Company lists · Data refreshed September 2026
Top 25 Business communication platforms based in the United States
RevenueBase identified 229 business communication platforms headquartered in the United States as of September 2026 and tracks 30,546 professional contacts across them, including 6,571 with verified work emails. San Francisco is the largest hub.
This list covers business communication platforms 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 14, 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.
The 25 largest business communication platforms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 10,510 contacts → | ||||
Indirect evidence “At Avaya, we give our customers the freedom to take their business in the directions that benefit them most.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 9,706 contacts → | ||||
Partial evidence “Bring teams together, reimagine workspaces, engage new audiences, and delight your customers –– all on the Zoom AI-first work platform you know and love.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,619 contacts → | ||||
Indirect evidence “Slack is on a mission to make people's working lives simpler, more pleasant and more productive.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,254 contacts → | ||||
Strong evidence “Intermedia is the cloud communications company that helps over businesses connect better, from wherever, through our AI-powered platform that includes voice, video conferencing…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,103 contacts → | ||||
Indirect evidence “There is a better way to work.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 423 contacts → | ||||
Indirect evidence “The next generation of Skype from Microsoft gives you better ways to chat, call, and plan fun things to do with the people in your life every day.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 401 contacts → | ||||
Partial evidence “Lifesize delivers immersive communication experiences for the global enterprise.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 398 contacts → | ||||
Partial evidence “Founded in 2008 by veteran telecommunication entrepreneurs, Phone.com provides over businesses with comprehensive, flexible, and reliable cloud-based communication and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 264 contacts → | ||||
Indirect evidence “Please be advised that BlueJeans by Verizon is being sunset, concluding in the first half of 2024.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 237 contacts → | ||||
Partial evidence “We solve a critical gap businesses face with employee to client communication, over voice and messaging.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 212 contacts → | ||||
Partial evidence “Communication is the backbone of every business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 175 contacts → | ||||
Strong evidence “Vertical Communications is a leading provider of communications platforms and applications that enable critical business workflows for enterprises across a variety of industries…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 168 contacts → | ||||
Partial evidence “InVision is the visual collaboration platform powering the world’s smartest companies.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 164 contacts → | ||||
Partial evidence “Jive is the leading provider of modern communication and collaboration solutions for business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 146 contacts → | ||||
Indirect evidence “We're bringing video messaging to work and empowering everyone to communicate more effectively, wherever they are.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 103 contacts → | ||||
Strong evidence “Fuze is a global cloud communications and collaboration software platform for the enterprise that was acquired by 8x8.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 77 contacts → | ||||
Strong evidence “Amplispot is the mobile-first company communications platform, used by organizations to increase productivity and empower advocacy by informing and engaging employees with timely…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 72 contacts → | ||||
Partial evidence “Mio is a secure middleware that unlocks cross-platform messaging, file sharing, and meeting initiation for enterprise organizations that use Google Workspace and Microsoft 365…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 48 contacts → | ||||
Indirect evidence “Pumble is a free team alternative to Slack and Microsoft Teams.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 45 contacts → | ||||
Partial evidence “Ringover provides the communications suite that staffing, recruiting and revenue-driven firms require to drive better client & business development outcomes.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 37 contacts → | ||||
Strong evidence “Nevotek provides value-added business communications solutions using the highly programmable, IP-based unified communications platform as a springboard for its innovative product…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 36 contacts → | ||||
Partial evidence “L Squared Digital provides turn-key enterprise corporate communication solutions with a mandate to improve culture and effective communication worldwide.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 36 contacts → | ||||
Strong evidence “HubEngage™ is a unified employee communications, engagement, recognition and instant messaging platform.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 36 contacts → | ||||
Indirect evidence “Agility is the greatest advantage in the modern marketplace.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 27 contacts → | ||||
Partial evidence “Cerkl Broadcast is the premier, forward-thinking employee communications suite.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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: business communication platforms. 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 business communication platforms.
- Partial evidence
- Its own public description names part of business communication platforms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name business communication platforms. 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 229 business communication platforms based in the United States
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Business communication platforms based in the United States at a glance
As of Sep 14, 2026Companies by employee count
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 229 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 business communication platforms, 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 “business communication platforms”. 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 business communication platforms), 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 business communication platforms, 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, 6,571 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 14, 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.
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 business communication platforms, 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 business communication platforms are there based in the United States?
RevenueBase identified 229 business communication platforms 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?
AVAYA, headquartered in Morristown, tops this list with the largest team on record.
Which city has the most business communication platforms?
San Francisco leads with 19 headquartered companies, followed by Miami (9) and New York (8).
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 6,571 verified decision-maker contacts tracked across these 229 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 14, 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.
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