Company lists · Data refreshed September 2026

Top 25 Managed voip service providers based in the United States

Name: Managed voip service providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,141 companies tracked

RevenueBase identified 1,141 managed voip service providers headquartered in the United States as of September 2026 and tracks 12,631 professional contacts across them, including 4,272 with verified work emails. New York is the largest hub.

This list covers managed voip service providers headquartered in the United States, 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 20, 2026.

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 20, 2026 86% judged on-target in blind review

1,141Companies

12,631Contacts tracked

4,272Verified emails

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The 25 largest managed voip service providers based in the United States

Ranked by team size

Top 25 of 1,141 managed voip service providers based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to managed voip service providers: 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	GOTO	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,320 contacts →
	Indirect evidence “As the leader in cloud communications and IT, GoTo addresses real-world challenges with practical innovations and a customer-first mindset.” Source: RevenueBase Database · checked Sep 20, 2026
2	Ooma, INC	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 20, 2026	501-1,000	606 contacts →
	Indirect evidence “Ooma delivers phone, messaging, video and advanced communications services that are easy to implement and provide great value.” Source: RevenueBase Database · checked Sep 20, 2026
3	Spectrumvoip	Indirect evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	201-500	435 contacts →
	Indirect evidence “Family owned and proudly based in Plano, Texas, SpectrumVoIP has kept businesses talking and thriving since 2007.” Source: RevenueBase Database · checked Sep 20, 2026
4	Fortis	Strong evidence	Sacramento, CA, United StatesHQ checked Sep 20, 2026	n/a	170 contacts →
	Strong evidence “Fortis is a Sacramento Area provider of managed IT services, hosted VoIP, and high speed, redundant internet.” Source: RevenueBase Database · checked Sep 20, 2026
5	IT Voice	Strong evidence	Birmingham, AL, United StatesHQ checked Sep 20, 2026	51-200	154 contacts →
	Strong evidence “IT Voice specializes in Managed IT and VoIP solutions.” Source: RevenueBase Database · checked Sep 20, 2026
6	Transcom Telecommunications	Indirect evidence	Signal Hill, CA, United StatesHQ checked Sep 20, 2026	11-50	127 contacts →
	Indirect evidence “Transcom Telecommunications (formerly called "Transcom Services") is a Veteran Owned Business founded in 1986 on 3 core ideas.” Source: RevenueBase Database · checked Sep 20, 2026
7	Estech Systems, Inc. ESI	Indirect evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	51-200	121 contacts →
	Indirect evidence “Founded in 1987, Estech Systems (ESI), a Crexendo® company, delivers high-performance phone systems designed for growing businesses.” Source: RevenueBase Database · checked Sep 20, 2026
8	KOL Telecom Services LLC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 20, 2026	11-50	112 contacts →
	Partial evidence “KOL Telecom is the leading innovator of small business Voice over IP (VoIP) Phone services.” Source: RevenueBase Database · checked Sep 20, 2026
9	Voip Supply	Partial evidence	Amherst, NY, United StatesHQ checked Sep 20, 2026	11-50	110 contacts →
	Partial evidence “We Solve Problems and Create Solutions with VoIP.” Source: RevenueBase Database · checked Sep 20, 2026
10	Voip Networks	Partial evidence	Cherry Hill, NJ, United StatesHQ checked Sep 20, 2026	51-200	83 contacts →
	Partial evidence “Powering Your Companies Voice & More Utilizing the latest technologies in voice such as VoIP (Voice-Over-Internet-Protocol) and other networking technologies, we can provide your…” Source: RevenueBase Database · checked Sep 20, 2026
11	PC Telcom	Indirect evidence	Holyoke, CO, United StatesHQ checked Sep 20, 2026	11-50	77 contacts →
	Indirect evidence “Full Service Telecommunications Provider.” Source: RevenueBase Database · checked Sep 20, 2026
12	Telecomp	Strong evidence	Rogers, AR, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Strong evidence “TeleComp is a full-service technology company offering Enterprise VoIP phone systems, Fiber Bandwidth, Cybersecurity/Compliance and Managed Services.” Source: RevenueBase Database · checked Sep 20, 2026
13	Allied Communications	Indirect evidence	West Haven, CT, United StatesHQ checked Sep 20, 2026	11-50	69 contacts →
	Indirect evidence “We Help Businesses Communicate and Collaborate Freely" Allied Communications, is an established, customer-driven, results-oriented data/telecommunications company, offering a rare…” Source: RevenueBase Database · checked Sep 20, 2026
14	Unified Global Solutions LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	11-50	68 contacts →
	Indirect evidence “Business Class Phone Systems & Service with support & functionality to exceed your communication needs.” Source: RevenueBase Database · checked Sep 20, 2026
15	Interglobe Communications	Indirect evidence	Staten Island, United StatesHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “Headquartered in New York City, InterGlobe Communications is a one stop network service provider.” Source: RevenueBase Database · checked Sep 20, 2026
