Company lists · Data refreshed September 2026

Top 25 Communication system integrators worldwide

Name: Communication system integrators worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 18,527 companies tracked

RevenueBase identified 18,527 communication system integrators worldwide as of September 2026 and tracks 377,386 professional contacts across them, including 96,637 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers communication system integrators 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 19, 2026. Country and city lists for communication system integrators 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 19, 2026 86% judged on-target in blind review

18,527Companies

377,386Contacts tracked

96,637Verified emails

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The 25 largest communication system integrators worldwide

Ranked by team size

Top 25 of 18,527 communication system integrators worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to communication system integrators: 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	Telefónica	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	10001+	54,718 contacts →
	Indirect evidence “Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers.” Source: RevenueBase Database · checked Sep 19, 2026
2	Convergint	Strong evidence	Hoffman Estates, IL, United StatesHQ checked Sep 19, 2026	10001+	5,707 contacts →
	Strong evidence “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: RevenueBase Database · checked Sep 19, 2026
3	Airtel Business	Partial evidence	Gurgaon, IndiaHQ checked Sep 19, 2026	10001+	2,760 contacts →
	Partial evidence “The B2B arm of Bharti Airtel, we are India's leading provider of secure and reliable connectivity, technology, and communications solutions.” Source: RevenueBase Database · checked Sep 19, 2026
4	Automated Systems Design, INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 19, 2026	n/a	2,678 contacts →
	Partial evidence “Since 1987, Automated Systems Design, Inc.(ASD®) a five-time Inc.” Source: RevenueBase Database · checked Sep 19, 2026
5	Procisa DO Brasil	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	1,001-5,000	2,538 contacts →
	Indirect evidence “Prazer, somos a Procisa do Brasil!” Source: RevenueBase Database · checked Sep 19, 2026
6	Spread Tecnologia	Partial evidence	São Paulo, BrazilHQ checked Sep 19, 2026	1,001-5,000	2,521 contacts →
	Partial evidence “With over 30 years of experience in Information and Communication Technology market, the Spread has extensive experience and expertise in the field and has the challenge of…” Source: RevenueBase Database · checked Sep 19, 2026
7	SVA System Vertrieb Alexander Gmbh	Strong evidence	Wiesbaden, GermanyHQ checked Sep 19, 2026	1,001-5,000	2,452 contacts →
	Strong evidence “Imprint: SVA is one of the leading system integrators in Germany.” Source: RevenueBase Database · checked Sep 19, 2026
8	Sirti S.P.A	Partial evidence	Sesto San Giovanni (mi), ItalyHQ checked Sep 19, 2026	1,001-5,000	2,332 contacts →
	Partial evidence “Sirti is Italy's leading technology company in the design and production of network infrastructures and telecoms system integration.” Source: RevenueBase Database · checked Sep 19, 2026
9	Granite Telecommunications	Indirect evidence	Quincy, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,270 contacts →
	Indirect evidence “Granite is a dynamic and rapidly growing company serving the exciting and demanding Telecommunications market.” Source: RevenueBase Database · checked Sep 19, 2026
10	Unifique	Indirect evidence	Timbó, BrazilHQ checked Sep 19, 2026	1,001-5,000	1,807 contacts →
	Indirect evidence “Somos uma empresa de telecomunicações com 28 anos de atuação.” Source: RevenueBase Database · checked Sep 19, 2026
11	IES Communications	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,800 contacts →
	Partial evidence “IES Communications a division of IES (NASDAQ: IESC) provides each client with a team of highly qualified dedicated professionals that deliver superior quality and cost effective…” Source: RevenueBase Database · checked Sep 19, 2026
12	Consort Group	Partial evidence	Paris, FranceHQ checked Sep 19, 2026	1,001-5,000	1,704 contacts →
	Partial evidence “Acteur de référence des systèmes d’information augmentés par l’intégration stratégique de la data, Consort Group accompagne les entreprises pour leur permettre de valoriser ce…” Source: RevenueBase Database · checked Sep 19, 2026
13	Telecon	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 19, 2026	1,001-5,000	1,573 contacts →
	Indirect evidence “From a regional telecom networks builder in 1967 in Quebec (Canada), Telecon has grown into a world-class industry-leading telecom networks design, infrastructure and connectivity…” Source: RevenueBase Database · checked Sep 19, 2026
14	GAMMA	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,568 contacts →
	Partial evidence “Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Source: RevenueBase Database · checked Sep 19, 2026
15	Tulip Telecom	Partial evidence	New Delhi, IndiaHQ checked Sep 19, 2026	1,001-5,000	1,481 contacts →
	Partial evidence “Tulip Telecom Ltd.(BSE: 532691/NSE: TULIP) is India’s leading Enterprise Communications Service provider.” Source: RevenueBase Database · checked Sep 19, 2026
16	Aerial Telecom Solutions	Strong evidence	Mohali, IndiaHQ checked Sep 19, 2026	5,001-10,000	1,388 contacts →
