Company lists · Data refreshed September 2026

Top 25 Diagnostic testing companies worldwide

Name: Diagnostic testing companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 10,869 companies tracked

RevenueBase identified 10,869 diagnostic testing companies worldwide as of September 2026 and tracks 552,796 professional contacts across them, including 134,311 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers diagnostic testing 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 diagnostic testing 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

10,869Companies

552,796Contacts tracked

134,311Verified emails

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The 25 largest diagnostic testing companies worldwide

Ranked by team size

Top 25 of 10,869 diagnostic testing companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to diagnostic testing companies: 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	Agilent Technologies	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 19, 2026	10001+	48,455 contacts →
	Indirect evidence “Agilent customers are finding new ways to treat cancer, ensure food, water, air, and medicine quality and safety, discover new drug treatments, research infectious diseases, and…” Source: RevenueBase Database · checked Sep 19, 2026
2	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 19, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 19, 2026
3	Quest Diagnostics	Partial evidence	Secaucus, NJ, United StatesHQ checked Sep 19, 2026	10001+	27,884 contacts →
	Partial evidence “Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Source: RevenueBase Database · checked Sep 19, 2026
4	DASA	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	10001+	19,606 contacts →
	Indirect evidence “A Dasa é uma das maiores empresas de saúde do mundo, líder em medicina diagnóstica no Brasil.” Source: RevenueBase Database · checked Sep 19, 2026
5	Eurofins	Indirect evidence	LuxembourgHQ checked Sep 19, 2026	10001+	11,653 contacts →
	Indirect evidence “Since 1987, Eurofins has grown from one laboratory in Nantes, France to over staff across a network of independent companies in 59 countries, operating over 950 laboratories.” Source: RevenueBase Database · checked Sep 19, 2026
6	Grupo Fleury	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	10001+	10,468 contacts →
	Indirect evidence “O Grupo Fleury é reconhecido como uma referência de qualidade em medicina diagnóstica no país, com soluções completas, coordenação de cuidado centrada no indivíduo, capacidade de…” Source: RevenueBase Database · checked Sep 19, 2026
7	Beckman Coulter Diagnostics	Partial evidence	Brea, CA, United StatesHQ checked Sep 19, 2026	10001+	10,069 contacts →
	Partial evidence “A global leader in advanced diagnostics, Beckman Coulter has challenged convention to elevate the diagnostic laboratory’s role in improving patient health for more than 80 years.” Source: RevenueBase Database · checked Sep 19, 2026
8	ALS	Partial evidence	Bowen Hills, AustraliaHQ checked Sep 19, 2026	10001+	9,234 contacts →
	Partial evidence “A global leader in testing, ALS provides comprehensive testing solutions to clients in a wide range of industries around the world.” Source: RevenueBase Database · checked Sep 19, 2026
9	Waters Corporation	Partial evidence	Milford, MA, United StatesHQ checked Sep 19, 2026	10001+	8,189 contacts →
	Partial evidence “Waters Corporation (NYSE: WAT) is a global leader in life sciences and diagnostics, dedicated to accelerating the benefits of pioneering science through analytical technologies…” Source: RevenueBase Database · checked Sep 19, 2026
10	Natera	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	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, 2026
11	DR LAL Pathlabs	Partial evidence	Gurgaon, IndiaHQ checked Sep 19, 2026	1,001-5,000	4,756 contacts →
	Partial evidence “Established in 1949, Dr Lal PathLabs today is the largest and most respected diagnostic service provider in the country.” Source: RevenueBase Database · checked Sep 19, 2026
12	Cepheid	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 19, 2026	5,001-10,000	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, 2026
13	Lancet Laboratories	Partial evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	5,001-10,000	4,365 contacts →
	Partial evidence “Lancet Laboratories SA is one of the leading pathology laboratories operating throughout South Africa, providing vital diagnostic and monitoring pathology services in the 9…” Source: RevenueBase Database · checked Sep 19, 2026
14	Quidelortho	Partial evidence	United StatesHQ checked Sep 19, 2026	5,001-10,000	3,581 contacts →
	Partial evidence “Bringing precision and passion in everything we do QuidelOrtho stands at the forefront of testing, tracking and disease analysis of health conditions ranging from HIV and…” Source: RevenueBase Database · checked Sep 19, 2026
15	Lifelabs Medical Laboratory Services	Partial evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	5,001-10,000	3,469 contacts →
	Partial evidence “LifeLabs is Canada’s leading provider of laboratory diagnostic information and digital health connectivity systems, enabling patients and healthcare practitioners to diagnose…” Source: RevenueBase Database · checked Sep 19, 2026
16	Guardant Health	Indirect evidence	Palo Alto, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	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, 2026
17	Werfen	Indirect evidence	L'hospitalet De Llobregat, SpainHQ checked Sep 19, 2026	5,001-10,000	3,097 contacts →
	Indirect evidence “Werfen is a growing, family-owned, innovative company founded in 1966 in Barcelona, Spain.” Source: RevenueBase Database · checked Sep 19, 2026
18	Revvity	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 19, 2026	10001+	2,938 contacts →
	Indirect evidence “At Revvity, “impossible” is inspiration, and ""can't be done"" is a call to action.” Source: RevenueBase Database · checked Sep 19, 2026
19	Ampath Laboratories	Indirect evidence	Centurion, South AfricaHQ checked Sep 19, 2026	1,001-5,000	2,873 contacts →
	Indirect evidence “Ampath provides comprehensive support services to the incorporated Pathology Laboratory practices of Drs Du Buisson, Kramer, Swart, Bouwer Inc Our primary goal is to provide…” Source: RevenueBase Database · checked Sep 19, 2026
20	Thyrocare Technologies LTD	Indirect evidence	Navi Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	2,823 contacts →
	Indirect evidence “Why is Thyrocare more than just a workplace?” Source: RevenueBase Database · checked Sep 19, 2026
21	Metropolis Healthcare	Indirect evidence	Behind Glaxo, IndiaHQ checked Sep 19, 2026	1,001-5,000	2,807 contacts →
	Indirect evidence “We believe that every human being deserves to know the truth about their inner health.” Source: RevenueBase Database · checked Sep 19, 2026
22	Arup Laboratories	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,768 contacts →
	Indirect evidence “ARUP Laboratories is a national clinical and anatomic pathology reference laboratory and a worldwide leader in innovative laboratory research and development.” Source: RevenueBase Database · checked Sep 19, 2026
23	Myriad Genetics	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,718 contacts →
	Strong 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, 2026
24	Unilabs	Strong evidence	Geneva, SwitzerlandHQ checked Sep 19, 2026	10001+	2,350 contacts →
	Strong evidence “We are one of Europe’s leading suppliers of clinical laboratory testing and medical diagnostic imaging services to private and public healthcare providers, local governments…” Source: RevenueBase Database · checked Sep 19, 2026
25	Pathcare	Strong evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	1,001-5,000	2,127 contacts →
	Strong evidence “PathCare Laboratories PathCare is a network of pathology laboratories that provide testing of specimens, primarily for medical diagnostic purposes.” Source: RevenueBase Database · checked Sep 19, 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: diagnostic testing 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 diagnostic testing companies.
Partial evidence: Its own public description names part of diagnostic testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name diagnostic testing 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 10,869 diagnostic testing companies worldwide

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Diagnostic testing companies worldwide at a glance

As of Sep 19, 2026

24.3%Verified-email coverage

50.9Average contacts per company

11-50Median size (employees)

1.0%Largest-city concentration · Sao Paulo

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

3,542

11-50

3,896

51-200

1,989

201-500

750

501-1,000

285

1,001-5,000

246

5,001-10,000

10001+

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 diagnostic testing 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 diagnostic testing companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “diagnostic testing 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 diagnostic testing 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 diagnostic testing 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, 134,311 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.

Diagnostic testing companies by location

49 lists · largest first

Every Diagnostic testing companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 diagnostic testing 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 diagnostic testing companies are there worldwide?

RevenueBase identified 10,869 diagnostic testing 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?

Agilent Technologies, headquartered in Santa Clara, tops this list with the largest team on record.

Which country has the most diagnostic testing companies?

The United States leads with 1,903 companies, followed by Brazil (1,666) and India (1,293). Every diagnostic testing companies list by country and city is linked on this page.

Which city has the most diagnostic testing companies?

Sao Paulo leads with 113 headquartered companies, followed by New Delhi (97) and Hyderabad (78).

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 134,311 verified decision-maker contacts tracked across these 10,869 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.

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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.