Plumb

What Plumb does

Plumb (legally Think Plumb LLC, DBA Plumb Bill Pay) is a privately held financial services firm headquartered in La Jolla, California with a second office in New York City. Founded in 1996 as an outsourced accounting firm providing fractional Controller-level services to small and medium-sized companies, Plumb established a dedicated bill pay and family office division in 2008 after observing that CEOs who sold or retired their businesses lost access to corporate accounting support for personal financial management. The company rebranded to Plumb Bill Pay in 2021 to sharpen its focus on serving high-net-worth individuals and families, with most clients holding $50MM or more in assets. The firm is founder/owner-operated, has between 51 and 100 employees, and reports no external funding or parent ownership.

Plumb's core products consist of Outsourced Bill Pay Services and Family Office Accounting Services, supported by a proprietary Plumb Bill Pay mobile and web application. The platform provides real-time bill approval, expense tracking, cash flow forecasting (including a 6-month projection), vendor management, and secure communication with the Plumb team. The application is built on customized cloud infrastructure with SOC 2 Type II, PCI 3.0, HIPAA, and SSAE-16 Type II compliance, and integrates with Sage Intacct (as an official partner for Family Offices) and QuickBooks Online. A documented 7-step process workflow enforces segregation of duties and multiple review levels. The 2026 leadership appointment of a CTO and the existing Engineering Manager's mandate over applied AI initiatives indicate ongoing platform investment.

Plumb generates revenue through two primary streams: transaction-based fees for bill pay services and entity-based subscription fees for family office accounting, both billed annually over 12-month periods with one-time setup fees. The go-to-market is enterprise-focused B2B field sales targeting HNWI/UHNWI individuals, family offices, and their trusted advisors including RIAs, wealth managers, CPAs, and trust companies. Distribution relies on white-glove consultation requests, direct sales, and an RIA/advisor referral channel. Pricing is not publicly disclosed and varies by transaction volume and entity/account complexity.

Name

Plumb

Legal name

Think Plumb LLC

Website

https://plumbbillpay.com

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

51–100 employees

Short description

Plumb is a privately held firm that provides outsourced bill pay and family office accounting services to high-net-worth individuals and families, using a proprietary mobile app, Sage Intacct ERP integration, and SOC 2-certified cloud infrastructure to serve most clients with $50MM+ in assets.

Ownership category

akta.pro rank

Product category

Family Office Accounting Services

NAICS

Financial Transactions Processing, Reserve, and Clearinghouse Activities (52232)

akta.pro primary industry

Bill Aggregators & Consolidators (FSAMAJAB)

akta.pro secondary industries

Corporate Treasury & Supplier Payments (AP, Mass Payments) (FSAMAKAL), Intercompany & Consolidation Support (Eliminations, Group Reporting Support) (BPAAAGAG)

Keywords

• Outsourced bill pay
• Family office accounting
• Personal financial management
• High net worth services
• Wealth management support

Headquarters

HQ city

La Jolla

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Bill Pay Services: Transaction-based billing model where fees depend on the number of transactions performed monthly. Includes one-time setup fee for establishing processes and schedules. Billed annually over a 12-month period.
2. Family Office Accounting Services: Fees based on number of entities, accounts, properties, and other accounting services required. Includes one-time setup fee. Billed annually over 12-month period.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Plumb provides outsourced bill pay services for high-net-worth individuals and families, managing bill payment, expense tracking, vendor management, and reconciliation through a dedicated accounting team and a proprietary mobile/web application. It also delivers family office accounting services covering investment reconciliation, private equity tracking, consolidated multi-entity financial reporting, entity bookkeeping, cash flow management, trust and foundation accounting, and annual tax organizer preparation. A strategic Sage Intacct integration enables multi-entity consolidation and GAAP-compliant reporting for clients requiring enterprise-grade accounting.

Product overview

Plumb offers a unified suite of financial management services for high-net-worth individuals and family offices, combining high-touch outsourced bill pay services with comprehensive family office accounting. The core offering consists of Outsourced Bill Pay Services and Family Office Accounting Services, supported by the proprietary Plumb Bill Pay App for mobile access and approvals. As a Sage Intacct partner, Plumb also implements and manages Sage Intacct integration for clients requiring advanced multi-entity accounting, real-time consolidation, and enterprise-grade financial reporting. Together, these products deliver end-to-end financial oversight from daily bill payment through complex investment and entity accounting.

Differentiator

Problem solved

Functional benefit

Brands

• Plumb Bill Pay App: Proprietary mobile application providing bill payment access, bill approvals, expense tracking, and financial reporting for clients.

Products and services

• Outsourced Bill Pay Services Full-service outsourced personal and household bill management for high-net-worth individuals and families, including bill payment and recordkeeping, expense tracking, vendor management, and reconciliation, with 24/7 access via the proprietary Plumb Bill Pay App.
• Family Office Accounting Services Comprehensive family office accounting for high-net-worth individuals and family offices, including investment accounting reconciliation, private equity tracking, consolidated financial reporting, multi-entity bookkeeping, cash flow management, budgeting and cash flow projections, foundation accounting, trust accounting, insurance coordination and oversight, and annual tax organizer preparation.
• Plumb Bill Pay App Proprietary mobile and web application for Plumb clients providing real-time bill approvals, bill upload, expense tracking, cash outflow visibility, 6-month cash flow forecasting, balance alerts, a Hot List for priority bills, and secure communication with the Plumb team.

Quantifiable outcome

• 50% reduction in reconciliation time for multi-entity clients
• +3 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability1 record

Feature4 records

Partnerships

One partnership is on record.

• Sage IntacctcoreTechnology or IntegrationStrategic technology partnership where Sage Intacct provides the core ERP platform for Plumb's family office accounting services. Sage Intacct enables multi-entity management, real-time consolidation, automated workflows, and customizable dashboards across multiple entities for HNWI and family office clients.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Aspiriant: Independent, fee-only wealth management and family office firm providing investment management, tax, and family office services to UHNW clients. Comparable boutique scale, service model, and target client profile.
• Cresset: Multi-family office providing wealth management, family office services, and bill pay to UHNW families. Comparable boutique positioning with white-glove service model similar to Plumb's.
• Glenmede: Independent wealth manager and multi-family office offering investment management, trust services, and family office administration. Comparable boutique scale with multi-entity HNWI accounting and bill pay capabilities.
• Crestbridge (TMF Group): Provides outsourced family office services including bill pay, accounting, and multi-entity administration for high-net-worth and ultra-high-net-worth clients. Direct overlap with Plumb's core bill pay and family office accounting offering.

Emerging players

• Empower (Personal Capital): Wealth management platform with bill pay, cash flow tracking, and consolidated reporting for high-net-worth investors. Represents the technology-enabled threat to Plumb's bill pay service line.
• Addepar: Wealth management technology platform offering consolidated reporting, analytics, and increasingly operational tools for family offices. Competes for the technology layer that Plumb partially addresses via Sage Intacct and the Plumb Bill Pay App.

Broad incumbents

• Bill.com: Cloud-based bill pay, AP automation, and spend management platform. While primarily SMB-focused, it represents the broader bill pay infrastructure category that could move upmarket into HNWI/family office use cases.
• Brown Brothers Harriman (Wealth Management): Large private bank and wealth manager with dedicated family office services including bill pay, consolidated reporting, and trust accounting. Competes with Plumb for multi-entity family office mandates at the UHNW end of the market.
• BNY Mellon Wealth Management: Major custodian-affiliated wealth manager with family office and private wealth services including bill pay, trust, and consolidated reporting. Competes with Plumb via bundled custody + family office offering.
• SEI Family Office Services: Provides outsourced investment accounting, consolidated reporting, and back-office services to family offices. Highly comparable on the multi-entity family office accounting and reporting side of Plumb's offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/thinkplumb

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Plumb