Company lists · Data refreshed September 2026
Top 25 In-app messaging platforms based in the United States
RevenueBase identified 228 in-app messaging platforms headquartered in the United States as of September 2026 and tracks 4,685 professional contacts across them, including 2,001 with verified work emails and 1,398 with mobile numbers. New York is the largest hub.
This list covers in-app messaging 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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.
The 25 largest in-app messaging platforms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 532 | ||||
“Acoustic, L.P.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 445 | ||||
“Create personalized customer journeys that engage and convert with our versatile customer engagement platform.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 270 | ||||
“The Firstup Intelligent Communication Platform equips organizations to improve productivity, retention, labor efficiency, safety compliance, and revenue performance by activating…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 239 | ||||
“Courier is the customer messaging and notifications platform where your team and AI agents collaborate.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | VIBESPartial evidence | 236 | |||
“Vibes’ mobile-first platform creates personal, revenue-driving and long-term mobile engagement between consumers and the world-class brands they love.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 189 | ||||
“OneSignal is the leading customer engagement platform for push, email, SMS/RCS, and in-app messaging.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 138 | ||||
“Kipsu is pioneering a software-based solution designed to revolutionize how service-driven brands interact with consumers.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | Trum PIAIndirect evidence | 110 | |||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 69 | ||||
“Community helps marketing teams build trust, loyalty, and long-term customer value through personalized, two-way conversations with their audiences.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 62 | ||||
“Business Class Team Texting to help Sales and Service Teams!” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | QUIQIndirect evidence | 59 | |||
“Quiq is a leading technology company based in Bozeman, Montana that makes it easy for people to have a conversation with a company.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | Text RequestPartial evidence | 55 | |||
“Text Request, an Esendex company, is the business texting platform built to ignite customer engagement.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | TextusIndirect evidence | 53 | |||
“TextUs is business texting software that increases engagement with prospects, customers, workers, and candidates resulting in substantial gains in pipeline and productivity.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | WebarooIndirect evidence | 51 | |||
“Webaroo Inc.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | Sinch SimpletextingIndirect evidence | 50 | |||
“SimpleTexting is the easiest way to send messages to customers, employees, or anyone else you need to reach.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | MOGLIIndirect evidence | 49 | |||
“At Mogli, we believe texting from Salesforce should be easy.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 45 | ||||
“mGage is now part of Kaleyra, Inc.(NYSE American: KLR)(KLR WS), a global group providing mobile communication services to financial institutions, e-commerce players, OTTs…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 35 | ||||
“HubEngage™ is a unified employee communications, engagement, recognition and instant messaging platform.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | ZixflowPartial evidence | 32 | |||
“Accelerate Growth with AI CRM, Automation & Messaging Across RCS, SMS, Email, and WhatsApp” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 31 | ||||
“From SMS and WhatsApp to multi-channel mobile journeys, Esendex helps you deliver business messaging that puts the power in your customers’ hands.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | Mobile CoachIndirect evidence | 31 | |||
“Need to influence and change behavior-among your customers, your employees, or any other group you want to reach?” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | SubtextStrong evidence | 27 | |||
“Subtext is a text messaging platform that connects newsrooms, media companies, musicians, creators, brands, and thought leaders with their audiences - free from the chaos of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 26 | ||||
“Knock is infrastructure for sending product and customer messaging.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 26 | ||||
“Hey there!” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | MessagespringPartial evidence | 26 | |||
“MessageSpring simplifies your communication efforts by reaching audiences who are most important to you through a single platform, with the right message, at the right time, in…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 228 in-app messaging platforms based in the United States
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In-app messaging platforms based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 in-app messaging platforms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “in-app messaging platforms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among in-app messaging 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 an evidence 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, 2,001 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 3, 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
How many in-app messaging platforms are there based in the United States?
RevenueBase identified 228 in-app messaging 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?
Acoustic, headquartered in Waltham, tops this list with the largest team on record.
Which city has the most in-app messaging platforms?
New York leads with 20 headquartered companies, followed by San Francisco (19) and Chicago (7).
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 2,001 verified decision-maker contacts tracked across these 228 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 3, 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.
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