Company lists · Data refreshed September 2026

Top 25 Research and development outsourcing providers worldwide

Name: Research and development outsourcing providers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 3,986 companies tracked

RevenueBase identified 3,986 research and development outsourcing providers worldwide as of September 2026 and tracks 339,262 professional contacts across them, including 152,395 with verified work emails and 79,311 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers research and development outsourcing providers 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 5, 2026. Country and city lists for research and development outsourcing providers 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 5, 2026 86% judged on-target in blind review

3,986Companies

339,262Contacts tracked

152,395Verified emails

79,311Mobile numbers

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The 25 largest research and development outsourcing providers worldwide

Ranked by team size

Top 25 of 3,986 research and development outsourcing providers worldwide, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to research and development outsourcing providers: 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	Thermo Fisher Scientific	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 5, 2026	10001+	70,907 contacts →
	Indirect evidence “About Thermo Fisher Scientific Thermo Fisher Scientific Inc.” Source: RevenueBase Database · checked Sep 5, 2026
2	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 5, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 5, 2026
3	PPD	Strong evidence	Waltham, MA, United StatesHQ checked Sep 5, 2026	10001+	20,530 contacts →
	Strong evidence “The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…” Source: RevenueBase Database · checked Sep 5, 2026
4	Syneos Health	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 5, 2026	10001+	18,228 contacts →
	Indirect evidence “Syneos Health® is a leading fully integrated biopharmaceutical solutions organization built to accelerate customer success.” Source: RevenueBase Database · checked Sep 5, 2026
5	Charles River Laboratories	Indirect evidence	Wilmington, MA, United StatesHQ checked Sep 5, 2026	10001+	14,166 contacts →
	Indirect evidence “At Charles River, we are guided by our strong purpose-to create healthier lives-which centers around the patients who rely on the therapeutics we help to develop, the animals in…” Source: RevenueBase Database · checked Sep 5, 2026
6	Fortrea	Strong evidence	Research Triangle Park, NC, United StatesHQ checked Sep 5, 2026	10001+	10,632 contacts →
	Strong evidence “Fortrea (Nasdaq: FTRE) is a leading global clinical research organization (CRO) dedicated to providing innovative clinical development solutions to the life sciences industry.” Source: RevenueBase Database · checked Sep 5, 2026
7	Medpace	Strong evidence	Cincinnati, OH, United StatesHQ checked Sep 5, 2026	5,001-10,000	5,960 contacts →
	Strong evidence “Medpace is a scientifically-driven, global, full-service clinical contract research organization (CRO) providing Phase I-IV clinical development services to the biotechnology…” Source: RevenueBase Database · checked Sep 5, 2026
8	Almac Group	Indirect evidence	Craigavon, United KingdomHQ checked Sep 5, 2026	5,001-10,000	4,577 contacts →
	Indirect evidence “Partnering to Advance Human Health A unique culture delivering exceptional solutions: Almac is a financially secure, privately owned organisation with 7,800+ employees globally.” Source: RevenueBase Database · checked Sep 5, 2026
9	Worldwide Clinical Trials	Partial evidence	Research Triangle Park, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,440 contacts →
	Partial evidence “Worldwide Clinical Trials (Worldwide) is a global CRO serving development-driven biopharmaceutical companies, with more than 4,400 professionals operating across more than 70…” Source: RevenueBase Database · checked Sep 5, 2026
10	Eversana	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	5,001-10,000	3,149 contacts →
	Indirect evidence “EVERSANA® is a leading independent provider of global services to the life sciences industry.” Source: RevenueBase Database · checked Sep 5, 2026
11	Evotec	Partial evidence	Hamburg, GermanyHQ checked Sep 5, 2026	5,001-10,000	3,036 contacts →
	Partial evidence “Evotec is a biotechnology company that is committed to advancing drug discovery and development.” Source: RevenueBase Database · checked Sep 5, 2026
12	Medidata Solutions	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,704 contacts →
	Indirect evidence “Medidata is powering smarter treatments and healthier people through digital solutions to support clinical trials.” Source: RevenueBase Database · checked Sep 5, 2026
13	Premier Research	Partial evidence	Morrisville, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,584 contacts →
	Partial evidence “Premier Research International LLC (Premier) is a global leader in clinical research and consulting services with expertise in driving an efficient and effective path to market…” Source: RevenueBase Database · checked Sep 5, 2026
14	PSI CRO	Partial evidence	Zug, SwitzerlandHQ checked Sep 5, 2026	1,001-5,000	2,494 contacts →
	Partial evidence “PSI is a leading full-service global Contract Research Organization whose key strength is predictable patient enrollment across multiple therapeutic areas.” Source: RevenueBase Database · checked Sep 5, 2026
15	Propharma	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,079 contacts →
	Indirect evidence “At ProPharma, we help pharmaceutical, biotechnology, and medical device companies bring life-changing therapies to market.” Source: RevenueBase Database · checked Sep 5, 2026
16	Precision For Medicine	Strong evidence	Bethesda, MD, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,781 contacts →
	Strong evidence “Precision for Medicine is an industry-leading global clinical research services organization, purpose-built to improve the clinical research and development process for new…” Source: RevenueBase Database · checked Sep 5, 2026
17	Altasciences	Strong evidence	Laval, QC, CanadaHQ checked Sep 5, 2026	1,001-5,000	1,759 contacts →
	Strong evidence “Outsourcing made easy with a one-stop solution to early-phase drug development.” Source: RevenueBase Database · checked Sep 5, 2026
18	KBI Biopharma	Partial evidence	Durham, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,645 contacts →
	Partial evidence “KBI Biopharma is an award-winning biopharmaceutical contract services organization providing fully-integrated, accelerated drug development and biomanufacturing services to…” Source: RevenueBase Database · checked Sep 5, 2026
19	Pharmalex	Indirect evidence	Bad Homburg, GermanyHQ checked Sep 5, 2026	1,001-5,000	1,644 contacts →
	Indirect evidence “PharmaLex is now part of Cencora, a leading global pharmaceutical solutions organization centered on improving lives around the world PharmaLex adds to Cencora’s expanding suite…” Source: RevenueBase Database · checked Sep 5, 2026
20	Clinchoice	Partial evidence	Horsham, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,516 contacts →
	Partial evidence “ClinChoice is a leading global full & functional service CRO, renowned for its exceptional product development and lifecycle management capabilities across the pharmaceutical…” Source: RevenueBase Database · checked Sep 5, 2026
21	Perceptive INC	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,197 contacts →
	Partial evidence “Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Source: RevenueBase Database · checked Sep 5, 2026
22	Genscript	Indirect evidence	Piscataway, NJ, United StatesHQ checked Sep 5, 2026	5,001-10,000	1,194 contacts →
	Indirect evidence “GenScript Life Science Group is a part of GenScript Biotech Corporation.” Source: RevenueBase Database · checked Sep 5, 2026
23	Celerion	Partial evidence	Lincoln, NE, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,080 contacts →
	Partial evidence “Celerion, a leader in early clinical research, delivers Applied Translational Medicine.” Source: RevenueBase Database · checked Sep 5, 2026
24	CTI Clinical Trial And Consulting Services	Partial evidence	Covington, KY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,043 contacts →
	Partial evidence “CTI Clinical Trial and Consulting Services is a global, privately held, research service organization, delivering a complete spectrum of clinical trial and consulting services…” Source: RevenueBase Database · checked Sep 5, 2026
25	Inotiv	Strong evidence	West Lafayette, IN, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,015 contacts →
	Strong evidence “WHERE INSIGHTS LEAD TO ANSWERS Expect More In choosing a partner for discovery, development and research models, expect more: more attention, more insight, and a superlative…” Source: RevenueBase Database · checked Sep 5, 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: research and development outsourcing providers. 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 research and development outsourcing providers.
Partial evidence: Its own public description names part of research and development outsourcing providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name research and development outsourcing providers. 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 3,986 research and development outsourcing providers worldwide

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Research and development outsourcing providers worldwide at a glance

As of Sep 5, 2026

44.9%Verified-email coverage

23.4%Mobile-number coverage

85.1Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

1,981

11-50

1,149

51-200

514

201-500

154

501-1,000

1,001-5,000

5,001-10,000

10001+

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 research and development outsourcing providers, 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: 21 countries, largest first: the United States, the United Kingdom, India, France, Canada, Germany, Spain, Italy, Türkiye, Brazil and 11 more. Country and city lists for research and development outsourcing providers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “research and development outsourcing providers”. 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 research and development outsourcing providers), 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 research and development outsourcing providers, 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, 152,395 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 between September 5, 2026 and September 14, 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.

Research and development outsourcing providers by location

28 lists · largest first

Every Research and development outsourcing providers 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 research and development outsourcing providers, 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 research and development outsourcing providers are there worldwide?

RevenueBase identified 3,986 research and development outsourcing providers 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?

Thermo Fisher Scientific, headquartered in Waltham, tops this list with the largest team on record.

Which country has the most research and development outsourcing providers?

The United States leads with 1,598 companies, followed by the United Kingdom (384) and India (364). Every research and development outsourcing providers list by country and city is linked on this page.

Which city has the most research and development outsourcing providers?

London leads with 85 headquartered companies, followed by San Diego (52) and Bangalore (44).

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 152,395 verified decision-maker contacts tracked across these 3,986 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 5, 2026 and September 14, 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.