Company lists · Data refreshed September 2026

Top 25 Operations research consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 22,225 companies tracked

RevenueBase identified 22,225 operations research consulting firms worldwide as of September 2026 and tracks 167,525 professional contacts across them, including 41,514 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers operations research 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 operations research 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

22,225Companies

167,525Contacts tracked

41,514Verified emails

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The 25 largest operations research consulting firms worldwide

Ranked by team size

Top 25 of 22,225 operations research 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 operations research 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	Kearney	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	5,001-10,000	6,978 contacts →
	Partial evidence “As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.” Source: RevenueBase Database · checked Sep 29, 2026
2	Propia AB	Partial evidence	Norrköping, SwedenHQ checked Sep 29, 2026	n/a	2,448 contacts →
	Partial evidence “Propia is a Consultant Company offering competence and proven methodology within Operational Excellence.” Source: RevenueBase Database · checked Sep 29, 2026
3	Abylsen	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	1,001-5,000	1,577 contacts →
	Indirect evidence “In a world that too often follows currents, Abylsen has been opening itself up to new directions.” Source: RevenueBase Database · checked Sep 29, 2026
4	D-Fine	Indirect evidence	Frankfurt, GermanyHQ checked Sep 29, 2026	1,001-5,000	1,472 contacts →
	Indirect evidence “Imagine the power of physicists, mathematicians and computer scientists working as part of a European company with over 20 years of service excellence focused on data science…” Source: RevenueBase Database · checked Sep 29, 2026
5	Ardurra	Indirect evidence	Miami, FL, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,260 contacts →
	Indirect evidence “Expertly balancing experience and innovation to deliver unique solutions to public and private clients.” Source: RevenueBase Database · checked Sep 29, 2026
6	W3global	Strong evidence	Frisco, TX, United StatesHQ checked Sep 29, 2026	501-1,000	1,149 contacts →
	Strong evidence “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Source: RevenueBase Database · checked Sep 29, 2026
7	Falconi	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 29, 2026	501-1,000	990 contacts →
	Indirect evidence “A Falconi é a maior consultoria brasileira de gestão empresarial.” Source: RevenueBase Database · checked Sep 29, 2026
8	Argon & CO	Partial evidence	Levallois-perret, FranceHQ checked Sep 29, 2026	1,001-5,000	858 contacts →
	Partial evidence “Argon & Co is a global management consultancy that specialises in operations strategy and transformation.” Source: RevenueBase Database · checked Sep 29, 2026
9	Inform Gmbh	Indirect evidence	Aachen, GermanyHQ checked Sep 29, 2026	1,001-5,000	803 contacts →
	Indirect evidence “INFORM develops software solutions that enable better decision-making in industrial and logistics processes as well as in the financial sector, from risk management and fraud…” Source: RevenueBase Database · checked Sep 29, 2026
10	The Vertex Companies LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	501-1,000	765 contacts →
	Partial evidence “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Source: RevenueBase Database · checked Sep 29, 2026
11	CAI	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 29, 2026	501-1,000	763 contacts →
	Partial evidence “At CAI, we are a professional services firm designed to accelerate operational readiness and excellence in critical environments.” Source: RevenueBase Database · checked Sep 29, 2026
12	ERG	Partial evidence	Concord, MA, United StatesHQ checked Sep 29, 2026	501-1,000	663 contacts →
	Partial evidence “ERG is a multidisciplinary consulting firm offering a broad range of professional services.” Source: RevenueBase Database · checked Sep 29, 2026
13	Logistics Executive Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 29, 2026	n/a	647 contacts →
	Indirect evidence “Welcome to Logistics Executive Group - The hub of your global supply chain.” Source: RevenueBase Database · checked Sep 29, 2026
14	Analytix Solutions	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 29, 2026	501-1,000	640 contacts →
	Indirect evidence “Welcome to Analytix Solutions!” Source: RevenueBase Database · checked Sep 29, 2026
15	SEI	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 29, 2026	501-1,000	618 contacts →
	Partial evidence “SEI is a management consulting firm delivering fresh perspectives and reliable results.” Source: RevenueBase Database · checked Sep 29, 2026
16	Life Cycle Engineering	Partial evidence	Charleston, SC, United StatesHQ checked Sep 29, 2026	501-1,000	539 contacts →
	Partial evidence “Life Cycle Engineering (LCE) provides consulting, engineering, information technology and education solutions that deliver lasting results for private industry, public entities…” Source: RevenueBase Database · checked Sep 29, 2026
