Company lists · Data refreshed September 2026
Top 25 Monitoring device companies based in the United States
RevenueBase identified 270 monitoring device companies headquartered in the United States as of September 2026 and tracks 13,104 professional contacts across them, including 4,850 with verified work emails. Houston is the largest hub.
This list covers monitoring device companies 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 20, 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.
The 25 largest monitoring device companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,249 contacts → | ||||
Partial evidence “For over 35 years, Masimo has developed innovative monitoring technologies designed to improve patient outcomes and streamline clinical workflows.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,754 contacts → | ||||
Indirect evidence “iRhythm is a leading digital health care company that creates trusted solutions that detect, predict, and prevent disease.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,247 contacts → | ||||
Indirect evidence “As a global leader in precision measurement sensing technologies, VPG addresses an expanding array of applications in which accuracy, reliability, and repeatability make the…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 494 contacts → | ||||
Indirect evidence “CardioNet was just the beginning.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 490 contacts → | ||||
Partial evidence “Rapid Response Monitoring is a leading provider of professional monitoring services founded in 1992.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 375 contacts → | ||||
Partial evidence “As the premier provider of critical event monitoring across North America, Becklar Monitoring is prepared to monitor any event, anytime, with speed, accuracy and exceptional…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 339 contacts → | ||||
Strong evidence “As the nation's leading medical device service and monitoring company, we are committed to improving the standard of independent living and promote healthy aging through our…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 287 contacts → | ||||
Partial evidence “Nonin Medical invented finger pulse oximetry and is a global leader in developing highly accurate noninvasive medical monitoring solutions that improve the quality of people's…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 263 contacts → | ||||
Partial evidence “Preventice Solutions is a leading developer of mobile health solutions and remote monitoring services that connect patients and caregivers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 205 contacts → | ||||
Strong evidence “PaceMate is the market-leading, tech-enabled cardiac device monitoring platform serving integrated delivery networks and academic health systems nationwide.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 189 contacts → | ||||
Indirect evidence “AliveCor, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 120 contacts → | ||||
Indirect evidence “For more than 50 years Kavlico Pressure Sensors has been a leading expert in designing, developing, and manufacturing a broad range of precision, pressure, pressure and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 119 contacts → | ||||
Strong evidence “RhythMedix is a fully integrated cardiac monitoring company with in-house device manufacturing, software development, and U.S-based monitoring services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 114 contacts → | ||||
Indirect evidence “The OPTEX Group is dedicated to creating a safer, more secure, and comfortable world through sensing technologies.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 109 contacts → | ||||
Indirect evidence “For over 30 years, Mortara Instrument, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 89 contacts → | ||||
Indirect evidence “For over 55 years, Millar has been a trusted name in innovation, precision, and reliability.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 87 contacts → | ||||
Indirect evidence “Caretaker Medical is a cutting-edge digital health startup headquartered in Charlottesville, Virginia.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 78 contacts → | ||||
Indirect evidence “At Zywie, we’re redefining how cardiac data translates into clinical insight.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 77 contacts → | ||||
Partial evidence “ScottCare is the leading provider of telemetry monitoring solutions designed specifically for cardiac and pulmonary rehabilitation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 75 contacts → | ||||
Partial evidence “Contec Medical Systems Co, Ltd.(hereinafter referred to as CONTEC) is a high-tech company which focuses on research, manufacture and distribution of medical devices since 1996…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 71 contacts → | ||||
Strong evidence “Cardiac RMS, Remote Monitoring Solutions, is an award-winning CIED remote monitoring service provider that partners with physician practices to best manage their remote device…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 59 contacts → | ||||
Partial evidence “Sonicu delivers modern, smart, and reliable monitoring solutions that protect people and products while keeping operations compliant.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 56 contacts → | ||||
Indirect evidence “MS Tech is a global leader in designing, manufacturing, and innovation of advanced sensors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 55 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 55 contacts → | ||||
Partial evidence “Rhythm Express is at the forefront of cardiac monitoring technology, uniting compassionate care with innovative solutions to improve the quality of life for cardiac patients.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: monitoring device companies. 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 monitoring device companies.
- Partial evidence
- Its own public description names part of monitoring device companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name monitoring device companies. 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 270 monitoring device companies based in the United States
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Monitoring device companies based in the United States at a glance
As of Sep 20, 2026Companies by employee count
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 270 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 monitoring device companies, 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 “monitoring device companies”. 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 monitoring device companies), 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 monitoring device companies, 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, 4,850 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 20, 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 monitoring device companies, 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 monitoring device companies are there based in the United States?
RevenueBase identified 270 monitoring device companies 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?
Masimo, headquartered in Irvine, tops this list with the largest team on record.
Which city has the most monitoring device companies?
Houston leads with 7 headquartered companies, followed by San Francisco (6) and San Jose (6).
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 4,850 verified decision-maker contacts tracked across these 270 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 20, 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.
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