Castor EDC vs Viedoc

Greenlight Guru Clinical

Medrio

OpenClinica

RedCap

ClinCapture

ddSuite

Compare Castor EDC and Viedoc based on features, pricing, verified reviews, integrations & more on GetApp. Find out which software is best for your business in 2026.

OpenClinica is a compliant, all-in-one clinical data management platform offering electronic data capture with collaborative drag and drop interface for designing studies, randomization and supply management, patient reported outcomes (ePRO & eCOA), plus reporting tools with chart visualizations

Greenlight Guru Clinical's electronic data capture is designed to help businesses in the medtech industry collect data from clinical investigations and post-market clinical follow-ups (PMCF). The platform offers predefined templates and QA files, which enable organizations to ensure compliance.

REDCap is a secure web application for building and managing online surveys and databases. It offers a wide range of features, including online or offline project design, secure and web-based data input, fast and flexible database creation, multi-site access, and fully customizable options. REDCap also provides advanced features such as branching logic, file uploading, and calculated fields, as well as regulatory compliance with standards like HIPAA and 21 CFR Part 11.

Castor is the leading EDC platform, letting researchers build studies in hours and seamlessly integrate EMR/EHR, ePRO, eCOA, and device data. With 90% of studies passing UAT in under four weeks, Castor accelerates research with no-code setup, real-time monitoring, and full regulatory compliance.

21 CFR Part 11 Compliance

Access Controls/Permissions

Activity Dashboard

Alerts/Notifications

Audit Management

Audit Trail

Clinical Study Management

Configurable Workflow

CRF Tracking

Customizable Branding

Customizable Fields

Customizable Forms

Customizable Reports

Customizable Templates

Data Capture and Transfer

Data Extraction

Data Import/Export

Data Storage Management

Data Synchronization

Data Verification

Data Visualization

Digital Signature

Distributed Capture

Document Classification

Document Imaging

Document Management

Document Storage

Drag & Drop

Electronic Data Capture

Electronic Signature

EMR/EHR

Enrollments/Onboarding

Forms Management

HIPAA Compliant

Metadata Management

Mobile Access

Monitoring

Multi-Language

Patient Management

Patient Monitoring

Progress Tracking

Randomization

Real-Time Data

Real-Time Monitoring

Real-Time Reporting

Reminders

Remote Data Capture

Reporting/Analytics

Role-Based Permissions

Secure Data Storage

Surveys & Feedback

Third-Party Integrations

Trial Design

User Management

Workflow Management

Castor EDC

Web-based

Sr CRA

Overall experience with Castor is extremely positive. I think the customer support has been great and I really enjoy the company.

Clinical Research Associate

Easy data download process, great interface, and very affordable compared to the other EDC systems out there.

Research Coordinator

Very positive and would definitely recommend if given the opportunity.

Patients manager

It offers a wide variety of tools to validate data entry. It's cost-effective and the fact that one can practice and customize and test before the "go live" is a great advantage.

Clinical Project Manager

The tool was easy to learn thanks to a few, short instructional tutorials and a great FAQ.

Clinical research coordinator

Very user friendly, easy access to online help (email), audit trail available, ease of uploading documents, data editing easily without having to unlock pages constantly.

PhD Candidate

Castor is very user friendly and I loved working with it.

PhD candidate

The structure is intuïtive, solid and runs smoothly which is very important for multicenter research. It helped me significantly in my work as project manager of an international multicenter RCT.

I enjoyed the great level of control when building forms, and even managed to do some coding - and to test that code to make sure it really worked.

There are a lot of features and I would not change anything. The Castor helpdesk was very helpful and responded very quickly when I needed help.

Bio Medical Engineer

The randomization is only in blocks and there is no other options for randomization which is a little problematic with a small group trials.

Program Director

Ease of setup, ease of use and overall has all the functionalities we need for clinical trials.

Clinical Research Assistant

For advanced users, there is no accessibility to more powerfull programming to manipulate the platform. The image/file upload feature is very restricted in file size.

Some building blocks are a bit limited in how they can be used. For example, some can't be set as "required", so one has to create additional fields to achieve the same result.

Overall the system is good, it does it's job and worth the cost. I think simplifying the building proccess and making repeated measures display a bit more informative would be better.

