Company lists · Data refreshed September 2026

Top 25 Operational technology consulting firms worldwide

Name: Operational technology consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 38,116 companies tracked

RevenueBase identified 38,116 operational technology consulting firms worldwide as of September 2026 and tracks 565,525 professional contacts across them, including 158,824 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers operational technology consulting firms 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 29, 2026. Country and city lists for operational technology consulting firms 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 29, 2026 86% judged on-target in blind review

38,116Companies

565,525Contacts tracked

158,824Verified emails

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The 25 largest operational technology consulting firms worldwide

Ranked by team size

Top 25 of 38,116 operational technology consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to operational technology consulting firms: 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	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 29, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 29, 2026
2	Bearingpoint	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 29, 2026	5,001-10,000	8,106 contacts →
	Partial evidence “BearingPoint is an independent management and technology consultancy.” Source: RevenueBase Database · checked Sep 29, 2026
3	Wavestone	Strong evidence	100-101 Terrasse Boieldieu, FranceHQ checked Sep 29, 2026	1,001-5,000	6,190 contacts →
	Strong evidence “Wavestone is a leading consulting firm operating at the intersection of business and technology.” Source: RevenueBase Database · checked Sep 29, 2026
4	Groupe SII	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	10001+	4,928 contacts →
	Partial evidence “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Source: RevenueBase Database · checked Sep 29, 2026
5	Amaris Consulting	Strong evidence	Chêne-bourg, SwitzerlandHQ checked Sep 29, 2026	5,001-10,000	4,824 contacts →
	Strong evidence “Amaris Consulting is an independent technology consulting firm providing guidance and solutions to businesses.” Source: RevenueBase Database · checked Sep 29, 2026
6	Management Solutions	Partial evidence	Madrid, SpainHQ checked Sep 29, 2026	1,001-5,000	4,468 contacts →
	Partial evidence “Management Solutions is a leading provider of business consulting services for regulated industries.” Source: RevenueBase Database · checked Sep 29, 2026
7	Bilfinger	Indirect evidence	Mannheim, GermanyHQ checked Sep 29, 2026	10001+	4,035 contacts →
	Indirect evidence “Bilfinger is an international industrial services provider with a vision to be the No.” Source: RevenueBase Database · checked Sep 29, 2026
8	Genpact Headstrong Capital Markets	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 2026	10001+	3,109 contacts →
	Partial evidence “Genpact Headstrong Capital Markets is a global consulting and IT services company with a specialized focus in capital markets.” Source: RevenueBase Database · checked Sep 29, 2026
9	Alten Italia	Indirect evidence	Milano, ItalyHQ checked Sep 29, 2026	1,001-5,000	3,085 contacts →
	Indirect evidence “Il Gruppo ALTEN, leader europeo nella consulenza per le tecnologie avanzate in campo ingegneristico e ICT, è quotato alla Borsa di Parigi e vanta più di 57.700 collaboratori in…” Source: RevenueBase Database · checked Sep 29, 2026
10	AHEAD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,989 contacts →
	Indirect evidence “AHEAD accelerates strategy into execution by engineering integrated solutions across infrastructure, applications, data, and security.” Source: RevenueBase Database · checked Sep 29, 2026
11	Entrust Solutions Group	Partial evidence	Lisle, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,966 contacts →
	Partial evidence “ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: RevenueBase Database · checked Sep 29, 2026
12	AUBAY	Indirect evidence	Boulogne Billancourt, FranceHQ checked Sep 29, 2026	5,001-10,000	2,670 contacts →
	Indirect evidence “Present in 7 countries in Europe, Aubay has more than 7800 employees and has generated revenues of € 513,5 million in 2022, with year on year growth consistently.” Source: RevenueBase Database · checked Sep 29, 2026
13	Hexagon Asset Lifecycle Intelligence	Indirect evidence	Madison, AL, United StatesHQ checked Sep 29, 2026	10001+	2,630 contacts →
	Indirect evidence “Hexagon’s Asset Lifecycle Intelligence division helps clients design, construct and operate more profitable, safe and sustainable industrial facilities.” Source: RevenueBase Database · checked Sep 29, 2026
14	Speridian Technologies	Strong evidence	Albuquerque, NM, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,619 contacts →
	Strong evidence “Speridian Technologies is a global consulting and technology services firm that helps enterprises and public sector organizations modernize operations, enhance customer experience…” Source: RevenueBase Database · checked Sep 29, 2026
15	Etteplan	Partial evidence	Espoo, FinlandHQ checked Sep 29, 2026	1,001-5,000	2,510 contacts →
	Partial evidence “We are a technology service company that, with our thinkers and doers, enable breakthroughs that help industrial businesses change.” Source: RevenueBase Database · checked Sep 29, 2026
