Company lists · Data refreshed November 2026

Top 25 IT infrastructure and security companies worldwide

Name: IT infrastructure and security companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 70,370 companies tracked

RevenueBase identified 70,370 company matches for IT infrastructure and security companies worldwide as of November 2026 and tracks 2,049,545 professional contacts across them, including 593,988 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for IT infrastructure and security companies worldwide, 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 November 6, 2026. Country and city lists for IT infrastructure and security companies follow the table.

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 Nov 6, 2026 How this list was built

70,370Companies

2,049,545Contacts tracked

593,988Verified emails

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The 25 largest IT infrastructure and security companies worldwide

Ranked by team size

Top 25 of 70,370 company matches for IT infrastructure and security companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Accenture	Exact match	Dublin 2, United KingdomHQ recorded Nov 6, 2026	10001+	590,896 contacts →
	Exact match “Accenture helps the world’s leading enterprises reinvent by building their digital core and unleashing the power of AI to create value at speed for organizations across industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	DXC Technology	Exact match	Ashburn, VA, United StatesHQ recorded Nov 6, 2026	10001+	86,844 contacts →
	Exact match “DXC Technology helps global companies run their mission-critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Kyndryl	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	10001+	47,955 contacts →
	Exact match “We have the world’s best talent that design, run, and manage the most advanced and reliable technology infrastructure each day.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Orange Business	Exact match	Paris, FranceHQ recorded Nov 6, 2026	10001+	25,625 contacts →
	Exact match “In a world that never stands still, possibility is everywhere.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Palo Alto Networks	Exact match	Santa Clara, United StatesHQ recorded Nov 6, 2026	10001+	21,906 contacts →
	Exact match “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Vmware	Exact match	Palo Alto, CA, United StatesHQ recorded Nov 6, 2026	10001+	16,819 contacts →
	Exact match “Broadcom's VMware software manages cloud complexity so customers can modernize infrastructure, accelerate app development, and protect workloads, wherever these reside.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Nov 6, 2026	10001+	15,414 contacts →
	Exact match “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Guidehouse	Exact match	Mclean, IL, United StatesHQ recorded Nov 6, 2026	10001+	13,603 contacts →
	Exact match “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Private Sector	Exact match	United StatesHQ recorded Nov 6, 2026	n/a	13,149 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Apex Systems	Exact match	Glen Allen, United StatesHQ recorded Nov 6, 2026	1,001-5,000	12,788 contacts →
	Exact match “Everforth Apex Systems, part of the Everforth ™ Network, is a leading global technology services company specializing in customizable industry-specific solutions that turns…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Comcast Business	Exact match	Philadelphia, PA, United StatesHQ recorded Nov 6, 2026	10001+	8,837 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	ELM Company	Exact match	Riyadh, Saudi ArabiaHQ recorded Nov 6, 2026	1,001-5,000	7,577 contacts →
	Exact match “Elm is the leading provider of innovative secure services & solutions to both public and private sectors in Saudi Arabia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Sify Technologies Limited	Exact match	Chennai, IndiaHQ recorded Nov 6, 2026	1,001-5,000	7,202 contacts →
	Exact match “A Fortune India 500 company, Sify Technologies is India’s most comprehensive ICT service & solution provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	SHI International Corp	Exact match	Somerset, United StatesHQ recorded Nov 6, 2026	5,001-10,000	7,151 contacts →
	Exact match “Think of SHI as your personal technology concierge.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Datacom	Exact match	Auckland, New ZealandHQ recorded Nov 6, 2026	5,001-10,000	6,268 contacts →
	Exact match “Datacom is a technology partner and solutions provider combining deep local expertise with global capability, working across data, cloud, cyber security, digital engineering and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	SCC	Exact match	Birmingham, FranceHQ recorded Nov 6, 2026	5,001-10,000	5,859 contacts →
	Exact match “SCC unleashes the potential of IT for global businesses, as one of Europe’s largest independent IT groups.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Sophos	Exact match	Abingdon, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	5,283 contacts →
	Exact match “Sophos, a global cybersecurity leader, defends more than organizations worldwide with Sophos Fusion, the industry's first and most complete AI-native cybersecurity defense system…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Amaris Consulting Part Of Mantu	Exact match	Chêne-bourg, SwitzerlandHQ recorded Nov 6, 2026	5,001-10,000	5,223 contacts →
	Exact match “Amaris Consulting is an independent technology consulting firm providing guidance and solutions to businesses.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Team Computers	Exact match	New Delhi, IndiaHQ recorded Nov 6, 2026	1,001-5,000	4,945 contacts →
	Exact match “Our story began in 1987, when our founder, Ranjan Chopra, an alumnus of IIT Kanpur, set out to bridge the gap between business needs and IT solutions in India.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	NTT	Exact match	Chiyoda-ku, JapanHQ recorded Nov 6, 2026	10001+	4,872 contacts →
	Exact match “NTT is a leading global technology innovator, providing a broad range of services to both consumers and businesses.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Rubrik	Exact match	Palo Alto, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,857 contacts →
	Exact match “Rubrik (NYSE: RBRK), the Security and AI company, operates at the intersection of data protection, cyber resilience and enterprise AI acceleration.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Cegeka	Exact match	Hasselt, BelgiumHQ recorded Nov 6, 2026	5,001-10,000	4,771 contacts →
	Exact match “The digital world moves fast.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	CMS IT Services	Exact match	Bangalore, IndiaHQ recorded Nov 6, 2026	5,001-10,000	4,449 contacts →
	Exact match “CMS IT is a leading India-focused, tier-1 preferred IT provider with a legacy of four decades.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Presidio	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,274 contacts →
	Exact match “At Presidio, speed and quality meet technology and innovation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Black BOX	Exact match	Plano, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,014 contacts →
	Exact match “Black Box is a global leader in digital infrastructure solutions, delivering network and system integration, managed services, and technology products to Fortune 100 and top…” Recorded in the RevenueBase company graph · Nov 6, 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 “IT infrastructure and security companies”. 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 70,370 IT infrastructure and security companies worldwide

See the full list, filter by size, metro and specialty, and access 593,988 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT infrastructure and security companies worldwide at a glance

As of Nov 6, 2026

29.0%Verified-email coverage

29.1Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

36,375

11-50

24,232

51-200

6,687

201-500

1,541

501-1,000

496

1,001-5,000

389

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for IT infrastructure and security companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “IT infrastructure and security companies” 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. 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 593,988 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 November 6, 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.

IT infrastructure and security companies by location

408 lists · largest first

Every IT infrastructure and security companies 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 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 “IT infrastructure and security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT infrastructure and security companies are there worldwide?

RevenueBase identified 70,370 company matches for IT infrastructure and security companies worldwide as of November 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?

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

Which country has the most IT infrastructure and security companies?

The United States leads with 16,339 companies, followed by India (6,287) and the United Kingdom (3,589). Every IT infrastructure and security companies list by country and city is linked on this page.

Which city has the most IT infrastructure and security companies?

London leads with 1134 company records, followed by Sao Paulo (835) and Dubai (759).

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 593,988 professional contacts with verified work emails tracked across these 70,370 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 November 6, 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.