Company lists · Data refreshed September 2026

Top 25 Messaging platforms for business based in the United States

Name: Messaging platforms for business based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 450 companies tracked

RevenueBase identified 450 messaging platforms for business headquartered in the United States as of September 2026 and tracks 16,170 professional contacts across them, including 4,924 with verified work emails. San Francisco is the largest hub.

This list covers messaging platforms for business 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 28, 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 28, 2026 86% judged on-target in blind review

450Companies

16,170Contacts tracked

4,924Verified emails

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The 25 largest messaging platforms for business based in the United States

Ranked by team size

Top 25 of 450 messaging platforms for business based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to messaging platforms for business: 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	Twilio	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,047 contacts →
	Partial evidence “Today's leading companies trust Twilio's Customer Engagement Platform (CEP) to build direct, personalized relationships with their customers everywhere in the world.” Source: RevenueBase Database · checked Sep 28, 2026
2	SLACK	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	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 28, 2026
3	Attentive	Indirect evidence	New York, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,287 contacts →
	Indirect evidence “Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Source: RevenueBase Database · checked Sep 28, 2026
4	Sendbird	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 28, 2026	201-500	297 contacts →
	Indirect evidence “Sendbird is the AI customer experience company.” Source: RevenueBase Database · checked Sep 28, 2026
5	Firstup	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	270 contacts →
	Partial evidence “The Firstup Intelligent Communication Platform equips organizations to improve productivity, retention, labor efficiency, safety compliance, and revenue performance by activating…” Source: RevenueBase Database · checked Sep 28, 2026
6	Clickatell	Indirect evidence	Downtown Redwood City, CA, United StatesHQ checked Sep 28, 2026	201-500	267 contacts →
	Indirect evidence “We enable businesses to drive engagement, revenue, and loyalty with AI-powered chat commerce.” Source: RevenueBase Database · checked Sep 28, 2026
7	Movius	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 28, 2026	51-200	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 28, 2026
8	Courier	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	n/a	237 contacts →
	Strong evidence “Courier is the customer messaging and notifications platform where your team and AI agents collaborate.” Source: RevenueBase Database · checked Sep 28, 2026
9	Vitel Global	Indirect evidence	South Plainfield, NJ, United StatesHQ checked Sep 28, 2026	51-200	212 contacts →
	Indirect evidence “Communication is the backbone of every business.” Source: RevenueBase Database · checked Sep 28, 2026
10	Solutions By Text	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	201-500	183 contacts →
	Indirect evidence “SBT helps businesses in regulated industries turn consumer intent into completed action.” Source: RevenueBase Database · checked Sep 28, 2026
11	Leapxpert	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	179 contacts →
	Indirect evidence “LeapXpert is the leader in Responsible Business Communication.” Source: RevenueBase Database · checked Sep 28, 2026
12	Vertical Communications	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 28, 2026	201-500	175 contacts →
	Partial 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 28, 2026
13	LOOM	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	146 contacts →
	Partial evidence “We're bringing video messaging to work and empowering everyone to communicate more effectively, wherever they are.” Source: RevenueBase Database · checked Sep 28, 2026
14	Referrizer LLC	Partial evidence	Suite 200 Deerfield Beach, FL, United StatesHQ checked Sep 28, 2026	51-200	143 contacts →
	Partial evidence “Referrizer provides an all-in-one communication platform that helps business owners get new customers, increase repeat purchases, and generate long-term sustainable results.” Source: RevenueBase Database · checked Sep 28, 2026
15	Trum PIA	Indirect evidence	La Palma, CA, United StatesHQ checked Sep 28, 2026	51-200	110 contacts →
	Indirect evidence “Trum·pia was founded in 2006 and has long been ranked #1 in SMS marketing by Forbes because of our ease-of-use, prompt support, and one-of-a-kind automation that scales your…” Source: RevenueBase Database · checked Sep 28, 2026
16	Fuze An 8x8 Company	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	501-1,000	103 contacts →
	Partial evidence “Fuze is a global cloud communications and collaboration software platform for the enterprise that was acquired by 8x8.” Source: RevenueBase Database · checked Sep 28, 2026
17	Cometchat	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	89 contacts →
	Indirect evidence “Finishing your product shouldn’t be harder than building it.” Source: RevenueBase Database · checked Sep 28, 2026
18	LINQ	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 28, 2026	11-50	82 contacts →
	Indirect evidence “Linq is the infrastructure to build AI agents in iMessage, covering a suite of enterprise-ready APIs for iMessage, SMS, RCS and voice channels, built for engineers and product…” Source: RevenueBase Database · checked Sep 28, 2026
19	community.com	Indirect evidence	Santa Monica, CA, United StatesHQ checked Sep 28, 2026	51-200	72 contacts →
	Indirect evidence “Community helps marketing teams build trust, loyalty, and long-term customer value through personalized, two-way conversations with their audiences.” Source: RevenueBase Database · checked Sep 28, 2026
20	MIO	Strong evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	11-50	72 contacts →
	Strong 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 28, 2026
21	Beetexting	Indirect evidence	Bloomington, IL, United StatesHQ checked Sep 28, 2026	11-50	65 contacts →
	Indirect evidence “Business Class Team Texting to help Sales and Service Teams!” Source: RevenueBase Database · checked Sep 28, 2026
22	SWIT	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	62 contacts →
	Indirect evidence “Swit is every team's work hub that consolidates collaboration essentials in one place - task, chat, goals, approvals, and integrations.” Source: RevenueBase Database · checked Sep 28, 2026
23	QUIQ	Indirect evidence	Bozeman, MT, United StatesHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “Quiq is a leading technology company based in Bozeman, Montana that makes it easy for people to have a conversation with a company.” Source: RevenueBase Database · checked Sep 28, 2026
24	LAYER	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	58 contacts →
	Indirect evidence “Conversation builds relationship.” Source: RevenueBase Database · checked Sep 28, 2026
25	Text Request	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 28, 2026	11-50	55 contacts →
	Partial evidence “Text Request, an Esendex company, is the business texting platform built to ignite customer engagement.” Source: RevenueBase Database · checked Sep 28, 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: messaging platforms for business. 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 messaging platforms for business.
Partial evidence: Its own public description names part of messaging platforms for business, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name messaging platforms for business. 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 450 messaging platforms for business based in the United States

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Messaging platforms for business based in the United States at a glance

As of Sep 28, 2026

30.5%Verified-email coverage

35.9Average contacts per company

11-50Median size (employees)

12.4%Largest-city concentration · San Francisco

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

187

11-50

191

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 450 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 messaging platforms for business, 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 “messaging platforms for business”. 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 messaging platforms for business), 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 messaging platforms for business, 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, 4,924 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 28, 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.

Messaging platforms for business by metro

Messaging platforms for business in San Francisco56

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 messaging platforms for business, 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 messaging platforms for business are there based in the United States?

RevenueBase identified 450 messaging platforms for business 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?

Twilio, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most messaging platforms for business?

San Francisco leads with 56 headquartered companies, followed by New York (24) and Denver (11).

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 4,924 verified decision-maker contacts tracked across these 450 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 28, 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.