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# Castor vs Greenlight Guru Clinical Comparison - What are their main differences?

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CastorGreenlight Guru Clinical[+ Add Product](#)

Pricing

**Castor**
Free Trial

**Contact Vendor for Pricing** Per Year · Basic

**Greenlight Guru Clinical**
Free Trial

**Contact Vendor for Pricing** Other Per Month · Basic

**Pricing Insights**
from reviews

Perceived Cost

**Castor**
$$$$$

**Greenlight Guru Clinical**
$$$$$

Average Discount

**Castor**
15%3% more

**Greenlight Guru Clinical**
12%

Uncover valuable pricing insights from real user feedback to improve your shopping experience.
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Time to Implement

**Castor** 6 months
Based on 100 responses

**Greenlight Guru Clinical** 6 months
Based on 100 responses

Return on Investment

**Castor** 6 months
Based on 100 responses

**Greenlight Guru Clinical** 6 months
Based on 100 responses

**Pros & Cons**
from reviews

**Castor**

Ease of Use (5)

Navigation Ease (3)

Data Management Issues (1)

Inadequate Reporting (1)

**Greenlight Guru Clinical**

Implementation Ease (1)

Limitations (1)

Missing Features (1)

Integrations

**Castor**
[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_ea13fbd97f50d6ec5f429af453ac9657/clinical-trials-platform.png "Product Avatar Image")

Clinical Trials Platform

](https://www.g2.com/products/clinical-trials-platform/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/vendor/image/2002692/large_detail_84027133765711be5bfce147da9a3674.png "Product Avatar Image")

eCRF

](https://www.g2.com/products/ecrf/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/vendor/image/2011181/large_detail_863475f623a89a576d36a0d8c6c58298.png "Product Avatar Image")

EPRO

](https://www.g2.com/products/epro/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_bcc365ddaab7e0a6cb45a76c84437a4b/medisys.jpg "Product Avatar Image")

MediSYS

](https://www.g2.com/products/medisys/reviews)[
View all
](https://www.g2.com/products/castor-edc-castor/integrations)

**Greenlight Guru Clinical**
[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_6c570615859910ad6136088819283cad/bsi-ctms.png "Product Avatar Image")

BSI CTMS

](https://www.g2.com/products/bsi-ctms/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/vendor/image/11172/large_detail_42f65eed8574ab0be2e7654b4214f4db.jpg "Product Avatar Image")

BSI eTMF

](https://www.g2.com/products/bsi-etmf/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_e369fa2434bfed6434dea757dc661c25/chatgpt.jpg "Product Avatar Image")

ChatGPT

](https://www.g2.com/products/chatgpt/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_5a70c0e0f26ded6f6c6813e514d2fa20/claude.png "Product Avatar Image")

Claude

](https://www.g2.com/products/claude/reviews)[
View all
](https://www.g2.com/products/greenlight-guru-clinical/integrations)

Screenshots

**Castor**
 ![Castor screenshot](https://images.g2crowd.com/cdn-cgi/image/width=600,height=600,fit=scale-down,format=auto,onerror=redirect,/https://images.g2crowd.com/uploads/attachment/file/106071/User-management.png)

**Greenlight Guru Clinical**
 ![Greenlight Guru Clinical screenshot](https://images.g2crowd.com/cdn-cgi/image/width=600,height=600,fit=scale-down,format=auto,onerror=redirect,/https://images.g2crowd.com/uploads/attachment/file/1840190/1_EDC.png)

**Ratings**
from reviews

Meets Requirements

**Castor**

**9.1** /10

Based on 113 responses

**Greenlight Guru Clinical**

**8.2** /10

Based on 121 responses

Ease of Use

**Castor**

**9.3** /10

Based on 116 responses

**Greenlight Guru Clinical**

**8.9** /10

Based on 123 responses

Ease of Setup

**Castor**

**8.8** /10

Based on 42 responses

**Greenlight Guru Clinical**

**8.5** /10

Based on 89 responses

Ease of Admin

**Castor**

**9.3** /10

Based on 32 responses

**Greenlight Guru Clinical**

**8.7** /10

Based on 58 responses

Quality of Support

**Castor**

**9.2** /10

Based on 100 responses

**Greenlight Guru Clinical**

**9.3** /10

Based on 114 responses

Has the product been a good partner in doing business?

