Company lists · Data refreshed September 2026

Top 25 Consultancy firms based in Irvine, United States

Name: Consultancy firms based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 141 companies tracked

RevenueBase identified 141 company matches for consultancy firms associated with Irvine, United States as of September 2026 and tracks 1,533 professional contacts across them, including 779 with verified work emails. Across the United States, New York is the largest hub for this category (2,098 companies); Irvine has 141.

This list covers company matches for consultancy firms associated with Irvine, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 24, 2026 How this list was built

141Companies

1,533Contacts tracked

779Verified emails

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The 25 largest consultancy firms based in Irvine, United States

Ranked by team size

Top 25 of 141 company matches for consultancy firms based in Irvine, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 24, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Interwest Consulting Group	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	201-500	221 contacts →
	Exact match “Interwest specializes in providing professional and consulting services to public agencies across California, Nevada, Colorado, and beyond.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
2	John Burns Research And Consulting	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	183 contacts →
	Exact match “Our team produces independent research and custom consulting advice to help executives make the most informed decisions possible.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
3	Ocmi, Inc. O'connor Construction Management	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	168 contacts →
	Exact match “Founded in 1982 by Colm O’Connor, OCMI leads the way in estimating, project controls, and construction management solutions.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
4	Tk1sc	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	201-500	105 contacts →
	Exact match “We are now part of WSP, a world leading, multi-disciplinary consulting firm.#BecomingWSP #WeAreWSP” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
5	RJI Cpas	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	59 contacts →
	Exact match “RJI CPAs is a full-service accounting and consulting firm based in Irvine, California.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
6	Intueor Consulting, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	52 contacts →
	Exact match “Intueor specializes in Strategy, Operations & Business Productivity advisory work.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
7	Compassx Group	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	47 contacts →
	Exact match “CompassX is a local-model consulting firm headquartered in SoCal.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
8	Skinner Fouch & Olson LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	44 contacts →
	Exact match “Our purpose is to add value to the business of our clientele through transactional specific and organizational business advisory services.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
9	MLC And Associates	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	38 contacts →
	Exact match “MLC and Associates is an award-winning, world-class management consulting firm, recognized for helping companies in every industry with business continuity, corporate performance…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
10	Nexvisionix	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	27 contacts →
	Exact match “At Nexvisionix, we specialize in driving Strategy and Execution excellence, leveraging cutting-edge AI and software to guide global organizations towards breakthrough business…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
11	GPG Advisers	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	23 contacts →
	Exact match “We provide innovative solutions that create value in the real estate industry -Our team has direct experience in running and managing large portfolios -We provide tailored…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
12	Jc&company LLP	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	23 contacts →
	Exact match “JC & Company LLP is a professional firm committed to serving the needs of our clients.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
13	The Adler Group	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	21 contacts →
	Exact match “Empowering organizations to hire great people by delivering the only end-to-end performance-based approach to hiring.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
14	Connexus HUB	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	20 contacts →
	Exact match “Connexus Hub is a boutique business and technology advisory firm that specializes in CIO advisory, IT PMO support, and business transformation services, training, and operations…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
15	Moote Companies LLC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	18 contacts →
	Exact match “Moote Companies was established from the foundations of The Moote Group which was started in 1974.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
16	Allitix	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	18 contacts →
	Exact match “We are a people-driven consulting firm which prioritizes the goals and vision of our clients as number one.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
17	Wincorp Solutions	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	18 contacts →
	Exact match “Founded in 2009, WinCorp Solutions, headquartered in Irvine, CA, was established by former publicly held company executives.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
18	Exyion, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	17 contacts →
	Exact match “Exyion prides itself in providing highly experienced Utility Industry Consultants with years of experience in many areas of the Utility Business.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
19	Mentor Global Consultants	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	16 contacts →
	Exact match “MENTOR is a management consulting firm that helps organizations to improve performance and reach their full potential, by offering a unique combination of business solutions.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
20	Matrixpoint Consulting	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	9 contacts →
	Exact match “MatrixPoint Consulting helps brand executives in QSR, CPG, and retail grow through marketing they can measure.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
21	Fatbee Studio	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	9 contacts →
	Exact match “FatBee Studio is a full service brand consultancy agency.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
22	The Saros Group	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	8 contacts →
	Exact match “We "fill an ever-growing value gap" in the consulting marketplace between strategy and commodity delivery services at cost significantly lower than big 4 services for like…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
23	Montfichet & Company	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	7 contacts →
	Exact match “Montfichet is a management consulting company offering clients a focused range of fully integrated solutions in areas that include strategic planning, marketing automation, sales…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
24	Xpand Legal Consulting, LLC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	7 contacts →
	Exact match “Xpand’s taking a fresh look at the processes and procedures that have dominated the legal administration space for decades and quickly finding there is plenty of opportunity to…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
25	Take Ctrl	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	1-10	7 contacts →
	Exact match “Consulting - We provide business consulting to small businesses in the Orange County area.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “consultancy firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 141 consultancy firms based in Irvine, United States

See the full list, filter by size, metro and specialty, and access 779 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Consultancy firms based in Irvine, United States at a glance

As of Sep 24, 2026

50.8%Verified-email coverage

10.9Average contacts per company

1-10Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 141 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Irvine, United States whose business descriptions match “consultancy firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 779 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 24, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Consultancy firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “consultancy firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many consultancy firms are there based in Irvine, United States?

RevenueBase identified 141 company matches for consultancy firms associated with Irvine, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Interwest Consulting Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most consultancy firms?

New York leads the United States with 2,098 company records, followed by Chicago (827) and Atlanta (777). Irvine has 141.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 779 professional contacts with verified work emails tracked across these 141 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 24, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.