Company lists · Data refreshed September 2026
Top 25 Companion diagnostics companies worldwide
RevenueBase identified 1,491 companion diagnostics companies worldwide as of September 2026 and tracks 68,733 professional contacts across them, including 31,852 with verified work emails. The United States is the largest market and San Diego the largest hub.
This list covers companion diagnostics companies worldwide, 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 19, 2026. Country and city lists for companion diagnostics companies follow the table.
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 companion diagnostics companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 8,987 contacts → | ||||
Indirect evidence “At Illumina, our goal is to apply innovative technologies and revolutionary assays to the analysis of genetic variation and function, making studies possible that were not even…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 5,354 contacts → | ||||
Indirect evidence “Natera™ is a global leader in cell-free DNA and precision medicine, dedicated to oncology, women’s health, and organ health.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 4,445 contacts → | ||||
Partial evidence “Cepheid is dedicated to improving healthcare by pioneering molecular diagnostics that combine speed, accuracy, and flexibility.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 3,321 contacts → | ||||
Indirect evidence “Guardant Health is a leading precision medicine company focused on guarding wellness and giving every person more time free from cancer.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,718 contacts → | ||||
Partial evidence “Myriad Genetics is a leading molecular diagnostic testing and precision medicine company dedicated to advancing health and well-being for all.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,747 contacts → | ||||
Partial evidence “Foundation Medicine is a global, patient-focused precision medicine company delivering high-quality, transformative diagnostic solutions in cancer and other diseases.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,678 contacts → | ||||
Indirect evidence “Our vision: A world where every cancer treatment decision is as personal as the patient.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,400 contacts → | ||||
Indirect evidence “As a leading global drug discovery and development laboratory services organization, IQVIA Laboratories provides a broad range of central laboratory and specialty biomarker…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,048 contacts → | ||||
Indirect evidence “We see a world where every genetic condition is understood, and every patient receives the care they need to live their healthiest life through genomics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 957 contacts → | ||||
Indirect evidence “Ambry Genetics, a Tempus company, translates scientific research into clinically actionable test results based upon a deep understanding of the human genome and the biology behind…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 954 contacts → | ||||
Partial evidence “MedGenome is a global genomics and precision diagnostics company focused on enabling accurate, early and actionable diagnosis through advanced genomic science.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 760 contacts → | ||||
Indirect evidence “As a global leader in precision medicine testing services, we partner with our clients to address the most complex biomarker and bioanalytical challenges and deliver highly…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 701 contacts → | ||||
Indirect evidence “European leader in the sector of specialized medical pathology, Eurofins Biomnis carries out over analyses per day from a range of over 2,500 available tests, including…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 696 contacts → | ||||
Partial evidence “BillionToOne is a precision diagnostics company with the mission to make molecular diagnostics more accurate, efficient, and accessible.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 682 contacts → | ||||
Partial evidence “Castle Biosciences (Nasdaq: CSTL) is a leading diagnostics company improving health through innovative tests that guide patient care.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 677 contacts → | ||||
Partial evidence “The Menarini Group ("Menarini"), a leading Italian pharmaceutical and diagnostics company, and Stemline Therapeutics, Inc.("Stemline"), a wholly-owned subsidiary of the Menarini…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 676 contacts → | ||||
Indirect evidence “Every second of every hour of every day, 44 of our products are employed in the battle against cancer.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 675 contacts → | ||||
Partial evidence “Veracyte is a global diagnostics company that empowers clinicians with the high-value insights they need to guide and assure patients at pivotal moments in the race to diagnose…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 643 contacts → | ||||
Partial evidence “Founded in in Goa, India, Molbio Diagnostics is a global leader in IVD, transforming healthcare across 85+ countries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 606 contacts → | ||||
Partial evidence “Sysmex supports healthcare professionals and patients around the world with a broad range of medical diagnostics products and solutions in a variety of fields.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 556 contacts → | ||||
Partial evidence “Fujirebio is a world leading in vitro diagnostics (IVD) company and innovation-driven content provider, enabling breakthrough diagnostic solutions to reach patients worldwide…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 527 contacts → | ||||
Indirect evidence “LetsGetChecked is proud to be Powered by Fuze Health.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 480 contacts → | ||||
Partial evidence “CORE Diagnostics is a Clinical laboratory focused on Next Generation Diagnostics for disease stratification and therapy selection.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 470 contacts → | ||||
Partial evidence “CENTOGENE is a leading company in the field of genetic diagnostics and precision medicine, dedicated to transforming clinical, genetic, and biochemical data into medical solutions…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 456 contacts → | ||||
Indirect evidence “Cerba HealthCare, a leading player in medical diagnosis, aims to support the evolution of health systems towards more prevention.” Source: RevenueBase Database · checked Sep 19, 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: companion diagnostics 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 companion diagnostics companies.
- Partial evidence
- Its own public description names part of companion diagnostics companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name companion diagnostics 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 1,491 companion diagnostics companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 31,852 reachable decision-makers.
Free signup · no credit card
Companion diagnostics companies worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 companion diagnostics 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.
- Coverage
- Every country. Country and city lists for companion diagnostics companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “companion diagnostics 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 companion diagnostics 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 companion diagnostics companies, and records with no verified work email.
- 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, 31,852 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 19, 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.
Companion diagnostics companies by location
7 lists · largest firstEvery Companion diagnostics companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Companion diagnostics companies based in the United States488
- Companion diagnostics companies based in India97
- Companion diagnostics companies based in the United Kingdom62
- Companion diagnostics companies based in Germany51
- Companion diagnostics companies based in Spain48
- Companion diagnostics companies based in Canada36
- Companion diagnostics companies based in France27
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 companion diagnostics 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 companion diagnostics companies are there worldwide?
RevenueBase identified 1,491 companion diagnostics companies worldwide 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?
Illumina, headquartered in San Diego, tops this list with the largest team on record.
Which country has the most companion diagnostics companies?
The United States leads with 488 companies, followed by India (97) and the United Kingdom (62). Every companion diagnostics companies list by country and city is linked on this page.
Which city has the most companion diagnostics companies?
San Diego leads with 27 headquartered companies, followed by Singapore (25) and Cambridge (19).
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 31,852 verified decision-maker contacts tracked across these 1,491 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 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,491 companion diagnostics companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
Browse: Companies home · Lists by location · New 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 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.