Company lists · Data refreshed September 2026

Top 25 Medical messaging platforms based in the United States

RevenueBase identified 301 medical messaging platforms headquartered in the United States as of September 2026 and tracks 4,304 professional contacts across them, including 1,693 with verified work emails. San Francisco is the largest hub.

This list covers medical 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, 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
301Companies
4,304Contacts tracked
1,693Verified emails
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The 25 largest medical messaging platforms based in the United States

Ranked by team size
Top 25 of 301 medical messaging platforms 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 medical messaging platforms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidencePlano, TX, United StatesHQ checked Sep 28, 2026501-1,000388 contacts →

Indirect evidence

“Spok is proud to be a global leader in healthcare communications.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceEl Segundo, CA, United StatesHQ checked Sep 28, 2026201-500299 contacts →

Indirect evidence

“Healthcare communication has become fragmented across systems, devices, and departments, forcing clinicians to act as the “middleware” that manually routes information when…”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceSanta Barbara, CA, United StatesHQ checked Sep 28, 2026201-500291 contacts →

Indirect evidence

“Artera is an agentic company strengthening how healthcare providers communicate and care for patients.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceRidgefield, NJ, United StatesHQ checked Sep 28, 202651-200210 contacts →

Indirect evidence

“GD is a Healthtech company specializing in communication solutions that help EMS and hospitals deliver simply seamless patient care.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceMadison, CT, United StatesHQ checked Sep 28, 202651-200152 contacts →

Indirect evidence

“Clarity Software Solutions, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceRadnor, PA, United StatesHQ checked Sep 28, 202651-200122 contacts →

Indirect evidence

“Relay Network is an innovator in how businesses communicate with their customers.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202651-200102 contacts →

Indirect evidence

“At Solv, we believe getting access to high quality, last-minute care should be simple, fast and effortless.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceWaltham, MA, United StatesHQ checked Sep 28, 202651-200100 contacts →

Indirect evidence

“Hospital staff communication is the largest controllable variables for increasing operational efficiency while reducing patient risk.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceDallas, TX, United StatesHQ checked Sep 28, 202651-20098 contacts →

Indirect evidence

“Looking for a prescription for your administrative headaches?”

Source: RevenueBase Database · checked Sep 28, 2026
10Strong evidenceNewport Beach, CA, United StatesHQ checked Sep 28, 2026n/a93 contacts →

Strong evidence

“Curogram's goal is to empower patients with a patient-centric healthcare messaging platform and universal patient portal, solving the many challenges patients face today including…”

Source: RevenueBase Database · checked Sep 28, 2026
11Strong evidenceLewisville, TX, United StatesHQ checked Sep 28, 202651-20088 contacts →

Strong evidence

“American Messaging continues to lead the industry by bridging the reliability of traditional paging with the flexibility and intelligence of next-generation messaging platforms.”

Source: RevenueBase Database · checked Sep 28, 2026
12Indirect evidenceAustin, TX, United StatesHQ checked Sep 28, 202651-20080 contacts →

Indirect evidence

“The Network Where Healthcare Connects.”

Source: RevenueBase Database · checked Sep 28, 2026
13Strong evidenceMarlborough, MA, United StatesHQ checked Sep 28, 202611-5072 contacts →

Strong evidence

“Skyscape® is a leading provider of mobile platforms for medical professionals, trusted by more than one million healthcare professionals worldwide.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceNew York, United StatesHQ checked Sep 28, 202651-20071 contacts →

Indirect evidence

“Klara was founded in 2013 with a mission to transform healthcare communication, so every patient can receive great care.”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceDublin, OH, United StatesHQ checked Sep 28, 202651-20060 contacts →

Partial evidence

“Committed to simplifying the business of healthcare, Updox is a single collaboration platform for out-of-hospital healthcare providers.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceWestford, MA, United StatesHQ checked Sep 28, 202651-20059 contacts →

Indirect evidence

“Biscom is now a Concord Technologies company.”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceChattanooga, TN, United StatesHQ checked Sep 28, 202611-5055 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
18Partial evidenceNew Orleans, TX, United StatesHQ checked Sep 28, 202611-5045 contacts →

Partial evidence

“Watershed Health is a SaaS platform that connects all provider types and health plans to enable communication, collaboration, and community-wide data sharing - enabling better…”

Source: RevenueBase Database · checked Sep 28, 2026
19Partial evidenceBoston, MA, United StatesHQ checked Sep 28, 202611-5044 contacts →

Partial evidence

“Counsel Health delivers AI-enabled, physician-supervised primary care through a secure messaging-based experience.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceCambridge, MA, United StatesHQ checked Sep 28, 202651-20042 contacts →

Indirect evidence

“LuxSci is a leading provider of secure healthcare communications solutions.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceBoise, ID, United StatesHQ checked Sep 28, 202611-5040 contacts →

Indirect evidence

“Kno2 is leading the future of healthcare communication and thoughtfully solving healthcare’s biggest problems.”

Source: RevenueBase Database · checked Sep 28, 2026
22Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202651-20039 contacts →

Partial evidence

“Amplify is the modern communications platform built for regulated industries.”

Source: RevenueBase Database · checked Sep 28, 2026
23Indirect evidenceSan Francisco, United StatesHQ checked Sep 28, 202651-20037 contacts →

Indirect evidence

“Valerie Health is reimagining how independent practices operate by using AI to modernize patient and provider communication interfaces, provide better care, and drive operational…”

Source: RevenueBase Database · checked Sep 28, 2026
24Partial evidenceBurlington, VT, United StatesHQ checked Sep 28, 202651-20035 contacts →

Partial evidence

“OhMD is a HIPAA-compliant omni-channel patient communication platform built for physician practices struggling with high inbound patient call volume.”

Source: RevenueBase Database · checked Sep 28, 2026
25Indirect evidenceNew York, United StatesHQ checked Sep 28, 202651-20035 contacts →

Indirect evidence

“MD Integrations is a doctor-founded asynchronous telemedicine technology company connecting virtual healthcare providers with patients using a best-in-class white-label…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 301 medical messaging platforms based in the United States

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Medical messaging platforms based in the United States at a glance

As of Sep 28, 2026
39.3%Verified-email coverage
14.3Average contacts per company
11-50Median size (employees)
6.0%Largest-city concentration · San Francisco
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
127
11-50
134
51-200
33
201-500
4
501-1,000
2

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 301 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 medical messaging 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 “medical messaging 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 medical messaging 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 medical 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 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, 1,693 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.

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 medical messaging 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 medical messaging platforms are there based in the United States?

RevenueBase identified 301 medical 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?

SPOK, headquartered in Plano, tops this list with the largest team on record.

Which city has the most medical messaging platforms?

San Francisco leads with 18 headquartered companies, followed by New York (14) and Austin (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 1,693 verified decision-maker contacts tracked across these 301 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.