Clinical Research Director

The stats page doesn't allow scrolling, which means I often loose half the information. User experience of using the system across different smart phones is variable.

Castor EDC screenshot: Study Dashboard Overview—Track site activity, participant records, and visit completion with real-time graphs and metrics. Easily monitor progress and trends across all study sites.

Castor EDC screenshot: Visual Body Assessment Entry—Capture precise clinical observations using visual body diagrams. Integrate SDV-ready forms with structured, image-based assessments for accurate data entry.

Castor EDC screenshot: Participant Management View—Access a complete overview of participant status, progress, and randomization. Quickly sort, filter, and manage data across all subjects and visits.

Castor EDC screenshot: SDV Dashboard (Verification Tab)—Monitor SDV completion by site and field in a visual dashboard. Track pending and verified data to ensure quality and compliance at a glance.

Castor EDC screenshot: Query Tracking and Resolution—Stay on top of queries with real-time stats by site and status. Visualize pending issues and quickly identify the most queried forms for fast action.

Castor EDC screenshot: Randomization Overview—View randomization breakdowns per site and treatment group. The dashboard offers insights into arm allocation and monthly enrollment trends.

Freelancers

Large Enterprises

Mid Size Business

Non Profit

Public Administrations

Small Business

Medrio is an electronic data capture (EDC) tool for clinical research teams with tools for capturing, storing, analyzing, & managing patient data during clinical trials. Medrio offers secure storage of patient data, automates regulatory compliance management & allows users to build custom studies.

Captivate® is the most intuitive and flexible eClinical tool on the market today. Request a demo to see the no code EDC!

ddSuite software from DDC Schweiz allows object data of large infrastructure objects to be viewed from the overall view down to the smallest detail, managed and orders and invoices to be triggered.

Viedoc delivers powerful eClinical solutions that streamline clinical trials, making data collection, management, and analysis faster and easier. Trusted in 75+ countries, powering 7,000+ studies with more than 1.6M+ participants.

Double Data Entry

Financial Management

Inventory Management

Patient Recruiting

Reporting & Statistics

Scheduling

Web Forms

Viedoc

However, they were delighted with Viedoc and their flexibility. In addition, we build the database ourselves and it is easy to build with modern tools and super flexible to customize.

We have used Viedoc for a number of trials and we are very pleased with the ease of use and great functionalities. New, great features are implemented frequently.

Senior Director Clinical Operations

Viedoc is a very innovative company that is constantly improving and adding new modules. Yet, throughout the years, Viedoc has never stopped taking good care of us.

Chief Operating Officer

Sites are happy, nice for stats in safety and monitoring; easy to use without manuals; manuals helpul if needed.

Client Lead

Excellent customer service/support and a great value for the product.

Clinical Data Manager

All in all, Viedoc is my favorite EDC system. I work with several systems and now have a good comparison.

Biometrics Project Manager

The thing that it is not possible to link Concomitant Medications to Medical History and/or Adverse Event is a big downside. This is one of the features that I have missed the most.

Project manager

It is fairly easy to work with, user friendly once you get used to the structure of it. Very helpful team during study build.

Student

Great tool for handling large research or clinical projects where data entry is a crucial part. Video tutorials are also available wich is very helpful.

Solid technology, easy to use, great customer care.

Excellent cost/quality rate, is easy to use for sites and designers can customize the forms to match all study requirements.

Director of Clinical Data Management

At first we were looking for a system for a phase 1 study with a small budget, but then we were so happy with the system that we decided to use it for larger studies.

Associate Director, Biometrics

New version updates with added functionality. I believe there is inadequate training associated with this.

Clinical Data Group Leader

Lack of on line reporting (only some metrics are available).

Director Clinical Operations

Viedoc is very easy to use and it fulfills all the necessary criteria needed for data capture in clinical trials. It enables integration with other systems when needed.

Head of Data Management

Viedoc seamlessly integrates EDC, ePRO, and RTMS into a unified, intuitive platform, for clinical trial management.

So far Viedoc is serving very well. It has become a very unique and useful tool.

Clinical Research Manager

I'm impatient to discover the next features to be released with the next up-grades of Viedoc 4 (such as possibility to generate the monitoring reports on the system).

Castor EDC vs Viedoc Comparison (2026)

Castor EDC

Viedoc

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives