Company lists · Data refreshed September 2026

Top 25 Communication and collaboration platforms based in the United States

RevenueBase identified 531 company matches for communication and collaboration platforms associated with the United States as of September 2026 and tracks 35,818 professional contacts across them, including 7,624 with verified work emails. San Francisco is the largest hub.

This list covers company matches for communication and collaboration platforms 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 27, 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 27, 2026 How this list was built
531Companies
35,818Contacts tracked
7,624Verified emails
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The 25 largest communication and collaboration platforms based in the United States

Ranked by team size
Top 25 of 531 company matches for communication and collaboration platforms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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 27, 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 27, 2026 · View company records in RevenueBase
2Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
3Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 20261,001-5,0002,619 contacts →

Exact match

“Slack is on a mission to make people's working lives simpler, more pleasant and more productive.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchSunnyvale, CA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
5Exact matchRaleigh, NC, United StatesHQ recorded Sep 27, 20261,001-5,0001,103 contacts →

Exact match

“There is a better way to work.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchNY, United StatesHQ recorded Sep 27, 2026n/a827 contacts →

Exact match

“Café helps enterprises drive collaboration, engagement, and cohesion through real-world interactions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026501-1,000471 contacts →

Exact match

“Seeing is how go-to-market teams turn alignment into an ongoing way of working.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchRedmond, WA, United StatesHQ recorded Sep 27, 202610001+423 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 2026501-1,000264 contacts →

Exact match

“Please be advised that BlueJeans by Verizon is being sunset, concluding in the first half of 2024.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchPortland, OR, United StatesHQ recorded Sep 27, 202651-200256 contacts →

Exact match

“InFocus makes connecting people and ideas easy, reliable and affordable.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchSouth Plainfield, NJ, United StatesHQ recorded Sep 27, 202651-200212 contacts →

Exact match

“Communication is the backbone of every business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchAlexandria, VA, United StatesHQ recorded Sep 27, 2026501-1,000198 contacts →

Exact match

“Your all-in-one workspace for growth.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchTempe, AZ, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
14Exact matchNew York, NY, United StatesHQ recorded Sep 27, 2026501-1,000168 contacts →

Exact match

“InVision is the visual collaboration platform powering the world’s smartest companies.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchCharlotte, NC, United StatesHQ recorded Sep 27, 2026201-500165 contacts →

Exact match

“Waveguide was founded in 1996 and has been at the leading edge of advancements in communication technology services ever since – because we understand today’s communication…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchAustin, TX, United StatesHQ recorded Sep 27, 2026501-1,000164 contacts →

Exact match

“Jive is the leading provider of modern communication and collaboration solutions for business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchPalo Alto, CA, United StatesHQ recorded Sep 27, 202651-200152 contacts →

Exact match

“Mattermost is the leading collaboration platform for mission-critical work.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchSouth Jordan, UT, United StatesHQ recorded Sep 27, 202651-200141 contacts →

Exact match

“Smash is solution that integrates the latest innovative technological components into accessible, all-inclusive solutions that bridge each aspect of professional and personal…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026201-500130 contacts →

Exact match

“Coda is now Superhuman Docs!”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchBoston, MA, United StatesHQ recorded Sep 27, 2026501-1,000103 contacts →

Exact match

“Fuze is a global cloud communications and collaboration software platform for the enterprise that was acquired by 8x8.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchNew York, NY, United StatesHQ recorded Sep 27, 202611-5093 contacts →

Exact match

“Nifty helps teams' simplify their workflow by consolidating team communication, project management, and client collaboration into one easy, fun, and efficient tool.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchCambridge, United StatesHQ recorded Sep 27, 20261,001-5,00092 contacts →

Exact match

“Lotus Development Worldwide”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchDenver, CO, United StatesHQ recorded Sep 27, 202651-20089 contacts →

Exact match

“Finishing your product shouldn’t be harder than building it.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchRedwood City, CA, United StatesHQ recorded Sep 27, 2026201-50088 contacts →

Exact match

“Since the dawn of the Web, BroadVision has been a global leader in providing organizations with the rules, tools and infrastructure for doing business on the Web.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchArlington, VA, United StatesHQ recorded Sep 27, 202651-20078 contacts →

Exact match

“Axios HQ is the first internal communications management platform to equip organizations with the tools, data, and best practices to be world-class communicators.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 531 communication and collaboration platforms based in the United States

See the full list, filter by size, metro and specialty, and access 7,624 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Communication and collaboration platforms based in the United States at a glance

As of Sep 27, 2026
21.3%Verified-email coverage
67.5Average contacts per company
11-50Median size (employees)
11.5%Largest-city concentration · San Francisco
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
227
11-50
201
51-200
62
201-500
13
501-1,000
8
1,001-5,000
8
5,001-10,000
3
10001+
7

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 531 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 “communication and collaboration platforms” 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 7,624 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 27, 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 “communication and collaboration platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many communication and collaboration platforms are there based in the United States?

RevenueBase identified 531 company matches for communication and collaboration platforms 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 communication and collaboration platforms?

San Francisco leads with 61 company records, followed by New York (39) and Los Angeles (15).

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 7,624 professional contacts with verified work emails tracked across these 531 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 27, 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.