Company lists · Data refreshed September 2026
Top 25 Contract research organizations based in Houston, United States
RevenueBase identified 65 contract research organizations headquartered in Houston, United States as of September 2026 and tracks 1,974 professional contacts across them, including 419 with verified work emails. San Diego is the largest hub.
This list covers contract research organizations headquartered in Houston, 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 19, 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 contract research organizations based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 590 contacts → | ||||
Partial evidence “DM Clinical Research is a network of clinical trial investigator sites with headquarters based out of Houston, Texas.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 561 contacts → | ||||
Indirect evidence “Pharm-Olam is now Allucent.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 88 contacts → | ||||
Partial evidence “Biopharma Informatic is a Clinical Research Investigator Network which provides clinical trial management for interested Physicians, Medical Practices and Health Care Organization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 59 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 59 contacts → | ||||
Partial evidence “MedSource, now part of Ergomed, is an award-winning clinical research organization (CRO) that delivers high-quality clinical trials through strong relationships and specializes in…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 57 contacts → | ||||
Strong evidence “Avance Biosciences is a leading Contract Research Organization (CRO) and Contract Testing Organization (CTO) providing CGMP and GLP-compliant analytical and bioanalytical services…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 45 contacts → | ||||
Indirect evidence “Proxima CRO works with the new class of rising stars in drugs, devices, diagnostics and digital therapeutics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 37 contacts → | ||||
Partial evidence “Clinical Trial Network offers quality medical attention to the Houston area, while gathering data to generate industry-leading clinical research to pharmaceutical, bio-technology…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 27 contacts → | ||||
Indirect evidence “Labtopia is a technical services company providing staffing, consulting, training and informatics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 27 contacts → | ||||
Partial evidence “Pioneer Research Solutions, Inc.(PRS) was founded in 2007 with the idea of enlisting community physicians as a nationwide network to conduct clinical research.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 26 contacts → | ||||
Partial evidence “CEBIS, a full-service CRO headquartered in Houston, Texas, will provide a comprehensive integrated solution for clinical research (including start-up to CSR, phase I to IV)…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 20 contacts → | ||||
Partial evidence “OUR MISSION Renovatio Clinical delivers innovative treatment options to patients through clinical research and guarantees quick and efficient execution of clinical trial timelines…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 14 contacts → | ||||
Indirect evidence “Clinical trials often offer the best hope for many patients whose standard of care is failing.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 14 contacts → | ||||
Strong evidence “K2bio is a Preclinical Contract Research Organization (CRO) located in Houston Texas.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 11 contacts → | ||||
Indirect evidence “HGI Clinical is a relationship focused CRO with not only a wide range of therapeutic experience, but also experience with investigational product types, study designs and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 10 contacts → | ||||
Partial evidence “LSR is a research services firm supporting clinical product research and development.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Strong evidence “Trialwise is a woman-owned, boutique contract research organization (CRO) specializing in early phase clinical studies and niche consulting.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Partial evidence “Precision is the first global precision medicine clinical research services organization, purpose-built to improve the clinical research and development process for new…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Indirect evidence “At Accelsobio we understand that emerging Biotech & MedTech companies have unique needs, and one-size-fits-all solutions won't cut it.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Partial evidence “HERC), established in is an independent, multi-specialty research site that conducts clinical trials for major research pharmaceutical companies for new and approved medications…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “Your Dedicated Partner in Staffing Solutions Roger Trinh is a full-service employment firm that focuses on job placement in the life sciences and health industries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Indirect evidence “Our streamlined and organized processes allow us to perform rapid enrollment and fast startup while maintaining a high level of quality source data.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence “Aurora Pharmaceutical Consulting is a certified minority and woman-owned, small disadvantaged business located in Houston, TX.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Partial evidence “Introducing Etcetera BioProcess Services, LLC: Serving the biopharmaceutical, biotechnology, biologics and supporting industries by providing quality contract and consulting…” 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: contract 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 contract research organizations.
- Partial evidence
- Its own public description names part of contract research organizations, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name contract 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 65 contract research organizations based in Houston, United States
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Contract research organizations based in Houston, United States at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 65 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 contract 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 Houston, United States whose own description of what they do matches “contract 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 contract 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 contract research organizations, and records with no verified work email. Companies headquartered outside Houston 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, 419 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.
Contract research organizations by metro in the United States
- Contract research organizations in San Diego101
- Contract research organizations in New York93
- Contract research organizations in Boston87
- Contract research organizations in Houston65
- Contract research organizations in Miami62
- Contract research organizations in Raleigh56
- Contract research organizations in Princeton51
- Contract research organizations in Atlanta43
- Contract research organizations in Austin42
- Contract research organizations in Chicago42
- Contract research organizations in Cambridge41
- Contract research organizations in Durham37
- Contract research organizations in Philadelphia37
- Contract research organizations in San Francisco37
- Contract research organizations in Dallas28
- Contract research organizations in Wilmington28
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 contract 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 contract research organizations are there based in Houston, United States?
RevenueBase identified 65 contract research organizations headquartered in Houston, 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?
DM Clinical Research, headquartered in Houston, tops this list with the largest team on record.
Which city has the most contract research organizations?
San Diego leads with 101 headquartered companies, followed by New York (93) and Boston (87).
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 419 verified decision-maker contacts tracked across these 65 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.
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