Castor vs. Greenlight Guru Clinical
A side-by-side comparison based on G2 review data.
| Metric | Castor | Greenlight Guru Clinical |
|---|---|---|
| Overall rating | 4.6 | 4.2 |
| Review count | 126 | 129 |
| Ease of use | 9.4 | 9.0 |
| Ease of setup | 8.9 | 8.7 |
| Quality of support | 9.3 | 9.4 |
| Meets requirements | 9.3 | 8.5 |
| NPS | 75.2 | 44.96124 |
| Small Business | 48.4% | 66.4% |
| Mid-Market | 15.9% | 21.1% |
| Enterprise | 35.7% | 12.5% |
| Total page views | 332 | 178 |
| Total LLM citations | 2,196 | 590 |
Castor
Castor is a leading cloud-based clinical data platform designed to democratize research and streamline the complexities of decentralized, hybrid, and traditional clinical trials. Trusted by academic institutions, biotech, and pharmaceutical companies worldwide, Castor enables researchers to capture high-quality data and accelerate study timelines through a modular, human-centered ecosystem.
- Ease of Use
- Navigation Ease
- Data Management
- Design Ease
- Organization
- Setup Ease
Greenlight Guru Clinical
Greenlight Guru Clinical is the only electronic data capture (EDC) platform built specifically for medical device and diagnostic companies. While most EDC tools were designed for pharmaceutical trials and later adapted for medtech, Greenlight Guru Clinical starts where device teams actually work: under FDA, EU MDR, IVDR, and ISO 14155:2020 requirements, running studies that need to generate reliable clinical evidence for regulatory submissions and post-market obligations. The result is a platform that fits how device teams actually operate, rather than one they have to work around.
- Implementation Ease