16	Verve Cloud	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “Verve is a client-focused nationwide provider of Cloud-Hosted Voice and Internet solutions for the SMB market.” Source: RevenueBase Database · checked Sep 20, 2026
17	Lightspeed Voice	Partial evidence	North Venice, FL, United StatesHQ checked Sep 20, 2026	51-200	63 contacts →
	Partial evidence “Lightspeed Voice is an AI-powered VoIP solutions provider at the forefront of transforming business communications.” Source: RevenueBase Database · checked Sep 20, 2026
18	Clarity Voice	Indirect evidence	Southfield, MI, United StatesHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “It’s no secret that staying connected and accessible is absolutely crucial in today’s business environment.” Source: RevenueBase Database · checked Sep 20, 2026
19	Vaspian	Indirect evidence	Buffalo, NY, United StatesHQ checked Sep 20, 2026	11-50	55 contacts →
	Indirect evidence “We are very proud to say that Vaspian is the largest Hosted Telephone Provider in Upstate NY.” Source: RevenueBase Database · checked Sep 20, 2026
20	Oit, LLC Oitvoip	Indirect evidence	Miami Lakes, FL, United StatesHQ checked Sep 20, 2026	11-50	54 contacts →
	Indirect evidence “OIT, LLC is a service-first organization that specializes in telecommunications and distributed networking.” Source: RevenueBase Database · checked Sep 20, 2026
21	Monmouth Telecom	Indirect evidence	Eatontown, NJ, United StatesHQ checked Sep 20, 2026	51-200	53 contacts →
	Indirect evidence “Established in 1995 as a premier Internet Service Provider in New Jersey, Monmouth Telecom has evolved into a comprehensive provider offering cutting-edge and cost-effective…” Source: RevenueBase Database · checked Sep 20, 2026
22	Ipro Media, INC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	11-50	51 contacts →
	Indirect evidence “Founded in 2004, IPRO is headquartered in Dallas, Texas, with additional branches in Austin, San Antonio, Houston, and our newest office in Pittsburgh, PA.” Source: RevenueBase Database · checked Sep 20, 2026
23	Ics- It, Voice & Video	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 20, 2026	51-200	50 contacts →
	Indirect evidence “Innovative Communication Systems is a full service, family owned, business IT services provider in Austin, Houston, and San Antonio that has been leading the way since 1981.” Source: RevenueBase Database · checked Sep 20, 2026
24	Telesphere NOW Vonage	Indirect evidence	Holmdel, NJ, United StatesHQ checked Sep 20, 2026	1,001-5,000	50 contacts →
	Indirect evidence “Vonage Business is the leading pure-play provider of unified cloud communications.” Source: RevenueBase Database · checked Sep 20, 2026
25	Teamsos Special Order Systems	Indirect evidence	Loomis, CA, United StatesHQ checked Sep 20, 2026	51-200	46 contacts →
	Indirect evidence “TEAMSOS provides innovative technology solutions that advance businesses and the lives of people everywhere.” Source: RevenueBase Database · checked Sep 20, 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: managed voip service providers. 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 managed voip service providers.
Partial evidence: Its own public description names part of managed voip service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name managed voip service providers. 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 1,141 managed voip service providers based in the United States

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Managed voip service providers based in the United States at a glance

As of Sep 20, 2026

33.8%Verified-email coverage

11.1Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

545

11-50

485

51-200

201-500

501-1,000

1,001-5,000

10001+

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 1,141 companies.

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 managed voip service providers, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “managed voip service providers”. 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 managed voip service providers), 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 managed voip service providers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 4,272 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 20, 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.

Managed voip service providers by metro

Managed voip service providers in New York43

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 managed voip service providers, 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 managed voip service providers are there based in the United States?

RevenueBase identified 1,141 managed voip service providers headquartered in the United States 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?

GOTO, headquartered in Boston, tops this list with the largest team on record.

Which city has the most managed voip service providers?

New York leads with 43 headquartered companies, followed by Dallas (24) and Houston (21).

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 4,272 verified decision-maker contacts tracked across these 1,141 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 20, 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.