [Excess Casualty Insurance](https://www.aig.com/home/risk-solutions/business/casualty/excess-casualty). AIG; Official AIG Excess Casualty page: admitted/non-admitted options, lead umbrella/mid/high excess placements, advertised per-account capacity subject to underwriting, domestic/foreign integration, risk and claims services.. Accessed 2026-09-30.

### Sources About biBerk

4. [Small Business Insurance From biBerk | Get A Quote Online](https://www.biberk.com/). biBerk; Online purchase steps, lines 183–197; small-business audience and industries, lines 231–238; state/type availability, lines 290–295. Accessed 2026-09-28.
5. [About biBerk | Making Small Business Insurance Simple](https://www.biberk.com/about-biberk). biBerk; Making small business insurance simple and direct sales without an insurance broker, lines 72–89; online assistance, lines 76–78. Accessed 2026-09-28.
6. [Umbrella Insurance From biBerk | Get Coverage Today](https://www.biberk.com/small-business-insurance/umbrella-insurance). biBerk; Coverage trigger, underlying policies and exclusions. Accessed 2026-09-28.

### Sources for the Umbrella and Excess Liability Insurance Guide

7. [Liability Insurance](https://www.iii.org/publication/insuring-your-business-small-business-owners-guide-to-insurance/specific-coverages/liability-insurance). Insurance Information Institute; Heading Umbrella Liability Insurance; sentence Umbrella Liability—also known as Excess Liability Insurance; underlying policies listed with limits; typically GL, auto and employers’ liability; starts when a covered loss exhausts the primary per occurrence limit; Most umbrella policies exclude EPL, professional liability, product recall, workers compensation, asbestos, pollution, war and terrorism. Accessed 2026-09-16.
8. [Commercial Insurance Guide](https://www.insurance.ca.gov/01-consumers/105-type/95-guides/09-comm/commercialguide.cfm). California Department of Insurance; Commercial Umbrella; excess over a basic liability policy; auto/CGL/WC or any liability policy can be covered; may respond if basic policy not in force or for gaps; SIR when no underlying. Accessed 2026-09-16.
9. [Lines of Insurance](https://www.insurance.ca.gov/0200-industry/0050-renew-license/0200-requirements/casualty/lines-of-ins.cfm). California Department of Insurance; Umbrella or Excess Liability Policy: excess limits over existing liability; may provide additional coverages not provided by underlying policies. Accessed 2026-09-16.
10. [Coverage Hub](https://www.coverdash.com/coverage). Coverdash; Excess & Specialty: Umbrella; Excess Liability. Accessed 2026-09-16.
11. [Products](https://kinro.com/products). Kinro; 09 Umbrella/Excess: additional limits above scheduled underlying policies; when to review; reviewed with. 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.

## AIG Review Scores for 2026

Review Score: 4.4 / 10 from 2 rated sources, equally weighted.

Customer ratings for AIG are low: Trustpilot shows 1.9 out of 5 from 252 reviews, and NerdWallet gives 2.5 stars and notes more claims complaints than expected. These pages cover many AIG products and countries, so they only loosely describe business insurance.

- NerdWallet: NerdWallet editorial rating 2.5 (stars). NerdWallet’s editorial business-insurance comparison; the AIG entry concerns commercial liability and property insurance, not a quantified policyholder-review sample. The page’s complaint statement and 2.5-star editorial rating are source-specific and must not be recast as a consumer average. Checked 2026-09-29. [Business Insurance: Get Quotes and Coverage Today](https://www.nerdwallet.com/business/insurance/best)
- Trustpilot: Trustpilot TrustScore 1.9 (out of 5); 252 reviews. Consumer reviews on aig.com’s Trustpilot profile span products and countries, including personal, travel, device/service and other experiences; they do not isolate U.S. commercial-P&C policyholders or a single issuing insurer. Checked 2026-09-29. [AIG Reviews](https://www.trustpilot.com/review/aig.com)
- ConsumerAffairs: ConsumerAffairs average 1.0 (out of 5); 274 reviews. ConsumerAffairs page titled AIG Life Insurance Reviews, updated 2026-08-14. The page mixes life and high-net-worth home references and reviewers may describe other AIG relationships; it is not a commercial-P&C-only population. Checked 2026-09-29. [AIG Life Insurance Reviews](https://www.consumeraffairs.com/insurance/aig_life.html)
- BBB: Complaints shown, prior 3 years 270. BBB’s American International Group, Inc. headquarters profile and corporate-owned locations (86 listed locations); complaint data is not limited to commercial insurance or a particular risk-bearing insurer. BBB says displayed complaint text may not represent every complaint. Period: Three years ending as displayed 2026-09-29. Checked 2026-09-29. [American International Group, Inc. (AIG) BBB Complaints](https://www.bbb.org/us/ny/new-york/profile/insurance-companies/american-international-group-inc-aig-0121-1515/complaints)

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

## biBerk Review Scores for 2026

Review Score: 9.0 / 10 from 3 rated sources, equally weighted.

Customers rate biBerk well: Trustpilot shows 4.5 out of 5 from 2,620 reviews, and NerdWallet gives it 4.0. The complaints are about slow service after you buy, billing and audits, and slow refunds.

- NerdWallet: NerdWallet editorial rating 4.0 (out of 5). NerdWallet's own editorial review of biBerk as a US small-business insurer. Not a customer average. Period: updated Feb 13, 2026. Checked 2026-09-29. [biBerk Insurance Review 2026](https://www.nerdwallet.com/business/insurance/learn/biberk-insurance)
- Trustpilot: TrustScore 4.5 (out of 5); 2620 reviews. Trustpilot's biBerk profile. All lines and states; not tied to a specific policy. Period: profile accessed 2026-09-29; 714 in last 12 months. Checked 2026-09-29. [biBerk Business Insurance Reviews](https://www.trustpilot.com/review/biberk.com)
- BBB: BBB business grade A+ (BBB letter grade). BBB Omaha, NE profile for biBerk, a Berkshire Hathaway Company. Grade, reviews and complaints are separate measures. Period: profile accessed 2026-09-29. Checked 2026-09-29. [biBerk, a Berkshire Hathaway Company - BBB profile](https://www.bbb.org/us/ne/omaha/profile/insurance-agency/biberk-a-berkshire-hathaway-company-0714-300108690); [biBerk BBB customer reviews](https://www.bbb.org/us/ne/omaha/profile/insurance-agency/biberk-a-berkshire-hathaway-company-0714-300108690/customer-reviews); [biBerk BBB complaints](https://www.bbb.org/us/ne/omaha/profile/insurance-agency/biberk-a-berkshire-hathaway-company-0714-300108690/complaints)

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

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/aig-vs-biberk/umbrella-excess.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)