17	Allied Market Research	Strong evidence	Wilmington, DE, United StatesHQ checked Sep 29, 2026	501-1,000	508 contacts →
	Strong evidence “Driven by innovation and value addition approach, Allied Market Research is instrumental in market research and business consulting across various industry verticals since its…” Source: RevenueBase Database · checked Sep 29, 2026
18	Thoucentric	Partial evidence	Bangalore, IndiaHQ checked Sep 29, 2026	501-1,000	476 contacts →
	Partial evidence “Thoucentric is a niche management consulting company that uses relevant digital and functional domain expertise to solve problems in Supply Chain, Sales & Distribution, and…” Source: RevenueBase Database · checked Sep 29, 2026
19	Demarco	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 29, 2026	201-500	452 contacts →
	Indirect evidence “Since 2004, we have helped companies solve their challenges in People, Management, Security and Trade Union Relations, delivering world-class results.” Source: RevenueBase Database · checked Sep 29, 2026
20	Resultant	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 29, 2026	201-500	431 contacts →
	Indirect evidence “We are a passionate team of engineers, mathematicians, data analysts, project managers, and business consultants.” Source: RevenueBase Database · checked Sep 29, 2026
21	H.H. Angus & Associates LTD	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 29, 2026	201-500	424 contacts →
	Indirect evidence “HH Angus Corporate Overview HH Angus and Associates Limited was founded in 1919 and today is one of Canada’s larger private engineering firms.” Source: RevenueBase Database · checked Sep 29, 2026
22	Kaiser Associates	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	397 contacts →
	Partial evidence “Kaiser Associates was founded in 1981 with a simple yet powerful mission: to help executives make more informed strategic and operational decisions by incorporating external…” Source: RevenueBase Database · checked Sep 29, 2026
23	3eriza	Indirect evidence	Surquillo, PeruHQ checked Sep 29, 2026	1,001-5,000	391 contacts →
	Indirect evidence “3eriza es una consultora especializada en el diseño, implementación y optimización de la provisión de servicios a empresas, brindando soporte en dos frentes: Asesorando a empresas…” Source: RevenueBase Database · checked Sep 29, 2026
24	Stcp Engenharia DE Projetos	Indirect evidence	Curitiba, BrazilHQ checked Sep 29, 2026	201-500	370 contacts →
	Indirect evidence “STCP Engenharia de Projetos Ltda é uma das companhias pioneiras no Brasil a integrar em um único centro três áreas relacionadas à projetos do setor florestal.” Source: RevenueBase Database · checked Sep 29, 2026
25	KLB	Strong evidence	Vincennes, MexicoHQ checked Sep 29, 2026	501-1,000	363 contacts →
	Strong evidence “KLB Group is an international consulting firm specializing in operational performance for more than 25 years and bringing together nearly 750 employees worldwide.” 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: operations research 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 operations research consulting firms.
Partial evidence: Its own public description names part of operations research consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name operations research 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 22,225 operations research consulting firms worldwide

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Operations research consulting firms worldwide at a glance

As of Sep 29, 2026

24.8%Verified-email coverage

7.5Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

16,293

11-50

4,608

51-200

966

201-500

198

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 operations research 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 operations research consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “operations research 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 operations research 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 operations research 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, 41,514 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.

Operations research consulting firms by location

109 lists · largest first

Every Operations research 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 operations research 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 operations research consulting firms are there worldwide?

RevenueBase identified 22,225 operations research 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?

Kearney, headquartered in Chicago, tops this list with the largest team on record.

Which country has the most operations research consulting firms?

The United States leads with 5,019 companies, followed by Brazil (1,437) and France (1,108). Every operations research consulting firms list by country and city is linked on this page.

Which city has the most operations research consulting firms?

Sao Paulo leads with 393 headquartered companies, followed by Paris (343) and London (276).

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 41,514 verified decision-maker contacts tracked across these 22,225 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.