Company lists · Data refreshed September 2026

Top 25 IT audits and consulting services worldwide

Name: IT audits and consulting services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 17,919 companies tracked

RevenueBase identified 17,919 IT audits and consulting services worldwide as of September 2026 and tracks 208,211 professional contacts across them, including 58,818 with verified work emails. The United States is the largest market and London the largest hub.

This list covers IT audits and consulting services worldwide, 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 21, 2026. Country and city lists for IT audits and consulting services follow the table.

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 21, 2026 86% judged on-target in blind review

17,919Companies

208,211Contacts tracked

58,818Verified emails

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The 25 largest IT audits and consulting services worldwide

Ranked by team size

Top 25 of 17,919 IT audits and consulting services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT audits and consulting 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Ernst & Young	Indirect evidence	Shi, ChinaHQ checked Sep 21, 2026	10001+	4,476 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
2	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,222 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 21, 2026
3	BDO Brazil	Partial evidence	Sp, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,791 contacts →
	Partial evidence “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Source: RevenueBase Database · checked Sep 21, 2026
4	Grant Thornton Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 21, 2026	1,001-5,000	1,724 contacts →
	Indirect evidence “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Source: RevenueBase Database · checked Sep 21, 2026
5	Sikich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
6	Kpmg Belgium	Indirect evidence	Zaventem, BelgiumHQ checked Sep 21, 2026	1,001-5,000	1,592 contacts →
	Indirect evidence “Uncovering a world of opportunity together.” Source: RevenueBase Database · checked Sep 21, 2026
7	Kpmg Norway	Indirect evidence	Oslo, NorwayHQ checked Sep 21, 2026	1,001-5,000	1,498 contacts →
	Indirect evidence “KPMG er mest kjent som revisorer, forretningskonsulenter og advokater, men vi er også mye mer.” Source: RevenueBase Database · checked Sep 21, 2026
8	Nava Tech For Business	Indirect evidence	Barueri, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,452 contacts →
	Indirect evidence “Atuamos no core de empresas líderes em seus segmentos, onde tecnologia, estratégia e operação se encontram.” Source: RevenueBase Database · checked Sep 21, 2026
9	RSM Ebner Stolz	Indirect evidence	Stuttgart, GermanyHQ checked Sep 21, 2026	1,001-5,000	1,442 contacts →
	Indirect evidence “Wollen Sie jemanden, der Sie auch beim Sprung in neue Märkte und bei allen anstehenden Herausforderungen begleitet?” Source: RevenueBase Database · checked Sep 21, 2026
10	Trace3	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,345 contacts →
	Indirect evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 21, 2026
11	PWC Thailand	Indirect evidence	Bangkok, ThailandHQ checked Sep 21, 2026	1,001-5,000	1,308 contacts →
	Indirect evidence “At PwC, we help clients build trust and reinvent so they can turn complexity into competitive advantage.” Source: RevenueBase Database · checked Sep 21, 2026
12	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 21, 2026
13	Centric Consulting	Partial evidence	Dayton, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,113 contacts →
	Partial evidence “Committed to delivering tailored solutions and unmatched experiences, Centric Consulting is an international business and technology consulting firm that combines the benefits of…” Source: RevenueBase Database · checked Sep 21, 2026
14	Synoptek	Partial evidence	Costa Mesa, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,037 contacts →
	Partial evidence “Synoptek is a leading global managed services provider and technology consulting firm that delivers transformative business results.” Source: RevenueBase Database · checked Sep 21, 2026
15	Coalfire	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	947 contacts →
	Indirect evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 21, 2026
16	Buchanan Technologies	Strong evidence	Grapevine, TX, United StatesHQ checked Sep 21, 2026	501-1,000	818 contacts →
	Strong evidence “As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…” Source: RevenueBase Database · checked Sep 21, 2026
17	MTI	Indirect evidence	Staines-upon-thames, United KingdomHQ checked Sep 21, 2026	201-500	764 contacts →
	Indirect evidence “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Source: RevenueBase Database · checked Sep 21, 2026
18	Softcell Technologies Global Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	501-1,000	763 contacts →
	Partial evidence “With 35 years of experience, Softcell Technologies Global is a trusted IT services provider specialising in (i) IT security and cybersecurity solutions,(ii) cloud / on-premise…” Source: RevenueBase Database · checked Sep 21, 2026
19	Lgs, An IBM Company	Partial evidence	Québec, QC, CanadaHQ checked Sep 21, 2026	501-1,000	742 contacts →
	Partial evidence “A consulting firm providing technology solutions and advisory services to both private and public sector organizations.” Source: RevenueBase Database · checked Sep 21, 2026
20	The Select Group	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 21, 2026	1,001-5,000	651 contacts →
	Partial evidence “TSG is a technology consulting and services partner that helps organizations move faster, operate smarter, and extract greater value from technology investments in rapidly…” Source: RevenueBase Database · checked Sep 21, 2026
21	Vikingcloud	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	628 contacts →
	Indirect evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 21, 2026
22	BDO Austria	Indirect evidence	Wien, AustriaHQ checked Sep 21, 2026	1,001-5,000	599 contacts →
	Indirect evidence “Holen Sie sich eine Datenschutzzertifizierung für Ihr Unternehmen.” Source: RevenueBase Database · checked Sep 21, 2026
23	Dean Dorton	Strong evidence	Lexington, KY, United StatesHQ checked Sep 21, 2026	501-1,000	590 contacts →
	Strong evidence “Dean Dorton provides an integrated suite of audit, tax, business management, consulting, and technology solutions.” Source: RevenueBase Database · checked Sep 21, 2026
24	NIC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	n/a	581 contacts →
	Partial evidence “NIC has been providing IT Solutions, Cybersecurity, and Cloud Services for businesses and organizations for the past two decades.” Source: RevenueBase Database · checked Sep 21, 2026
25	Solomonedwards	Indirect evidence	Wayne, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	557 contacts →
	Indirect evidence “For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT audits and consulting services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names IT audits and consulting services.
Partial evidence: Its own public description names part of IT audits and consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT audits and consulting services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 17,919 IT audits and consulting services worldwide

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IT audits and consulting services worldwide at a glance

As of Sep 21, 2026

28.2%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

10,203

11-50

5,879

51-200

1,350

201-500

286

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 IT audits and consulting 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.
Coverage: Every country. Country and city lists for IT audits and consulting services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “IT audits and consulting 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 IT audits and consulting 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 IT audits and consulting services, and records with no verified work email.
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, 58,818 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 21, 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.

IT audits and consulting services by location

92 lists · largest first

Every IT audits and consulting services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 IT audits and consulting 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 IT audits and consulting services are there worldwide?

RevenueBase identified 17,919 IT audits and consulting services worldwide 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?

Ernst & Young, headquartered in Shi, tops this list with the largest team on record.

Which country has the most IT audits and consulting services?

The United States leads with 3,758 companies, followed by India (1,502) and France (867). Every IT audits and consulting services list by country and city is linked on this page.

Which city has the most IT audits and consulting services?

London leads with 258 headquartered companies, followed by Sao Paulo (243) and Paris (213).

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 58,818 verified decision-maker contacts tracked across these 17,919 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 21, 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.