	Strong evidence “Aerial Telecom Solutions Private Limited is a global systems integrator and technology partner, driving next-generation connectivity and digital transformation across diverse…” Source: RevenueBase Database · checked Sep 19, 2026
17	Italtel	Partial evidence	Milan, GermanyHQ checked Sep 19, 2026	1,001-5,000	1,279 contacts →
	Partial evidence “We help our customers to choose the most suitable solutions for the characteristics of their business, to develop the traditional communication technologies they already have in…” Source: RevenueBase Database · checked Sep 19, 2026
18	Rovisys	Strong evidence	Aurora, OH, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,159 contacts →
	Strong evidence “As one of the world's largest independent systems integrators, RoviSys delivers comprehensive automation, digital transformation, manufacturing execution (MES), Industrial AI…” Source: RevenueBase Database · checked Sep 19, 2026
19	Integra	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 19, 2026	501-1,000	1,133 contacts →
	Indirect evidence “Integra is Allstream.” Source: RevenueBase Database · checked Sep 19, 2026
20	Bandwidth INC	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,128 contacts →
	Partial evidence “Bandwidth is the universal communications platform that simplifies how businesses deliver integrated global experiences.” Source: RevenueBase Database · checked Sep 19, 2026
21	CCI Systems	Partial evidence	Iron Mountain, MI, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,077 contacts →
	Partial evidence “CCI Systems is an employee-owned solution provider specializing in telecommunications, comprehensive network assessments, industry-leading engineering, drafting and design…” Source: RevenueBase Database · checked Sep 19, 2026
22	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
23	E2 Optics	Partial evidence	Englewood, CO, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,001 contacts →
	Partial evidence “E2 Optics is an award-winning, woman-owned, low voltage IT solutions integrator.” Source: RevenueBase Database · checked Sep 19, 2026
24	Bynet Data Communications	Strong evidence	Tel Aviv, IsraelHQ checked Sep 19, 2026	501-1,000	994 contacts →
	Strong evidence “As Israel's leading systems integrator, Bynet Data Communications offers comprehensive solutions and services that provide complete answers to organizations’ ICT and telecom needs.” Source: RevenueBase Database · checked Sep 19, 2026
25	KGPCO	Partial evidence	Faribault, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	974 contacts →
	Partial evidence “KGPCo is a key strategic partner to the world’s leading communication and technology companies creating the next generation of networks.” Source: RevenueBase Database · checked Sep 19, 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: communication system integrators. 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 communication system integrators.
Partial evidence: Its own public description names part of communication system integrators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name communication system integrators. 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 18,527 communication system integrators worldwide

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Communication system integrators worldwide at a glance

As of Sep 19, 2026

25.6%Verified-email coverage

20.4Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Sao Paulo

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

7,500

11-50

7,663

51-200

2,451

201-500

521

501-1,000

170

1,001-5,000

112

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 communication system integrators, 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 communication system integrators are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “communication system integrators”. 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 communication system integrators), 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 communication system integrators, 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, 96,637 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 19, 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.

Communication system integrators by location

85 lists · largest first

Every Communication system integrators 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 communication system integrators, 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 communication system integrators are there worldwide?

RevenueBase identified 18,527 communication system integrators 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?

Telefónica, headquartered in Madrid, tops this list with the largest team on record.

Which country has the most communication system integrators?

The United States leads with 4,236 companies, followed by the United Kingdom (1,094) and India (857). Every communication system integrators list by country and city is linked on this page.

Which city has the most communication system integrators?

Sao Paulo leads with 222 headquartered companies, followed by Dubai (180) and London (155).

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 96,637 verified decision-maker contacts tracked across these 18,527 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 19, 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.