16	EOH	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 29, 2026	1,001-5,000	2,093 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
17	Yokogawa India Limited	Indirect evidence	Bangalore, IndiaHQ checked Sep 29, 2026	1,001-5,000	1,803 contacts →
	Indirect evidence “Yokogawa India Limited, incorporated in 1987, is an affiliate of Yokogawa Electric Corporation, Japan, having strong marketing and service network across India.” Source: RevenueBase Database · checked Sep 29, 2026
18	Accenture Poland	Indirect evidence	Warszawa, PolandHQ checked Sep 29, 2026	5,001-10,000	1,738 contacts →
	Indirect evidence “Accenture to wiodąca, globalna firma świadcząca profesjonalne usługi na rzecz przedsiębiorstw, będących światowymi liderami, a także organizacji rządowych i pozarządowych.” Source: RevenueBase Database · checked Sep 29, 2026
19	Future Focus Infotech Private Limited	Partial evidence	Sharjah, JapanHQ checked Sep 29, 2026	1,001-5,000	1,608 contacts →
	Partial evidence “Enabling Your Digital Future Future Focus Infotech (FFI) is your strategic partner for transformative digital solutions and IT consulting.” Source: RevenueBase Database · checked Sep 29, 2026
20	Solita	Indirect evidence	Tampere, FinlandHQ checked Sep 29, 2026	1,001-5,000	1,495 contacts →
	Indirect evidence “We create impact that lasts by combining tech, data and human insight.” Source: RevenueBase Database · checked Sep 29, 2026
21	DSS	Partial evidence	Geneva, United KingdomHQ checked Sep 29, 2026	1,001-5,000	1,493 contacts →
	Partial evidence “dss⁺ is the operational transformation partner for complex and high-hazard industries.” Source: RevenueBase Database · checked Sep 29, 2026
22	LEVIO	Strong evidence	Québec, QC, CanadaHQ checked Sep 29, 2026	1,001-5,000	1,403 contacts →
	Strong evidence “Levio is a leading North American technology‑focused consulting firm and one of the two largest system integrators fully owned by Canadian interests, specializing in digital…” Source: RevenueBase Database · checked Sep 29, 2026
23	Sofrecom Tunisie	Indirect evidence	Tunis, TunisiaHQ checked Sep 29, 2026	1,001-5,000	1,397 contacts →
	Indirect evidence “Sofrecom, filiale du groupe France Télécom - Orange, a développé depuis plus de 45 ans un savoir-faire unique dans les métiers de l’opérateur, qui en fait aujourd’hui l’un des…” Source: RevenueBase Database · checked Sep 29, 2026
24	Canvia	Indirect evidence	Surco, PeruHQ checked Sep 29, 2026	1,001-5,000	1,365 contacts →
	Indirect evidence “We are CANVIA, an innovation and reinvention company At CANVIA we boost and support the digital transformation process of our clients.” Source: RevenueBase Database · checked Sep 29, 2026
25	Trace3	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,345 contacts →
	Indirect evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 29, 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: operational technology consulting firms. 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 operational technology consulting firms.
Partial evidence: Its own public description names part of operational technology consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name operational technology consulting firms. 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 38,116 operational technology consulting firms worldwide

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Operational technology consulting firms worldwide at a glance

As of Sep 29, 2026

28.1%Verified-email coverage

14.8Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

22,806

11-50

10,740

51-200

3,307

201-500

705

501-1,000

240

1,001-5,000

175

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 operational technology consulting firms, 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 operational technology consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “operational technology consulting firms”. 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 operational technology consulting firms), 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 operational technology consulting firms, 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, 158,824 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 29, 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.

Operational technology consulting firms by location

200 lists · largest first

Every Operational technology consulting firms 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 operational technology consulting firms, 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 operational technology consulting firms are there worldwide?

RevenueBase identified 38,116 operational technology consulting firms 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?

Protiviti, headquartered in Menlo Park, tops this list with the largest team on record.

Which country has the most operational technology consulting firms?

The United States leads with 7,859 companies, followed by Brazil (2,345) and India (2,004). Every operational technology consulting firms list by country and city is linked on this page.

Which city has the most operational technology consulting firms?

Sao Paulo leads with 568 headquartered companies, followed by London (523) and Paris (477).

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 158,824 verified decision-maker contacts tracked across these 38,116 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 29, 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.