Patient Recruitment Companies for Clinical Trials in 2026: Large-Scale Providers vs. Boutique Specialists

Patient recruitment providers cover a wide size range, from enterprise site networks with thousands of employees and access to tens of millions of patients, to boutique agencies of a handful of people running highly targeted campaigns for a single region or therapeutic niche. This kind of trial recruitment vendor scales differently depending on size: larger providers typically lean on owned clinical site networks, centralized technology platforms, and integrated healthcare system partnerships, while boutique specialists tend to compete on personalized service, a specific geography, or a distinctive technology angle they've built in-house.

The companies below are grouped by size and listed in no particular order within each group. Between them, these companies and providers cover owned research site networks, EHR-integrated recruitment technology, decentralized trial platforms, and single-market or boutique recruitment agencies.

Large-Scale Providers

CenExel Clinical Research

CenExel Clinical Research operates a national network of Centers of Excellence — 15 clinical research sites as of its most recent expansion — each staffed by Principal Investigator physicians with deep experience in specific therapeutic areas including psychiatry, neurology, and vaccines. The Atlanta-based company was formed in 2018 and has grown through acquisitions such as its 2022 purchase of iResearch, a CNS-focused research facility in Georgia with a 40-bed inpatient unit. CenExel's site network spans Phase I–IV studies and has supported more than 200 clinical trials at individual centers alone. The company positions its distributed, multi-site model as a way to consistently meet sponsor enrollment targets across a range of geographies.

Trialmed

Trialmed, formerly known as Accelerated Enrollment Solutions and before that tied to PPD, Synexus, and Optimal, builds its patient recruitment strategy on data and modeling drawn directly from prior enrollment patterns for a given patient type. Based in Horsham, Pennsylvania, the company offers home trial services that bring visits to a patient's home, office, or school, extending its reach to communities outside a site's typical recruitment radius. Trialmed supports its recruitment work with a dedicated medical information contact center covering the “last mile” from initial patient contact through screening and enrollment. The company's scale traces to its origins as part of PPD, one of the industry's larger contract research organizations, before taking its current standalone form.

Evolution Research Group

Evolution Research Group (ERG) operates a portfolio of ten owned research sites across the US — including Woodland International Research Group, Brain Matters Research, and Finger Lakes Clinical Research — that together the company says provide access to more than 32 million patients and have completed over 5,000 clinical trials. Founded in 2014 and headquartered in New Providence, New Jersey, ERG centralizes patient recruitment, budgeting, and technology operations across its site network while maintaining specialized therapeutic area portfolios in psychiatry, neurology, and pain. The company has continued to expand through acquisitions, including Lotus Clinical Research in 2021 and a 2019 partnership with imaging biomarker firm Invicro. ERG reports a database of more than 215,000 patients supported by a centralized recruitment and marketing team alongside local community outreach programs.

Elligo Health Research

Elligo Health Research describes itself as the largest healthcare-enabling research organization, drawing on direct access to patients across more than 115 hospitals and major health systems, 200 healthcare-based sites, and 100 research-based sites. The Austin, Texas-based company built its own IntElligo technology to identify eligible patients from electronic health record data, and pairs it with a PatientSelect model that embeds research into routine physician care rather than running trials only at standalone sites. In 2018, Elligo acquired ePatientFinder's clinical trial exchange technology and referring practice network to expand its automated patient-matching capabilities. The company also operates its own clinical research centers, including one in Austin it expanded to three times its original size in 2023.

Javara

Javara operates as what it calls an Integrated Research Organization, embedding clinical trial infrastructure and staff directly inside large healthcare systems so patients can access trials through their existing physician rather than a separate research site. Founded in 2018 by Jennifer Byrne and based in Winston-Salem, North Carolina, the company's health system partnerships include a multi-year agreement with Wake Forest Baptist Health covering 24 counties. Javara secured a Series C growth investment in 2025 to expand into oncology, CNS, and neurology, building on a model it says has reached more than 5 million patients across its partner health systems. The company centralizes its recruitment resources and standardized operations across its network to accelerate study start-up for sponsors.

Boutique Specialists

Curebase

Curebase built its reputation as a decentralized clinical trial software platform before adding Omnisite, a flexible site model launched in 2023 that lets sponsors recruit and enroll patients from home or real-world medical settings rather than a fixed location. Founded in San Francisco in 2017 by CEO Tom Lemberg, the company narrowed its focus from full clinical operations services to specialize primarily in its eClinical software after early growth. A 2022 partnership with BEKHealth added AI-powered EMR-based patient matching to Curebase's decentralized recruitment toolkit, aimed at reaching patient populations a traditional site wouldn't otherwise access. Curebase has operated components of its remote recruitment model in all 50 US states.

Praxis Communications

Praxis Communications operates as the dedicated patient recruitment division of Crowley Webb, a Buffalo, New York advertising agency with more than 35 years of experience, giving the boutique team access to creative and media-buying resources larger standalone recruitment firms often build in-house. Founded in 2002, Praxis built its own proprietary software, PraxisDirect, to track inquiry volumes, screen-failure reasons, and enrollment projections for each recruitment campaign it runs. The company received a 2023 APEX Award for a diversity-in-clinical-trials video produced in collaboration with Eli Lilly, Otsuka, and the nonprofit CISCRP. Praxis has supported patient recruitment campaigns for clinical trials for more than two decades from its single Buffalo office.

StudyPages

StudyPages runs a workflow platform originally launched by Yuzu Labs in 2014, aimed at replacing the spreadsheets and email threads study teams have traditionally used to track site operations, recruitment campaigns, and enrollment progress. Based in San Jose, California, the company has since added AI features intended to speed up patient recruitment and flag site performance issues from a single dashboard shared by sponsors, CROs, and sites. StudyPages says its platform has been referenced in more than 15 peer-reviewed research publications documenting its role in participant recruitment and study management. The company positions itself as a technology layer that consolidates recruitment, consent, and data collection tools rather than running outreach campaigns of its own.

Patient Enrollment Advisors

Patient Enrollment Advisors is a small, Miami-based firm built around more than 30 years of combined marketing and media experience among its team, applying that background to patient-focused recruitment strategies for clinical trials, pharmaceutical launches, and senior-living facilities alike. Founded in 2015, the company positions itself around one-to-one patient engagement rather than large-scale digital advertising campaigns, aiming to reach patients through more personalized outreach. Patient Enrollment Advisors pairs this approach with what it describes as a blend of AI-assisted digital tools and direct human engagement for both recruitment and long-term patient retention. The firm serves sponsors across multiple healthcare service categories beyond clinical trials specifically, including medical devices and general healthcare marketing.

FindMyClinicalTrial

FindMyClinicalTrial (FMCT) focuses specifically on the DC, Maryland, and Virginia region, connecting patients, hospitals, and research sites through a software platform aimed at improving both enrollment volume and participant diversity in that market. The Washington, DC-based startup entered a know-how agreement with Mayo Clinic to continue developing its clinical trial platform technology. FMCT's approach centers on engaging a network of regional stakeholders and partners rather than running broad national advertising campaigns, reflecting its focus on a single metropolitan market. The company positions its software as a tool CROs and research sites can use directly to manage patient identification and intake within its home region.

Explore the full Patient Recruitment landscape

The companies above represent a portion of a much larger field.

Diligent's platform includes over 730 Patient Recruitment Vendors, with Vendor qualification data available on demand. Book a demo to see the vendors and qualification reports available on the platform.

This article is intended as an informational overview of vendors operating in this space. Inclusion on this list does not constitute an endorsement, recommendation, or qualification by Diligent.