| Adzon TV | Advertising – Waiting Room TV and Interactive Kiosk Ads | |
| Clinical Trial Media | Advertising / Media | |
| The Patient Recruiting Agency | Advertising / Media | |
| X-Factor Advertising | Advertising / Media | |
| Phone Screen | Call Center Services | |
| Hashimoto Consulting Services | Consulting | |
| Sherry Reuter, LLC | Consulting | |
| Trial Acceleration Institute | Consulting | |
| BBK | Full Service | |
| D. Anderson & Company | Full Service | |
| Healthcare Communications Group | Full Service | |
| MediciGroup | Full Service | |
| MMG | Full Service | |
| Needham & Co. | Full Service | |
| Praxis | Full Service | |
| Three Wire | Full Service | |
| Essential | Full Service / CRO | |
| INC Research | Full Service / CRO | |
| Kendle | Full Service / CRO | |
| Parexel | Full Service / CRO | |
| PPD | Full Service / CRO | |
| Quintiles | Full Service / CRO | |
| Fast4wd Ogilvy | Marketing / Communications | |
| Fleishman Hilliard | Marketing / Communications | |
| JL Shapiro Clinical Support Services | Marketing / Communications | |
| (Pi) Patient Interaction | Marketing / Communications | |
| QD Solutions | Marketing / Communications | |
| SMI Health | Marketing / Communications | |
| Vente | Market Research | |
| Accrual Solutions | Niche | |
| Acurian | Niche | |
| Ateb | Niche | |
| Crossover-cri | Niche | |
| ePharmaSolutions | Niche | |
| Clariness | Niche - EU Trial Networks | |
| Clinical Ambassador | Niche - Minority | |
| Inner City Medicine | Niche - Minority | |
| Innovative Clinical Concepts | Niche - Minority | |
| P&E Associates | Niche - Minority | |
| Dava Oncology | Niche - Oncology | |
| Patient Search | Niche - Patient Locator | |
| ForeWard - Customized Recruitment Newsletters | Niche - Patient Newsletters | |
| Diabetic Connect | Niche - Social Networking | |
| Inspire | Niche - Social Networking | |
| PatientsLikeMe | Niche - Social Networking | |
| Alliance Health Networks | Niche - Web Recruiting | |
| Enroll Patients | Niche - Web Recruiting | |
| Healogica Clinical Trials 2.0 | Niche - Web Recruiting / Trial Matching | |
| TrialX | Niche - Web Recruiting / Trial Matching | |
| EmergingMed | Niche - Web Recruiting / Trial Matching - Oncology | |
| Private Access | Niche - Web Recruiting / Trial Matching - Oncology | |
| CISCRP | Non-profit | |
| iTrials | Protocol feasibility analysis, site identification and pre-qualified patient identification | |
| Interspond | Retention | |
| Claire Driscoll & Associates | Screening / Call Center Services | |
| Life Line Screening | Screening | |
| PhoneScreen | Screening | |
| Health Market Science | Site Selection | |
| Enrollment Sciences, Inc. | Site Selection and Web Recruiting | |
| Accelere | Technology | |
| Clinical Connection | Technology | |
| Healogica Clinical Trials 2.0 | Technology | |
| TrialX | Technology | |
| Trialytics | Technology | |
| Trialytics | Technology - Data Mining and Modeling | |
| Greenphire | Technology - Electronic Communication Tools and Electronic Payment Technologies | |
| Interspond | Technology - Electronic Payment Technologies | |
| Accelere | Technology - EMR Data Mining and Matching | |
| CliniWorks AccelFind | Technology - EMR Data Mining and Matching | |
| Assured Consent / Human Research Technologies | Technology - Multimedia Informed Consent | |
| Consent Solutions | Technology - Multimedia Informed Consent | |
| RESolutions | Web Recruiting and Site Support |