6 eISF & eRegulatory Providers for Clinical Trials in 2026

Every investigator running a clinical trial has to maintain a site-level record of essential documents — IRB approvals, signed protocols, delegation logs, training records — that proves the study was conducted according to GCP. Traditionally that meant physical binders. An investigator site file management provider replaces those binders with an electronic ISF, giving sites, sponsors, and monitors real-time access to the same documents without anyone shipping a binder or flying in for an on-site visit.

The companies on this list offer electronic investigator site file (eISF) or eRegulatory management for clinical trials. This is an unranked list — the order carries no judgment about quality or fit. One entry, Phlexglobal, is included for its closely related Trial Master File (TMF) work rather than site-level ISF specifically — the two document sets mirror each other closely, but it's worth knowing the distinction going in.

Complion

Complion pioneered eReg/eISF technology more than a decade ago and today manages over 20,000 electronic Investigator Site Files for roughly 22,000 principal investigators across 50 countries. Its ISF Connect functionality automates regulatory compliance based on the investigator, study, and integrated systems in use, giving sponsors and CROs remote ISF review and live site monitoring without an in-person visit. Founded in 2013 by Rick Arlow, a physician-scientist frustrated by paper binders during his own research training, Complion is based in Cleveland, Ohio.

Florence Healthcare

Florence Healthcare's Site Enablement Platform connects more than 18,000 investigator sites across 55 countries, and its eBinders eISF solution is rated the #1 eISF platform on G2 for ease of use, setup, and customer support. The platform syncs directly with a sponsor's eTMF, letting sites and sponsors exchange regulatory documents in real time rather than mailing, emailing, or faxing them, and the company reports a 92% site adoption rate. Founded in 2014 and based in Atlanta, Georgia, Florence partnered with WCG in 2023 to link its eBinders with WCG's ClinTech platform, streamlining the flow of IRB, training, and safety documents into a site's eISF.

Docutrial

Docutrial offers a single sign-on platform covering eSource, ISF, eReg, CTMS, and EDC, letting clinical sites adopt only the modules they need while moving away from paper or disconnected electronic systems. The platform was developed by Dr. William Dirkes, a board-certified anesthesiologist who also leads Sentral Clinical Research Services, after running physician-office research sites in Cincinnati himself. Founded in 2010 and based in Cincinnati, Ohio, Docutrial reports more than 150 studies conducted on its platform without a sponsor rejection.

Clinical.ly

Clinical.ly builds clinical research software that organizes eRegulatory binders, tracks essential documents, and manages electronic delegation and training logs for research sites. The company works directly with clinical trial facilities to integrate their existing workflows into its platform, aiming to reduce study initiation time and enable remote monitoring without disrupting how a site already operates. Founded in 2019, Clinical.ly is based in New York, New York.

Velionyx

Velionyx offers eRegulatory binders alongside EHR-enabled patient recruitment and feasibility, EHR-to-EDC connector apps, biomarker lab services, and IxRS, positioning its ISF work as one piece of an integrated, compliant study workflow. The company's approach bundles site document management with the broader data and recruitment tools a site needs, reducing the number of separate vendors a sponsor has to coordinate. Founded in 1998 and based in Milan, Italy, Velionyx serves clinical research organizations across multiple European markets.

Phlexglobal

Phlexglobal is the recognized authority in Trial Master File (TMF) services and technology rather than a site-level ISF specialist, supporting hundreds of sponsor and CRO companies through more than 150 dedicated TMF experts. Its PhlexTMF platform is positioned as the industry's first AI-powered eTMF, aiming to reduce document misfiles and metadata errors from the point of upload, and the company also offers embedded study owners and expert quality review services. Founded in 1997 and based in Malvern, Pennsylvania, Phlexglobal now operates as a PharmaLex company under Cencora, giving it access to a much larger regulatory and pharmacovigilance organization.

Explore the full eISF landscape

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

Diligent's platform includes over 170 Investigator Site File Vendors, many with Vendor qualification data available on demand. Book a demo to explore Diligent's full vendor discovery database.

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.