What GRASSI does

GRASSI is a national advisory, tax, and accounting firm providing professional services to enterprise and mid-market clients across 12 specialized industry verticals. Founded in 1980 and headquartered in New York with offices in the Northeast, Mid-Atlantic, and New England, the firm operates through an alternative practice structure comprising Grassi Advisory Group, Inc. and Grassi & Co. Certified Public Accountants, PC, employing 251-500 professionals. Core verticals include Construction (its oldest and largest practice, ranked #11 nationally by Construction Executive), Healthcare, Manufacturing & Distribution, Nonprofit, Financial Services, Franchise, Architecture & Engineering, Cannabis, Energy & Utilities, Real Estate, Automotive, and Sports & Entertainment. The firm delivers three service lines—Advisory, Tax, and Accounting—augmented by modular offerings such as CFO Advisory, Transaction Advisory, ESOP Services, Technology Consulting, ESG Advisory, Forensic/Litigation/Valuation, and Crisis Response & Recovery.

The firm's business model is relationship-driven professional services with engagement-based, quote-based pricing and multi-year contract billing cadence. Revenue mechanics rely on direct sales to enterprise and mid-market clients across regulated industries, leveraging PCAOB registration, HUD/LIHTC compliance credentials, SOC audit capability, and technology integrations with Geneva (Advent), Lukka, World-Check, and eVestment. International reach is delivered through membership in PrimeGlobal, providing access to 300+ member firms across 128 countries without the capital intensity of owned foreign offices. Thought leadership channels include industry surveys (Construction & A&E, Nonprofit Leadership, Food & Beverage Manufacturing), webinars, the CannaTalk podcast, and email newsletters—supporting a brand-led, top-of-funnel demand generation strategy.

In 2023, Grassi became employee-owned via an ESOP, making it the second-largest ESOP-owned CPA firm in the United States—a structural choice founder Louis C. Grassi explicitly preferred over private equity to preserve client focus, independence, and culture. The firm combines organic growth (45+ years) with selective M&A, exemplified by the 2025 acquisition of OnePoint Franchise Accounting to deepen its franchise vertical. Client retention signals are strong: 84% NPS (2x industry average), 87.3% of clients rating satisfaction 9 or 10 out of 10, and 98% nonprofit client satisfaction, with over 550 construction clients and 500+ nonprofit clients indicating a broad, diversified revenue base rather than concentrated client dependency.

Name

GRASSI

Legal name

Grassi Advisory Group, Inc. and Grassi & Co. Certified Public Accountants, PC

Website

https://grassiadvisors.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

251–500 employees

Short description

GRASSI is a national advisory, tax, and accounting firm founded in 1980, serving enterprise and mid-market clients across 12 industry verticals including Construction, Healthcare, Manufacturing, Nonprofit, and Financial Services. The ESOP-owned firm delivers audit, tax, advisory, and technology consulting through 251-500 professionals in the US and PrimeGlobal partners internationally.

Ownership category

akta.pro rank

Product category

Professional Accounting & Advisory Services

NAICS

Other Scientific and Technical Consulting Services (54169), Portfolio Management and Investment Advice (523940)

SIC

Services-Management Services (8741), Investment Advice (6282)

akta.pro primary industry

ESG Governance, Sustainability Reporting & Assurance Advisory (BPAHAFAJ)

akta.pro secondary industry

ESG/Sustainable Investment Advisory (FSAEAAAJ)

Keywords

• Professional accounting services
• Tax advisory services
• Business consulting
• Audit and assurance
• Transaction advisory

Headquarters

HQ city

Jericho

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Advisory Services: CFO advisory, construction monitoring, corporate restructuring, crisis response, ESG, ESOP services, family office, forensic accounting, litigation support, HR advisory, internal audit, international advisory, operational reviews, private client services, technology consulting, transaction advisory
2. Tax Services: Tax planning and compliance, tax credits and incentives, tax controversy, state and local tax, international tax, trust and estate planning
3. Accounting Services: Audits, reviews and compilations, client accounting and advisory services, employee benefit plans, SOC audits, public company services, PCAOB audits

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

GRASSI is a top-100 U.S. professional services firm providing accounting, audit, tax planning and compliance, transaction advisory, CFO advisory, forensic and valuation, ESG advisory, and sector-specific consulting services. The firm serves middle-market and enterprise clients across more than fourteen industries through dedicated practice leaders, with international reach delivered via the PrimeGlobal network. Operations are anchored by an ESOP ownership model that aligns partner and employee incentives with client outcomes.

Product overview

Grassi is a national advisory, tax, and accounting firm structured as an employee-owned alternative practice structure comprising Grassi Advisory Group, Inc. and Grassi & Co. Certified Public Accountants, PC. The firm operates three core service lines—Advisory Services, Tax Services, and Accounting Services—augmented by specialized industry practices covering Construction (their largest), Architecture & Engineering, Automotive, Cannabis, Energy & Utilities, Financial Services, Franchises, Healthcare, Manufacturing & Distribution, Nonprofit, Real Estate, and Sports & Entertainment. Advisory services are delivered through modular offerings including CFO Advisory, Technology Consulting, Transaction Advisory, Crisis Response & Recovery, ESG Advisory, ESOP Services, and Forensic/Litigation/Valuation. Tax services span federal planning and compliance, SALT, international tax, and trust & estate. Accounting services include audit/review/compilation, SOC Audits, and PCAOB services. The firm also maintains a Tariff Hub resource center. Services are delivered by experienced CPAs, CFOs, and industry specialists across multiple US offices, with international reach through PrimeGlobal membership.

Differentiator

Problem solved

Functional benefit

Products and services

• Advisory Services Multi-disciplinary business advisory services delivered to middle-market and enterprise clients across GRASSI's industry verticals, including consulting on strategic, operational, financial, and organizational matters.
• Tax Services Tax compliance, planning, and preparation services for businesses and individuals, including multi-state tax, international tax via PrimeGlobal, and industry-specific tax work.
• Accounting & Audit Services Financial statement preparation, audit, review, and compilation services, including PCAOB-registered audits of SEC issuers and broker-dealers, GAAP and IFRS reporting, and attest services.
• Transaction Advisory Services Buy-side and sell-side due diligence, deal structuring support, and transaction consulting for middle-market M&A, private equity-backed transactions, and corporate restructurings.
• CFO Advisory Services Outsourced, interim, and supplemental CFO services covering financial leadership, controllership, treasury, FP&A, and reporting modernization for clients without a full-time CFO.
• Forensic, Litigation & Valuation Services Forensic accounting, business valuation, expert witness, and litigation support services for legal counsel, business owners, and courts.
• ESG Advisory Services Environmental, social, and governance advisory including ESG strategy, reporting, controls, and assurance readiness for organizations subject to ESG disclosure or stakeholder scrutiny.
• Construction Industry Services Industry-specialized accounting, audit, tax, and advisory services for construction contractors, construction managers, and real estate developers, led by a dedicated construction industry practice leader.
• Architecture & Engineering Industry Services Accounting, audit, tax, and advisory services tailored to architecture and engineering firms, addressing project-based accounting, contract billing, and firm-specific tax needs.
• Automotive Industry Services Accounting, audit, tax, and advisory services tailored to automotive dealerships, dealership groups, and automotive-related businesses.
• Cannabis Industry Services Accounting, audit, tax, and advisory services for cannabis cultivators, processors, dispensaries, and ancillary businesses navigating 280E and state-level regulatory frameworks.
• Energy & Utilities Industry Services Accounting, audit, tax, and advisory services for energy producers, utilities, and energy-services companies facing regulated and capital-intensive operations.
• Financial Services Industry Services Accounting, audit, tax, and advisory services for broker-dealers, investment advisers, private funds, and other financial services firms, supported by GRASSI's PCAOB registration.
• Franchise Industry Services Accounting, audit, tax, and advisory services for franchise operators, multi-unit franchisees, and franchisors addressing franchise-specific reporting and royalty structures.
• Healthcare Industry Services Accounting, audit, tax, and advisory services for healthcare providers, physician practices, and healthcare-related organizations, delivered through a dedicated healthcare industry practice and the Grassi Healthcare Advisors subsidiary.
• Manufacturing & Distribution Industry Services Accounting, audit, tax, and advisory services for manufacturers, distributors, and wholesalers covering cost accounting, inventory valuation, and supply-chain tax planning.
• Nonprofit Industry Services Accounting, audit (including single audit), tax (Form 990), and advisory services for nonprofit organizations, foundations, and other tax-exempt entities.
• Real Estate Industry Services Accounting, audit, tax, and advisory services for real estate owners, developers, investors, and property managers including entity structuring and real estate-specific tax planning.
• Sports & Entertainment Industry Services Accounting, audit, tax, and advisory services for sports teams, leagues, agencies, and entertainment companies with industry-specific revenue recognition and royalty/comps reporting.
• International Advisory Services Cross-border accounting, tax, and advisory engagements delivered through GRASSI's membership in the PrimeGlobal international association of independent accounting firms.
• ESOP Services Advisory, compliance, and ongoing support for companies that are Employee Stock Ownership Plans (ESOPs), including formation, feasibility, valuation, and annual compliance work; relevant given GRASSI's own ESOP structure.
• HUD & LIHTC Compliance Services Specialized compliance services for HUD-assisted properties and Low-Income Housing Tax Credit (LIHTC) projects, including cost certification, audited financial statements, and regulatory reporting.
• Coordinated Assessment System (CAS) Services Coordinated Assessment System compliance and reporting services for nonprofits receiving city, state, or county social-services funding that requires CAS-aligned outcomes reporting.
• Construction Monitoring Services Construction loan monitoring and draw-request review services for lenders and developers financing construction projects.
• Crisis Response & Recovery Services Short-term crisis, disaster, and business-interruption response services including claims preparation, insurance recovery, and business continuity support.
• Private Client Services Personal financial planning, individual tax, and wealth-related advisory services for high-net-worth individuals, families, and business owners.
• Technology Consulting Services Consulting and advisory on accounting and operational technology selection, implementation, and optimization (e.g., ERP, financial systems) for clients across industries.

Quantifiable outcome

• 84% Net Promoter Score, more than double the industry average of 38%
• +3 more outcomes

Named customers13 records

Segments12 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature2 records

Partnerships

One partnership is on record.

• PrimeGlobalcoreStrategic or Co-development PartnerGrassi is a member of PrimeGlobal, an award-winning association of independent member firms. PrimeGlobal comprises more than 300 highly successful independent member firms in 128 countries, with combined revenue of US $7.2 billion. Member firms employ over 4,300 partners and 57,000 employees across 1,300+ locations. This membership enables Grassi to serve clients internationally and provides access to global expertise.

Scale indicators11 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• WithumSmith+Brown: Top-30 U.S. accounting and advisory firm (Withum) operating a multi-vertical, mid-market advisory model with sports & entertainment, construction, and technology consulting practices that overlap directly with Grassi's verticals.
• Marks Paneth: NY-headquartered advisory and accounting firm serving real estate, nonprofit, construction, and professional services clients — overlapping practice mix and regional footprint with Grassi.
• Anchin, Block & Anchin: New York–based mid-market advisory and accounting firm with deep construction, real estate, and professional services practices — direct Northeast competitor to Grassi.
• Citrin Cooperman: Top-50 U.S. advisory and accounting firm with a comparable multi-vertical model (construction, manufacturing, nonprofit, real estate) and similar mid-market and family-business orientation. Closest structural comp to Grassi in size, ESOP-free employee culture, and industry diversification.
• CohnReznick: Top-30 U.S. advisory firm with strong construction, real estate, nonprofit, and healthcare practices; similar mid-market positioning and East Coast concentration as Grassi.
• Aprio: Advisory-led, multi-vertical firm (construction, manufacturing, nonprofit, professional services) operating in a similar size band with comparable specialization strategy.

Broad incumbents

• BDO USA: Top-5 U.S. accounting and advisory firm with PCAOB capability and deep construction, real estate, and nonprofit practices; represents the scale-up competitive threat Grassi faces when mid-market clients outgrow regional firms.
• RSM US: Top-5 U.S. mid-market advisory and accounting firm with construction, manufacturing, and nonprofit verticals — sets the upper-bound competitive threat to Grassi's mid-market clients.
• Crowe LLP: Top-10 U.S. advisory and accounting firm with construction, healthcare manufacturing, and financial services practices — broad incumbent directly competing for Grassi-sized engagements.
• Baker Tilly US: Top-10 U.S. advisory and accounting firm with overlapping industry coverage (construction, healthcare, manufacturing, real estate). Larger incumbent competing for the same mid-market and rising-mid-market clients.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/grassiadvisors
• Facebookfacebook.com/grassiadvisors1
• LinkedInlinkedin.com/company/grassiadvisors

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

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

M&A2 records

Investments

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

Frequently asked questions about GRASSI