Company lists · Data refreshed November 2026

Top 25 Real time communication platforms based in the United States

RevenueBase identified 293 company matches for real time communication platforms associated with the United States as of November 2026 and tracks 16,173 professional contacts across them, including 5,371 with verified work emails. San Francisco is the largest hub.

This list covers company matches for real time communication 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 November 5, 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 Nov 5, 2026 How this list was built
293Companies
16,173Contacts tracked
5,371Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest real time communication platforms based in the United States

Ranked by team size
Top 25 of 293 company matches for real time communication platforms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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 matchHolmdel, NJ, United StatesHQ recorded Nov 5, 20261,001-5,0003,696 contacts →

Exact match

“We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchMenlo Park, CA, United StatesHQ recorded Nov 5, 2026n/a2,483 contacts →

Exact match

“WhatsApp is a fast, simple and reliable way to talk to anyone in the world.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchSunnyvale, CA, United StatesHQ recorded Nov 5, 20261,001-5,0001,411 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 · Nov 5, 2026 · View company records in RevenueBase
4Exact matchSunnyvale, CA, United StatesHQ recorded Nov 5, 2026501-1,000651 contacts →

Exact match

“Ooma delivers phone, messaging, video and advanced communications services that are easy to implement and provide great value.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchSanta Clara, CA, United StatesHQ recorded Nov 5, 2026501-1,000555 contacts →

Exact match

“Agora (NASDAQ: API) is the global leader in real-time engagement, providing developers with simple, flexible, and powerful APIs to embed real-time conversational AI, voice, video…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchRedmond, WA, United StatesHQ recorded Nov 5, 202610001+468 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 · Nov 5, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Nov 5, 2026201-500433 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 · Nov 5, 2026 · View company records in RevenueBase
8Exact matchChicago, IL, United StatesHQ recorded Nov 5, 2026501-1,000326 contacts →

Exact match

“We've moved pages.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchHerndon, VA, United StatesHQ recorded Nov 5, 202651-200281 contacts →

Exact match

“Ultatel delivers a powerful yet easy-to-use cloud communications suite that scales with your business-combining voice, SMS, chat, video, online fax, and contact center…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchAlpharetta, GA, United StatesHQ recorded Nov 5, 202651-200266 contacts →

Exact match

“We solve a critical gap businesses face with employee to client communication, over voice and messaging.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchSouth Jordan, UT, United StatesHQ recorded Nov 5, 2026201-500258 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 · Nov 5, 2026 · View company records in RevenueBase
12Exact matchGaithersburg, MD, United StatesHQ recorded Nov 5, 20261,001-5,000253 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 · Nov 5, 2026 · View company records in RevenueBase
13Exact matchBoulder, CO, United StatesHQ recorded Nov 5, 202651-200241 contacts →

Exact match

“Stream helps apps build real-time experiences that scale.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchSouth Plainfield, NJ, United StatesHQ recorded Nov 5, 2026201-500212 contacts →

Exact match

“Communication is the backbone of every business.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchPalo Alto, CA, United StatesHQ recorded Nov 5, 2026201-500208 contacts →

Exact match

“Voximplant versatile cloud platform enables business to bring interaction to a different level.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchTroy, MI, United StatesHQ recorded Nov 5, 2026201-500199 contacts →

Exact match

“VoIP Office, founded in 2004, provides cloud-based communications and hosted PBX solutions that combine traditional PBX features with VoIP functionality.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchTempe, AZ, United StatesHQ recorded Nov 5, 2026201-500185 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 · Nov 5, 2026 · View company records in RevenueBase
18Exact matchWilmington, DE, United StatesHQ recorded Nov 5, 202651-200181 contacts →

Exact match

“Rocket.Chat Secure CommsOS® is a communication platform that unifies messaging, voice, video, AI, and mission-critical applications-ensuring uncompromising security, compliance…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchSan Jose, CA, United StatesHQ recorded Nov 5, 20265,001-10,000167 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchMinneapolis, MN, United StatesHQ recorded Nov 5, 202651-200141 contacts →

Exact match

“Kipsu is pioneering a software-based solution designed to revolutionize how service-driven brands interact with consumers.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchLas Vegas, NV, United StatesHQ recorded Nov 5, 2026201-500140 contacts →

Exact match

“tawk.to makes it easy for over six million people to communicate and transact with billions of customers, no matter where they are or how they pay.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchSan Francisco, CA, United StatesHQ recorded Nov 5, 202651-200121 contacts →

Exact match

“With over 3 trillion API transactions per month and trusted by customers across 40 industries, PubNub is a global leader in real-time infrastructure, offering APIs, edge…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchMcfarland, WI, United StatesHQ recorded Nov 5, 202651-200121 contacts →

Exact match

“Amtelco has been a family-owned communication software company since 1976 and devoted to providing secure, stable, and critical communication solutions for healthcare, contact…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchSan Jose, CA, United StatesHQ recorded Nov 5, 2026201-500119 contacts →

Exact match

“Kika's mission is to revolutionize how the world communicates and make it easier, faster, and more expressive.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25Exact matchWestlake Village, CA, United StatesHQ recorded Nov 5, 202651-200110 contacts →

Exact match

“VS Media is a cutting-edge technology platform provider specializing in scalable live video chat and bulletproof billing solutions.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 293 real time communication platforms based in the United States

See the full list, filter by size, metro and specialty, and access 5,371 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Real time communication platforms based in the United States at a glance

As of Nov 5, 2026
33.2%Verified-email coverage
55.2Average contacts per company
11-50Median size (employees)
6.1%Largest-city concentration · San Francisco
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
83
11-50
119
51-200
58
201-500
19
501-1,000
6
1,001-5,000
3
5,001-10,000
1
10001+
3

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 293 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 “real time communication 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 5,371 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 November 5, 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 “real time communication platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many real time communication platforms are there based in the United States?

RevenueBase identified 293 company matches for real time communication platforms associated with the United States as of November 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?

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

Which city has the most real time communication platforms?

San Francisco leads with 18 company records, followed by New York (12) and Wilmington (11).

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 5,371 professional contacts with verified work emails tracked across these 293 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 November 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 293 real time communication platforms based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

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.