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Company lists · Data refreshed September 2026

Top 25 Consultancy services based in Irvine, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 172 companies tracked

RevenueBase identified 172 consultancy services headquartered in Irvine, United States as of September 2026 and tracks 1,933 professional contacts across them, including 839 with verified work emails. New York is the largest hub.

This list covers consultancy services headquartered in Irvine, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review
172Companies
1,933Contacts tracked
839Verified emails
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The 25 largest consultancy services based in Irvine, United States

Ranked by team size
Top 25 of 172 consultancy services based in Irvine, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to consultancy services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
Interwest Consulting Group
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 2026201-500221 contacts →

Indirect evidence

“Interwest specializes in providing professional and consulting services to public agencies across California, Nevada, Colorado, and beyond.”

Source: RevenueBase Database · checked Sep 24, 2026
2
Ocmi, Inc. O'connor Construction Management
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-200168 contacts →

Indirect evidence

“Founded in 1982 by Colm O’Connor, OCMI leads the way in estimating, project controls, and construction management solutions.”

Source: RevenueBase Database · checked Sep 24, 2026
3
Neelblue Technologies
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-200158 contacts →

Indirect evidence

“NeelBlue Technologies provides IT consulting and technical expertise to all its clients across the globe.”

Source: RevenueBase Database · checked Sep 24, 2026
4
Blytheco
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-200133 contacts →

Indirect evidence

“For over 45 years, Blytheco has been the transformation partner of choice for over companies nationwide.”

Source: RevenueBase Database · checked Sep 24, 2026
5
Trivista
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-200107 contacts →

Indirect evidence

“TriVista is a technology and operations consulting firm that partners with business and private equity leaders to improve performance, strengthen supply chains, and accelerate…”

Source: RevenueBase Database · checked Sep 24, 2026
6
Murow Development Consultants, A Crede Company
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20091 contacts →

Indirect evidence

“Murow DC provides superior services in land development improvements, with a high level of experience, expertise, and trust.”

Source: RevenueBase Database · checked Sep 24, 2026
7
EPD Solutions, INC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20064 contacts →

Indirect evidence

“EPD was created to assist clients through the complex regulatory and interdisciplinary process required to bring projects to fruition in the most thoughtful manner.”

Source: RevenueBase Database · checked Sep 24, 2026
8
RJI Cpas
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20059 contacts →

Indirect evidence

“RJI CPAs is a full-service accounting and consulting firm based in Irvine, California.”

Source: RevenueBase Database · checked Sep 24, 2026
9
Intueor Consulting, INC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20052 contacts →

Indirect evidence

“Intueor specializes in Strategy, Operations & Business Productivity advisory work.”

Source: RevenueBase Database · checked Sep 24, 2026
10
Gabe, INC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20046 contacts →

Indirect evidence

“PROFESSIONAL SUPPORT SERVICES We work for you as a preferred provider.”

Source: RevenueBase Database · checked Sep 24, 2026
11
Skinner Fouch & Olson LLP
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-5044 contacts →

Indirect evidence

“Our purpose is to add value to the business of our clientele through transactional specific and organizational business advisory services.”

Source: RevenueBase Database · checked Sep 24, 2026
12
Hummingbird Teksystems, INC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20039 contacts →

Indirect evidence

“Overview: Hummingbird TekSystem, Inc.”

Source: RevenueBase Database · checked Sep 24, 2026
13
MLC And Associates
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-5038 contacts →

Indirect evidence

“MLC and Associates is an award-winning, world-class management consulting firm, recognized for helping companies in every industry with business continuity, corporate performance…”

Source: RevenueBase Database · checked Sep 24, 2026
14
Nexvisionix
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20027 contacts →

Indirect evidence

“At Nexvisionix, we specialize in driving Strategy and Execution excellence, leveraging cutting-edge AI and software to guide global organizations towards breakthrough business…”

Source: RevenueBase Database · checked Sep 24, 2026
15
GPG Advisers
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20023 contacts →

Indirect evidence

“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…”

Source: RevenueBase Database · checked Sep 24, 2026
16
Connexus HUB
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-5020 contacts →

Indirect evidence

“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…”

Source: RevenueBase Database · checked Sep 24, 2026
17
National Engineering & Consulting, INC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20020 contacts →

Indirect evidence

“National Engineering and Consulting, Inc.”

Source: RevenueBase Database · checked Sep 24, 2026
18
Moote Companies LLC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-5018 contacts →

Indirect evidence

“Moote Companies was established from the foundations of The Moote Group which was started in 1974.”

Source: RevenueBase Database · checked Sep 24, 2026
19
Ethos Human Capital Solutions
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 20261-1017 contacts →

Indirect evidence

“When in the midst of business transitions, the road to enduring business growth can be extremely winding and uncertain.”

Source: RevenueBase Database · checked Sep 24, 2026
20
Exyion, INC
Strong evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-5017 contacts →

Strong evidence

“Exyion prides itself in providing highly experienced Utility Industry Consultants with years of experience in many areas of the Utility Business.”

Source: RevenueBase Database · checked Sep 24, 2026
21
Mentor Global Consultants
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-5016 contacts →

Indirect evidence

“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.”

Source: RevenueBase Database · checked Sep 24, 2026
22
Demanddynamics
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 2026201-50014 contacts →

Indirect evidence

“DemandDynamics is in the business of helping its customers maximize their Microsoft Dynamics investment.”

Source: RevenueBase Database · checked Sep 24, 2026
23
Maxwell & Company Cpa's, INC
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202651-20011 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 24, 2026
24
Matrixpoint Consulting
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-509 contacts →

Indirect evidence

“MatrixPoint Consulting helps brand executives in QSR, CPG, and retail grow through marketing they can measure.”

Source: RevenueBase Database · checked Sep 24, 2026
25
Emergent Data
Strong evidenceIrvine, CA, United StatesHQ checked Sep 24, 202611-509 contacts →

Strong evidence

“Emergent Data is a global consultancy that helps clients drive change across the entire data and software ecosystem.”

Source: RevenueBase Database · checked Sep 24, 2026

Showing 25 of 172 consultancy services based in Irvine, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 839 reachable decision-makers.

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Consultancy services based in Irvine, United States at a glance

As of Sep 24, 2026
43.4%Verified-email coverage
11.2Average contacts per company
1-10Median size (employees)
1191.9%Largest-city concentration · New York
Sep 24, 2026Page data refreshed

Companies by employee count

1-10
114
11-50
30
51-200
24
201-500
4

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 172 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among consultancy services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Irvine, United States whose own description of what they do matches “consultancy services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names consultancy services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among consultancy services, and records with no verified work email. Companies headquartered outside Irvine are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 839 across the full list. 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.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Consultancy services by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names consultancy services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 172 consultancy services headquartered in Irvine, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Interwest Consulting Group, headquartered in Irvine, tops this list with the largest team on record.

Which city has the most consultancy services?

New York leads with 2050 headquartered companies, followed by Atlanta (961) and Chicago (961).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 839 verified decision-maker contacts tracked across these 172 companies.

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 Smart Search, 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.

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