Skip to main content

clinicaltrials.gov

clinicaltrials.gov had about 2.83M visits in September 2026, down 6.26% from August; most traffic is direct.

ClinicalTrials.gov

Website traffic

How much traffic does clinicaltrials.gov get?

2.83M

-6.26%MoMEstimated monthly visits
7893.47M2.31M1.16M0
Global rank

15,872

Country rank · United States

5,071

Category rank · Health

113

Average visit duration

04:14

Pages per visit

5.26

Bounce rate

47.28%

Domain age

27 years

Search share

31.3%

Sources

Where does clinicaltrials.gov's traffic come from?

  • Direct
    53.1%
  • Search
    31.3%
  • Referrals
    9.7%
  • Generative AI
    2.9%
  • Social
    1.7%
  • Email
    1.1%
  • Display ads
    0.2%
  • Paid search
    0.1%
  • Other
    0.0%

Regions

Which countries visit clinicaltrials.gov?

  • United States
    54.0%
  • China
    4.6%
  • India
    3.6%
  • United Kingdom
    3.1%
  • Canada
    2.6%

See how clinicaltrials.gov compares with the most visited websites in the world, the fastest growing websites and sites gaining organic search traffic.

Search visibility

What keywords send traffic to clinicaltrials.gov?

Keyword samples

Estimated visitsMonthly searchesVisits ÷ searches
  1. clinical trials govBRAND13.24K12.47K106%
  2. clinical trialsBRAND9.5K20.89K46%
  3. aether opinion surveys5.56K37.1K15%
  4. clinical trial govBRAND4.08K4.36K94%
  5. clinicaltrials.govBRAND2.39K1.51K158%

Keyword rankings

Keyword rankings

Example · google.comUnited States · English

86.4M

Search estimate

New 1 · Up 2

Ranking keywords
12,400
Landing pages
4
Search competitors
4
AI citations
2
PositionEstimated visits
  1. google#142M
  2. gmail#118.2M
  3. google maps#19.4M
  4. google drive#14.1M

Full keyword rankings are a Pro feature

Unlock Pro

Baidu rank

Site profile

What does clinicaltrials.gov show publicly?

  • HTTP 200
  • Email authentication
  • Hosting ASN
  • DNSSEC
HTTP
200
Page size
92.0 KiB
Hosting
GOOGLE-CLOUD-PLATFORM · AS396982
Email authentication
SPF · DMARC reject
TLS
TLSv1.3 · 154 days
Page and SEO
Title
ClinicalTrials.gov
Cross-origin redirect
No
Word count
22
Internal / external links
1 / 0
Language
en
H1 / H2
0 / 0
Images missing alt
0 / 0
OG / Twitter
Twitter
Technology and tracking
External script hosts
cdn.ncbi.nlm.nih.gov
Server
istio-envoy
Security headers
2 / 6
HSTS / CSP
HSTS
Alt-Svc
Set
Email and DNS securitySet
SPF
Set
DMARC
Set · reject
DKIM selectors
Not found
IPv6
AAAA present
DNSSEC
DNSKEY · AD
CAA issuers
godaddy.com · letsencrypt.org
Site verification TXT
Google
SOA
ns-cloud-d1.googledomains.com
NS
ns-cloud-d1.googledomains.com. · ns-cloud-d2.googledomains.com. · ns-cloud-d3.googledomains.com. · 1 more
MX
10 nihcesxway3.hub.nih.gov. · 10 nihcesxway4.hub.nih.gov. · 10 nihcesxway5.hub.nih.gov.
Hosting and networkAS396982
A
34.107.134.59
AAAA
2600:1901:0:c831::
Hosting ASN
AS396982 · 34.104.0.0/14
Hosting organization
GOOGLE-CLOUD-PLATFORM - Google LLC
Hosting country
US
BGP announcement
Yes
Reverse DNS
59.134.107.34.bc.googleusercontent.com
TLS
TLSv1.3 · Verified
Certificate issuer
GoDaddy TLS Intermediate CA DV - R1v1
Certificate remaining
154 days
Certificate SAN
DNS:*.clinicaltrials.gov · DNS:clinicaltrials.gov
robots and AI crawlingHTTP 200
Robots.txt
200
Global Disallow /
No
Sitemap
Index · 2
AI explicitly disallowed
0
AI explicitly allowed
16
Well-known public paths
Present / checked
0 / 5

Website information

When was clinicaltrials.gov registered?

Domain
clinicaltrials.gov
Registration status
Domain registered
Registered
2000-02-03
Registrar
get.gov
Expires
2027-08-18
Domain age
27 years
DNSSEC
Yes
Registry status
server transfer prohibited

Similar sites

What sites are similar to clinicaltrials.gov?

What's in this report

The report starts with a whole-site monthly visit estimate. Search visibility and public site facts follow when they exist.

  • Website traffic is a modeled whole-site estimate, with a source, observation period and confidence.
  • Search visibility is ranking keywords and search traffic, listed separately from whole-site visits.
  • Missing or partial values stay marked in the report.