Last updated · traffic data through Jun 2026 - refreshes automatically as new data lands.
119 English-language clinical trials websites in Site Stats Database. The top 12 by monthly traffic are below.
119
Websites
477,737,491
Combined monthly traffic
49
Median DR
2,089
Median keywords
16 yrs
Median domain age
Showing 12 of 119 results
107 more English-language clinical trials sites are hidden. Unlock the full list.
Site Stats Database tracks 119 English-language clinical trials websites. They carry a median Ahrefs Domain Rating of 49, higher than the 28 median across all tracked sites. The typical one is about 16 years old and ranks for 2,089 organic keywords. See plans and pricing.
Every figure here is based only on the 119 English-language clinical trials websites that Site Stats Database tracks, not the entire web.
Median DR
49
Median referring domains
834
Median keywords
2,089
Median domain age
16 yrs
Adoption by audience size
Share of the most-visited sites we track that are English-language clinical trials websites.
<0.1%
Top 10K
2 of 10,000
<0.1%
Top 100K
28 of 100,000
<0.1%
All tracked
119 of 880,858
Site Stats Database tracks 119 websites that are both Clinical Trials and English-language, each enriched with traffic, authority, and the full detected tech stack.
They tend to have stronger authority than the typical website: their median Ahrefs Domain Rating is 49, higher than the 28 median across all sites Site Stats Database tracks.
Traffic estimates, keywords, and authority come from DataForSEO; Domain Rating comes from Ahrefs' public endpoint; and the topic, market, and technology detections come from Site Stats Database's own crawler.
Yes. The complete, filterable list of all 119 English-language clinical trials websites, with traffic history, authority, keywords, and the full tech stack, is available with a Site Stats Database plan.
Citation
Site Stats Database. "Top English-Language Clinical Trials Websites." Site Stats Database, July 1, 2026. https://sitestatsdb.com/topics/clinical-trials/in/en
Site Stats Database tracks 119 English-language clinical trials websites, enriched with full monthly traffic history, authority, keywords, referring domains, and the complete detected tech stack. Everything refreshes at least monthly.
| English |
| 90 |
| 1,174,743 |
| 109,631 |
| 27 yrs |
| 19,356,993 |
| English |
| withpower.com | English | 66 | 115,356 | 2,183 | 16 yrs | 883,271 | English |
| massivebio.com | English | 55 | 100,894 | 2,163 | 10 yrs | 817,642 | English |
| healthmatch.io | English | 66 | 146,989 | 3,774 | 7 yrs | 726,460 | English |
| fredhutch.org | English | 79 | 45,622 | 16,570 | 21 yrs | 657,515 | English |
| oncolink.org | English | 75 | 65,238 | 6,752 | 31 yrs | 560,348 | English |
| oncodaily.com | English | 65 | 38,491 | 4,740 | 3 yrs | 507,025 | English |
| hoag.org | English | 69 | 27,743 | 3,260 | 31 yrs | 287,485 | English |
| ellevetsciences.com | English | 54 | 40,875 | 1,455 | 9 yrs | 278,331 | English |
| pbrc.edu | English | 68 | 7,267 | 3,246 | 33 yrs | 273,253 | English |
| morrisanimalfoundation.org | English | 73 | 19,035 | 4,176 | 29 yrs | 270,677 | English |