Company lists · Data refreshed September 2026

Top 25 Clinical trial research organizations based in Switzerland

Name: Clinical trial research organizations based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 102 companies tracked

RevenueBase identified 102 clinical trial research organizations headquartered in Switzerland as of September 2026 and tracks 4,559 professional contacts across them, including 2,552 with verified work emails. Basel is the largest hub.

This list covers clinical trial research organizations headquartered in Switzerland, 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 16, 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 16, 2026 86% judged on-target in blind review

102Companies

4,559Contacts tracked

2,552Verified emails

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The 25 largest clinical trial research organizations based in Switzerland

Ranked by team size

Top 25 of 102 clinical trial research organizations based in Switzerland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to clinical trial research organizations: 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	PSI CRO	Partial evidence	Zug, SwitzerlandHQ checked Sep 16, 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 16, 2026
2	Solvias	Indirect evidence	Kaiseraugst, SwitzerlandHQ checked Sep 16, 2026	501-1,000	683 contacts →
	Indirect evidence “Solvias helps innovative companies advance their path to commercialization with CMC analytical solutions powered by deep scientific expertise and a relentless focus on our…” Source: RevenueBase Database · checked Sep 16, 2026
3	Accelsiors CRO	Strong evidence	Baar, SwitzerlandHQ checked Sep 16, 2026	201-500	196 contacts →
	Strong evidence “Accelsiors is an end-to-end clinical research organization that has empowered biopharmaceutical companies for over two decades.” Source: RevenueBase Database · checked Sep 16, 2026
4	Anapath Services Gmbh & Anapath Research S.A.U	Partial evidence	Liestal, SwitzerlandHQ checked Sep 16, 2026	51-200	95 contacts →
	Partial evidence “AnaPath, is a global company including contract research organization (CRO) and pathology services that provides R&D services in the preclinical and bioanalytical fields.” Source: RevenueBase Database · checked Sep 16, 2026
5	Spirochem	Partial evidence	Basel, SwitzerlandHQ checked Sep 16, 2026	51-200	77 contacts →
	Partial evidence “SpiroChem is a pioneering research partner providing innovative solutions across the drug discovery and process R&D chemistry value chain.” Source: RevenueBase Database · checked Sep 16, 2026
6	AO Research Institute Davos ARI	Partial evidence	Davos, SwitzerlandHQ checked Sep 16, 2026	51-200	75 contacts →
	Partial evidence “Established 1959, AO Research Institute Davos (ARI) aims to: • Contribute to high quality applied preclinical research and development (exploratory and translational) focused…” Source: RevenueBase Database · checked Sep 16, 2026
7	Retinai	Strong evidence	Bern, SwitzerlandHQ checked Sep 16, 2026	11-50	42 contacts →
	Strong evidence “RetinAI is a Swiss & US-based software company improving and supporting R&D of first-in-human drug candidates, supercharging management and oversight of clinical trials and…” Source: RevenueBase Database · checked Sep 16, 2026
8	Milestone ONE	Strong evidence	Zug, SwitzerlandHQ checked Sep 16, 2026	51-200	39 contacts →
	Strong evidence “Running clinical trials feels insurmountable for the average hospital, clinic, or practice.” Source: RevenueBase Database · checked Sep 16, 2026
9	Wemedoo AG	Strong evidence	Steinhausen, SwitzerlandHQ checked Sep 16, 2026	11-50	36 contacts →
	Strong evidence “Wemedoo is a clinical technology company built on deep clinical research expertise.” Source: RevenueBase Database · checked Sep 16, 2026
10	Swiss Bioquant AG	Partial evidence	Reinach, SwitzerlandHQ checked Sep 16, 2026	11-50	34 contacts →
	Partial evidence “Swiss BioQuant is a bioanalytical contract research organization (CRO) specialized in LC-MS/MS and ligand-binding assays and dedicated to scientific excellence.” Source: RevenueBase Database · checked Sep 16, 2026
11	Five Office LTD	Indirect evidence	Wetzikon (zürich), SwitzerlandHQ checked Sep 16, 2026	51-200	31 contacts →
	Indirect evidence “Five Office Ltd is a service provider based in Switzerland and operating worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
12	HEMEX	Strong evidence	Liestal, SwitzerlandHQ checked Sep 16, 2026	11-50	23 contacts →
	Strong evidence “HEMEX is a European Contract Research Organization (CRO) supporting pharmaceutical, biotech, and medtech SMEs with end-to-end clinical development solutions.” Source: RevenueBase Database · checked Sep 16, 2026
13	B'sys Gmbh	Partial evidence	Witterswil, SwitzerlandHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “Business As a contract research organization (CRO) B‘SYS provides assistance to pharmaceutical settings in Ion Channel Discovery.” Source: RevenueBase Database · checked Sep 16, 2026
14	Cross Alliance	Partial evidence	Mendrisio, SwitzerlandHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “CROss Alliance® is a regional, family-owned clinical CRO based in Canton Ticino, Switzerland, operating since 1996.” Source: RevenueBase Database · checked Sep 16, 2026
15	Rede Optimus	Strong evidence	Cham, SwitzerlandHQ checked Sep 16, 2026	11-50	15 contacts →
