Is Hellenic Academic and Research Institutions CA or Internet2 more popular?

Hellenic Academic and Research Institutions CA is used by more websites in our catalog: 1,161 use Hellenic Academic and Research Institutions CA and 978 use Internet2.

Does Hellenic Academic and Research Institutions CA or Internet2 have higher-authority sites?

Internet2 sites have the higher median Ahrefs Domain Rating (Hellenic Academic and Research Institutions CA: 75, Internet2: 76).

Is Hellenic Academic and Research Institutions CA or Internet2 growing faster?

Between 2026-06 and 2026-07, Hellenic Academic and Research Institutions CA went from 0.17% to 0.13% of all tracked sites, while Internet2 went from 0.16% to 0.11%. Hellenic Academic and Research Institutions CA is gaining ground faster in our index.

Can a site use both Hellenic Academic and Research Institutions CA and Internet2?

No. A site runs a single SSL certificate authority, so Hellenic Academic and Research Institutions CA and Internet2 are mutually exclusive.

Hellenic Academic and Research Institutions CA vs Internet2 — Site Stats Database

Hellenic Academic and Research Institutions CA vs Internet2

Q: Where does this Hellenic Academic and Research Institutions CA vs Internet2 data come from?

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.

A side-by-side comparison of two ssl certificate authorities, based on the 842,065 SSL Authority sites tracked by Site Stats Database.

Last updated July 1, 2026

Metric	Hellenic Academic and Research Institutions CA	Internet2
Websites	1,161	978
Market share	0.14%	0.12%
Share of top 10K sites	0.00%

Share of top 100K sites	0.06%	0.53%

Rank	#11	#12

Median DR	75	76

Average DR	74	72

Median keywords	658	5,101

Median referring domains	5,129	2,226

Median domain age	26 yrs	34 yrs

Average domain age	24 yrs	31 yrs

Average monthly traffic	13,566	817,556

Combined monthly traffic	15,749,601	799,569,907

mpg.de
LanguageGerman
DR (Ahrefs)89
Total Keywords61,365
Referring Domains103,616
Domain Age
Traffic (Jun 2026)560,707
Traffic Trend
TechnologyHellenic Academic and Research Institutions CA
ucm.es
LanguageSpanish
DR (Ahrefs)84
Total Keywords21,955
Referring Domains58,616
Domain Age
Traffic (Jun 2026)520,587
Traffic Trend
TechnologyHellenic Academic and Research Institutions CA
eso.org
LanguageEnglish
DR (Ahrefs)82
Total Keywords18,717
Referring Domains32,647
Domain Age35 yrs
Traffic (Jun 2026)398,404
Traffic Trend
TechnologyHellenic Academic and Research Institutions CA
cun.es
LanguageSpanish
DR (Ahrefs)75
Total Keywords72,981
Referring Domains9,254
Domain Age
Traffic (Jun 2026)394,191
Traffic Trend
TechnologyHellenic Academic and Research Institutions CA
hal.science
LanguageEnglish
DR (Ahrefs)85
Total Keywords68,893
Referring Domains58,817
Domain Age
Traffic (Jun 2026)357,126
Traffic Trend
Technology
belgium.be
LanguageEnglish
DR (Ahrefs)90
Total Keywords12,117
Referring Domains64,675
Domain Age31 yrs
Traffic (Jun 2026)290,046
Traffic Trend
Technology
astro4edu.org
LanguageEnglish
DR (Ahrefs)48
Total Keywords15,128
Referring Domains1,030
Domain Age6 yrs
Traffic (Jun 2026)262,741
Traffic Trend
Technology
plantnet.org
LanguageEnglish
DR (Ahrefs)74
Total Keywords11,086
Referring Domains7,165
Domain Age12 yrs
Traffic (Jun 2026)234,714
Traffic Trend
Technology
bund.de
LanguageEnglish
DR (Ahrefs)94
Total Keywords99,279
Referring Domains462,466
Domain Age
Traffic (Jun 2026)224,202
Traffic Trend
TechnologyHellenic Academic and Research Institutions CA
habsburger.net
LanguageGerman
DR (Ahrefs)63
Total Keywords6,739
Referring Domains3,814
Domain Age17 yrs
Traffic (Jun 2026)188,745
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
mpg.de	German	89	61,365	103,616		560,707		Hellenic Academic and Research Institutions CA

si.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords1,137,159
Referring Domains237,359
Domain Age34 yrs
Traffic (Jun 2026)60,547,423
Traffic Trend
TechnologyInternet2
cornell.edu
LanguageEnglish
DR (Ahrefs)92
Total Keywords1,692,749
Referring Domains372,628
Domain Age40 yrs
Traffic (Jun 2026)54,727,724
Traffic Trend
Technology
stanford.edu
LanguageEnglish
DR (Ahrefs)92
Total Keywords1,198,840
Referring Domains511,286
Domain Age40 yrs
Traffic (Jun 2026)45,915,915
Traffic Trend
Technology
ufl.edu
LanguageEnglish
DR (Ahrefs)90
Total Keywords855,336
Referring Domains184,301
Domain Age40 yrs
Traffic (Jun 2026)18,671,974
Traffic Trend
TechnologyInternet2
umn.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords872,046
Referring Domains243,227
Domain Age39 yrs
Traffic (Jun 2026)17,043,429
Traffic Trend
TechnologyInternet2
utah.edu
LanguageEnglish
DR (Ahrefs)89
Total Keywords710,042
Referring Domains124,764
Domain Age39 yrs
Traffic (Jun 2026)14,911,220
Traffic Trend
TechnologyInternet2
mdanderson.org
LanguageEnglish
DR (Ahrefs)83
Total Keywords351,124
Referring Domains36,497
Domain Age29 yrs
Traffic (Jun 2026)14,049,960
Traffic Trend
Technology
oregonstate.edu
LanguageEnglish
DR (Ahrefs)89
Total Keywords551,866
Referring Domains107,559
Domain Age27 yrs
Traffic (Jun 2026)13,045,470
Traffic Trend
Technology
illinois.edu
LanguageEnglish
DR (Ahrefs)90
Total Keywords781,195
Referring Domains165,621
Domain Age29 yrs
Traffic (Jun 2026)12,771,348
Traffic Trend
Technology
rutgers.edu
LanguageEnglish
DR (Ahrefs)90
Total Keywords402,403
Referring Domains132,809
Domain Age41 yrs
Traffic (Jun 2026)9,973,805
Traffic Trend
Technology