**Castor**

**9.3** /10

Based on 30 responses

**Greenlight Guru Clinical**

**9.3** /10

Based on 56 responses

Product Direction (% positive)

**Castor**

**9.5** /10

Based on 115 responses

**Greenlight Guru Clinical**

**8.6** /10

Based on 119 responses

**Features**
ratings from reviews

Electronic Data Capture (EDC)

**9.1** /10

Based on 97 responses

**8.4** /10

Based on 124 responses

User Insights

**Reviewers' Company Size**

Small-Business(50 or fewer emp.)
48.8%

Mid-Market(51-1000 emp.)
16.0%

Enterprise(\> 1000 emp.)
35.2%

Small-Business(50 or fewer emp.)
48.8%

Mid-Market(51-1000 emp.)
16.0%

Enterprise(\> 1000 emp.)
35.2%

Small-Business(50 or fewer emp.)
66.4%

Mid-Market(51-1000 emp.)
21.1%

Enterprise(\> 1000 emp.)
12.5%

Small-Business(50 or fewer emp.)
66.4%

Mid-Market(51-1000 emp.)
21.1%

Enterprise(\> 1000 emp.)
12.5%

**Reviewers' Industry**

[![Castor](https://images.g2crowd.com/uploads/product/hd_favicon/ab11d0324c2443e077f112dc56c6baec/castor-edc-castor.svg "Castor")](https://www.g2.com/products/castor-edc-castor/reviews)
Castor

Hospital & Health Care
48.0%

Research
20.8%

Medical Practice
12.0%

Health, Wellness and Fitness
6.4%

Medical Devices
4.0%

Other
8.8%

[![Greenlight Guru Clinical](https://images.g2crowd.com/uploads/product/hd_favicon/25b89f47d9cc3847f8dccc3eda901e39/greenlight-guru-clinical.svg "Greenlight Guru Clinical")](https://www.g2.com/products/greenlight-guru-clinical/reviews)
Greenlight Guru Clinical

Medical Devices
42.1%

Research
22.2%

Hospital & Health Care
18.3%

Medical Practice
3.2%

Health, Wellness and Fitness
3.2%

Other
11.1%

Alternatives

**Castor Alternatives**

 ![Medrio EDC](https://images.g2crowd.com/uploads/product/hd_favicon/65b270652651004e977e058dea2fb67d/medrio-edc.svg "Medrio EDC")

[
Medrio EDC
](/products/medrio-edc/reviews)

 ![REDCap](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_3a325ce0a148d1e1484014bf7b006b5d/redcap.png "REDCap")

[
REDCap
](/products/redcap/reviews)

 ![OpenClinica](https://images.g2crowd.com/uploads/product/hd_favicon/1499354460/openclinica.svg "OpenClinica")

[
OpenClinica
](/products/openclinica/reviews)

 ![Medidata Rave](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_e3df70a10924796673ee70bf62a92dda/medidata-rave.jpg "Medidata Rave")

[
Medidata Rave
](/products/medidata-rave/reviews)

**Greenlight Guru Clinical Alternatives**

 ![Viedoc](https://images.g2crowd.com/uploads/product/hd_favicon/10deb15544ce14a0f7747ee8ff8e0cdb/viedoc.svg "Viedoc")

[
Viedoc
](/products/viedoc/reviews)

 ![Medrio EDC](https://images.g2crowd.com/uploads/product/hd_favicon/65b270652651004e977e058dea2fb67d/medrio-edc.svg "Medrio EDC")

[
Medrio EDC
](/products/medrio-edc/reviews)

 ![REDCap](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_3a325ce0a148d1e1484014bf7b006b5d/redcap.png "REDCap")

[
REDCap
](/products/redcap/reviews)

 ![Clinical Research Suite](https://images.g2crowd.com/uploads/product/hd_favicon/e340cf2d8162c8c01e4f2d519c48c10b/clinical-research-suite.svg "Clinical Research Suite")

[
Clinical Research Suite
](/products/clinical-research-suite/reviews)

## Castor vs Greenlight Guru Clinical

When assessing the two solutions, reviewers found Castor easier to use, set up, and administer. However, reviewers felt that both vendors make it equally easy to do business overall.

- Reviewers felt that Castor meets the needs of their business better than Greenlight Guru Clinical.
- When comparing quality of ongoing product support, reviewers felt that Greenlight Guru Clinical is the preferred option.
- For feature updates and roadmaps, our reviewers preferred the direction of Castor over Greenlight Guru Clinical.