	Strong evidence “Rede Optimus is a global clinical research organization (CRO) specialized in medical device trials, dedicated to answering key clinical questions and advancing evidence-based…” Source: RevenueBase Database · checked Sep 16, 2026
16	Division Of Clinical Epidemiology	Strong evidence	Basel, SwitzerlandHQ checked Sep 16, 2026	11-50	15 contacts →
	Strong evidence “The Division of Clinical Epidemiology strives to improve clinical research in order to generate high-quality evidence for decision-making in health care and social programs.” Source: RevenueBase Database · checked Sep 16, 2026
17	Swiss Clinical Trial Organisation	Strong evidence	Bern, SwitzerlandHQ checked Sep 16, 2026	1-10	13 contacts →
	Strong evidence “The Swiss Clinical Trial Organisation (SCTO) is a research infrastructure of national importance and an academic reference institution for high-quality, patient-oriented clinical…” Source: RevenueBase Database · checked Sep 16, 2026
18	Ariadne.ai AG	Partial evidence	Buchrain, SwitzerlandHQ checked Sep 16, 2026	11-50	13 contacts →
	Partial evidence “ariadne.ai is the technology leader in brain spatial biology data analysis, helping researchers decode the complexities of the brain at single-cell resolution.” Source: RevenueBase Database · checked Sep 16, 2026
19	Microbe Investigations Switzerland MIS	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “Microbe Investigations Switzerland (MIS) is a premier Contract Research Organization dedicated to evaluating the efficacy of products across various sectors against pests…” Source: RevenueBase Database · checked Sep 16, 2026
20	Adr-Ac Gmbh	Indirect evidence	3008 Bern, SwitzerlandHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “The Company was founded by Prof.” Source: RevenueBase Database · checked Sep 16, 2026
21	Kielo Research	Partial evidence	Zug, SwitzerlandHQ checked Sep 16, 2026	1-10	10 contacts →
	Partial evidence “Patient-centered research services, such as patient preference studies, benefit-risk assessment, multi-criteria decision analysis (MCDA), training and strategy advice.” Source: RevenueBase Database · checked Sep 16, 2026
22	Medical Trials Analysis	Strong evidence	Lugano, SwitzerlandHQ checked Sep 16, 2026	11-50	10 contacts →
	Strong evidence “Medical Trials Analysis (MTA) Group is a comprehensive CRO providing a full range of services for clinical trials, clinical research and medical education linked to clinical…” Source: RevenueBase Database · checked Sep 16, 2026
23	ancora.ai	Strong evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	1-10	9 contacts →
	Strong evidence “Our vision at Ancora.ai is that all cancer patients have access to clinical research as a care option.” Source: RevenueBase Database · checked Sep 16, 2026
24	Luzsana Biotechnology Europe AG	Indirect evidence	Basel, SwitzerlandHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
25	Medidee	Indirect evidence	Lausanne, SwitzerlandHQ checked Sep 16, 2026	51-200	7 contacts →
	Indirect evidence “Veranex helps you with concept through to commercialization by enabling: • Accelerated speed to market • Controlled development costs • Development risk mitigation • Market…” Source: RevenueBase Database · checked Sep 16, 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: clinical trial research organizations. 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 clinical trial research organizations.
Partial evidence: Its own public description names part of clinical trial research organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clinical trial research organizations. 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 102 clinical trial research organizations based in Switzerland

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Clinical trial research organizations based in Switzerland at a glance

As of Sep 16, 2026

56.0%Verified-email coverage

44.7Average contacts per company

11-50Median size (employees)

17.6%Largest-city concentration · Basel

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 102 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 clinical trial research organizations, 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 Switzerland whose own description of what they do matches “clinical trial research organizations”. 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 clinical trial research organizations), 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 clinical trial research organizations, and records with no verified work email. Companies headquartered outside Switzerland 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, 2,552 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 16, 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 clinical trial research organizations, 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 clinical trial research organizations are there based in Switzerland?

RevenueBase identified 102 clinical trial research organizations headquartered in Switzerland 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?

PSI CRO, headquartered in Zug, tops this list with the largest team on record.

Which city has the most clinical trial research organizations?

Basel leads with 18 headquartered companies, followed by Zug (7) and Bern (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 2,552 verified decision-maker contacts tracked across these 102 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 16, 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.