Is Hellenic Academic and Research Institutions CA or InCommon, LLC 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 110 use InCommon, LLC.

Does Hellenic Academic and Research Institutions CA or InCommon, LLC have higher-authority sites?

Hellenic Academic and Research Institutions CA sites have the higher median Ahrefs Domain Rating (Hellenic Academic and Research Institutions CA: 75, InCommon, LLC: 73).

Is Hellenic Academic and Research Institutions CA or InCommon, LLC 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 InCommon, LLC went from 0.02% to 0.01%. InCommon, LLC is gaining ground faster in our index.

Hellenic Academic and Research Institutions CA vs InCommon, LLC — Site Stats Database

Hellenic Academic and Research Institutions CA vs InCommon, LLC

Q: Can a site use both Hellenic Academic and Research Institutions CA and InCommon, LLC?

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

Q: Where does this Hellenic Academic and Research Institutions CA vs InCommon, LLC 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	InCommon, LLC
Websites	1,161	110
Market share	0.14%	0.01%
Share of top 10K sites	0.00%

Share of top 100K sites	0.06%	0.05%

Rank	#11	#34

Median DR	75	73

Average DR	74	68

Median keywords	658	3,920

Median referring domains	5,129	2,014

Median domain age	26 yrs	33 yrs

Average domain age	24 yrs	30 yrs

Average monthly traffic	13,566	1,275,880

Combined monthly traffic	15,749,601	140,346,847

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

purdue.edu
LanguageEnglish
DR (Ahrefs)90
Total Keywords877,227
Referring Domains170,898
Domain Age41 yrs
Traffic (Jun 2026)37,101,645
Traffic Trend
TechnologyInCommon, LLC
ncsu.edu
LanguageEnglish
DR (Ahrefs)90
Total Keywords774,707
Referring Domains123,047
Domain Age39 yrs
Traffic (Jun 2026)20,038,787
Traffic Trend
TechnologyInCommon, LLC
rochester.edu
LanguageEnglish
DR (Ahrefs)88
Total Keywords668,671
Referring Domains98,577
Domain Age39 yrs
Traffic (Jun 2026)11,687,937
Traffic Trend
Technology
uchicago.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords465,840
Referring Domains223,232
Domain Age34 yrs
Traffic (Jun 2026)7,172,842
Traffic Trend
Technology
hort.extension.wisc.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords109,362
Referring Domains6,956
Domain Age40 yrs
Traffic (Jun 2026)5,349,514
Traffic Trend
Technology
ufhealth.org
LanguageEnglish
DR (Ahrefs)77
Total Keywords405,348
Referring Domains13,570
Domain Age13 yrs
Traffic (Jun 2026)5,056,394
Traffic Trend
Technology
iu.edu
LanguageEnglish
DR (Ahrefs)89
Total Keywords240,126
Referring Domains79,917
Domain Age29 yrs
Traffic (Jun 2026)4,352,782
Traffic Trend
TechnologyInCommon, LLC
berklee.edu
LanguageEnglish
DR (Ahrefs)81
Total Keywords73,204
Referring Domains21,365
Domain Age33 yrs
Traffic (Jun 2026)2,380,230
Traffic Trend
Technology
umass.edu
LanguageEnglish
DR (Ahrefs)88
Total Keywords172,338
Referring Domains90,948
Domain Age40 yrs
Traffic (Jun 2026)2,169,778
Traffic Trend
TechnologyInCommon, LLC
bcm.edu
LanguageEnglish
DR (Ahrefs)81
Total Keywords129,477
Referring Domains26,270
Domain Age31 yrs
Traffic (Jun 2026)1,874,650
Traffic Trend
TechnologyInCommon, LLC