Company lists · Data refreshed September 2026

Top 25 Unified communications services for IT consulting firms based in the United States

RevenueBase identified 1,461 company matches for unified communications services for IT consulting firms associated with the United States as of September 2026 and tracks 46,291 professional contacts across them, including 13,711 with verified work emails. New York is the largest hub.

This list covers company matches for unified communications services for IT consulting firms associated with the United States, 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 September 21, 2026.

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 Sep 21, 2026 How this list was built
1,461Companies
46,291Contacts tracked
13,711Verified emails
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The 25 largest unified communications services for IT consulting firms based in the United States

Ranked by team size
Top 25 of 1,461 company matches for unified communications services for IT consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMorristown, NJ, United StatesHQ recorded Sep 21, 20265,001-10,00010,510 contacts →

Exact match

“At Avaya, we give our customers the freedom to take their business in the directions that benefit them most.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchSan Jose, CA, United StatesHQ recorded Sep 21, 20265,001-10,0009,706 contacts →

Exact match

“Bring teams together, reimagine workspaces, engage new audiences, and delight your customers –– all on the Zoom AI-first work platform you know and love.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchBoston, MA, United StatesHQ recorded Sep 21, 20261,001-5,0002,320 contacts →

Exact match

“As the leader in cloud communications and IT, GoTo addresses real-world challenges with practical innovations and a customer-first mindset.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchSan Jose, CA, United StatesHQ recorded Sep 21, 20261,001-5,0001,787 contacts →

Exact match

“Plantronics and Polycom are now Poly.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchSunnyvale, CA, United StatesHQ recorded Sep 21, 20261,001-5,0001,254 contacts →

Exact match

“Intermedia is the cloud communications company that helps over businesses connect better, from wherever, through our AI-powered platform that includes voice, video conferencing…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchVancouver, WA, United StatesHQ recorded Sep 21, 2026501-1,0001,133 contacts →

Exact match

“Integra is Allstream.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchAtlanta, GA, United StatesHQ recorded Sep 21, 2026501-1,000437 contacts →

Exact match

“We unleash human momentum with collaboration, connectivity, and communications technology.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchAtlanta, GA, United StatesHQ recorded Sep 21, 2026201-500425 contacts →

Exact match

“Fusion Connect, an industry leading cloud communications provider, removes complexity so customers can focus on running their business.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Sep 21, 2026201-500398 contacts →

Exact match

“Founded in 2008 by veteran telecommunication entrepreneurs, Phone.com provides over businesses with comprehensive, flexible, and reliable cloud-based communication and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchTacoma, WA, United StatesHQ recorded Sep 21, 2026201-500366 contacts →

Exact match

“With three decades of expertise in the enterprise communications space, Continuant stands out as a seasoned Managed Services Provider, Systems Integrator, and Technology…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Sep 21, 202651-200263 contacts →

Exact match

“As the nation’s premier distributor of next generation technologies, AVANT has the resources and relationships needed to successfully navigate the ever-changing world of…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchMalvern, PA, United StatesHQ recorded Sep 21, 2026201-500252 contacts →

Exact match

“Since Cenero has been a service focused audio-visual, unified communications and IT solutions provider.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchEagan, MN, United StatesHQ recorded Sep 21, 2026501-1,000252 contacts →

Exact match

“As the leading global integrator of business communication solutions and services since 1993, NACR has been a trusted advisor to more than 40% of the Fortune 100 companies…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchGaithersburg, MD, United StatesHQ recorded Sep 21, 20261,001-5,000252 contacts →

Exact match

“BroadSoft, now part of Cisco, is the leading provider of software and services that enable mobile, fixed-line and cable service providers to offer Unified Communications over…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchSouth Jordan, UT, United StatesHQ recorded Sep 21, 2026201-500226 contacts →

Exact match

“Since 2002, CallTower has been at the forefront of transforming global communication, emerging as a leader in enterprise-class cloud communication, collaboration, and CX solutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchPort Washington, NY, United StatesHQ recorded Sep 21, 202651-200198 contacts →

Exact match

“Advantage mitigates the complexity of navigating a constantly evolving IT landscape.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchBoston, MA, United StatesHQ recorded Sep 21, 2026201-500191 contacts →

Exact match

“Grandstream has been connecting the world since 2002 with unified communications and networking solutions that make communicating more impactful than ever before.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchTempe, AZ, United StatesHQ recorded Sep 21, 2026201-500175 contacts →

Exact match

“Vertical Communications is a leading provider of communications platforms and applications that enable critical business workflows for enterprises across a variety of industries…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchFairlawn, OH, United StatesHQ recorded Sep 21, 202651-200174 contacts →

Exact match

“FirstComm delivers smarter business communications and IT solutions that help organizations connect, collaborate, and scale with confidence.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchSunnyvale, CA, United StatesHQ recorded Sep 21, 202651-200159 contacts →

Exact match

“Zultys is a premier provider of omnichannel, Unified Communications, hosted business phone services and premise-based communications systems.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchSlidell, LA, United StatesHQ recorded Sep 21, 202651-200151 contacts →

Exact match

“In-Telecom offers a full spectrum of solutions such as VoIP phones, access control, unparalleled customer service, IT consulting, and quality workmanship from our experienced…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchTempe, AZ, United StatesHQ recorded Sep 21, 202651-200143 contacts →

Exact match

“Crexendo®, Inc.(NASDAQ:CXDO) is an award-winning premier provider of Unified Communications as a Service (UCaaS), Call Center as a Service (CCaaS), communication platform software…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchChicago, IL, United StatesHQ recorded Sep 21, 202651-200140 contacts →

Exact match

“Access One is a business technology services and communications provider, dedicated to world-class technologies and an award-winning client experience.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Sep 21, 202651-200129 contacts →

Exact match

“We’re a team that lives and breathes technology, and we care deeply about the people we serve.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchSan Jose, CA, United StatesHQ recorded Sep 21, 202651-200126 contacts →

Exact match

“PanTerra is a business-class Unified Cloud Service Provider, seamlessly delivering unified communications, team collaboration, call center, file sync & share, and business…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 1,461 unified communications services for IT consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 13,711 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Unified communications services for IT consulting firms based in the United States at a glance

As of Sep 21, 2026
29.6%Verified-email coverage
31.7Average contacts per company
1-10Median size (employees)
3.2%Largest-city concentration · New York
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
754
11-50
510
51-200
147
201-500
29
501-1,000
7
1,001-5,000
8
5,001-10,000
3
10001+
2

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,461 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “unified communications services for IT consulting firms” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 13,711 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 September 21, 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.

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 “unified communications services for IT consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many unified communications services for IT consulting firms are there based in the United States?

RevenueBase identified 1,461 company matches for unified communications services for IT consulting firms associated with the United States as of September 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?

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

Which city has the most unified communications services for IT consulting firms?

New York leads with 47 company records, followed by Houston (35) and Dallas (27).

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 13,711 professional contacts with verified work emails tracked across these 1,461 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 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 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.