Is InCommon, LLC or PerfectSSL more popular?

PerfectSSL is used by more websites in our catalog: 110 use InCommon, LLC and 141 use PerfectSSL.

Does InCommon, LLC or PerfectSSL have higher-authority sites?

InCommon, LLC sites have the higher median Ahrefs Domain Rating (InCommon, LLC: 73, PerfectSSL: 32).

Is InCommon, LLC or PerfectSSL growing faster?

Between 2026-06 and 2026-07, InCommon, LLC went from 0.02% to 0.01% of all tracked sites, while PerfectSSL went from 0.02% to 0.02%. PerfectSSL is gaining ground faster in our index.

Can a site use both InCommon, LLC and PerfectSSL?

No. A site runs a single SSL certificate authority, so InCommon, LLC and PerfectSSL are mutually exclusive.

Where does this InCommon, LLC vs PerfectSSL 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.

InCommon, LLC vs PerfectSSL — Site Stats Database

InCommon, LLC vs PerfectSSL

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	InCommon, LLC	PerfectSSL
Websites	110	141
Market share	0.01%	0.02%
Share of top 10K sites	0.17%	0.01%

Rank	#34	#30

Median DR	73	32

Average DR	68	34

Median keywords	3,920	482

Median referring domains	2,014	554

Median domain age	33 yrs	16 yrs

Average domain age	30 yrs	17 yrs

Average monthly traffic	1,275,880	26,083

Combined monthly traffic	140,346,847	3,677,718

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

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
purdue.edu	English	90	877,227	170,898	41 yrs	37,101,645		InCommon, LLC

giant-bicycles.com
LanguageEnglish
DR (Ahrefs)79
Total Keywords31,182
Referring Domains14,460
Domain Age27 yrs
Traffic (Jun 2026)1,662,799
Traffic Trend
TechnologyPerfectSSL
majstro.com
LanguageEnglish
DR (Ahrefs)37
Total Keywords131,520
Referring Domains2,709
Domain Age23 yrs
Traffic (Jun 2026)333,984
Traffic Trend
Technology
airports-guides.com
LanguageEnglish
DR (Ahrefs)42
Total Keywords44,543
Referring Domains1,482
Domain Age22 yrs
Traffic (Jun 2026)327,422
Traffic Trend
Technology
liv-cycling.com
LanguageEnglish
DR (Ahrefs)75
Total Keywords16,579
Referring Domains3,801
Domain Age13 yrs
Traffic (Jun 2026)288,744
Traffic Trend
Technology
momentum-biking.com
LanguageEnglish
DR (Ahrefs)56
Total Keywords3,599
Referring Domains912
Domain Age17 yrs
Traffic (Jun 2026)128,904
Traffic Trend
Technology
vintagerockmag.com
LanguageEnglish
DR (Ahrefs)32
Total Keywords2,847
Referring Domains748
Domain Age14 yrs
Traffic (Jun 2026)85,769
Traffic Trend
Technology
gotheborg.com
Language
DR (Ahrefs)51
Total Keywords4,721
Referring Domains1,370
Domain Age27 yrs
Traffic (Jun 2026)67,336
Traffic Trend
Technology
bridgewebs.com
LanguageEnglish
DR (Ahrefs)73
Total Keywords4,159
Referring Domains2,928
Domain Age19 yrs
Traffic (Jun 2026)66,059
Traffic Trend
Technology
silenthillmemories.net
LanguageEnglish
DR (Ahrefs)36
Total Keywords5,544
Referring Domains2,159
Domain Age19 yrs
Traffic (Jun 2026)62,845
Traffic Trend
Technology
finediningexplorer.com
LanguageEnglish
DR (Ahrefs)20
Total Keywords1,798
Referring Domains714
Domain Age18 yrs
Traffic (Jun 2026)59,464
Traffic Trend
Technology