Is InCommon, LLC or Let's Encrypt more popular?

Let's Encrypt is used by more websites in our catalog: 110 use InCommon, LLC and 466,882 use Let's Encrypt.

Does InCommon, LLC or Let's Encrypt have higher-authority sites?

InCommon, LLC sites have the higher median Ahrefs Domain Rating (InCommon, LLC: 73, Let's Encrypt: 23).

Is InCommon, LLC or Let's Encrypt growing faster?

Between 2026-06 and 2026-07, InCommon, LLC went from 0.02% to 0.01% of all tracked sites, while Let's Encrypt went from 59% to 53%. InCommon, LLC is gaining ground faster in our index.

Can a site use both InCommon, LLC and Let's Encrypt?

No. A site runs a single SSL certificate authority, so InCommon, LLC and Let's Encrypt are mutually exclusive.

Where does this InCommon, LLC vs Let's Encrypt 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 Let's Encrypt — Site Stats Database

InCommon, LLC vs Let's Encrypt

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	Let's Encrypt
Websites	110	466,882
Market share	0.01%	55%
Share of top 10K sites	0.17%	30%

Rank	#34	#1

Median DR	73	23

Average DR	68	27

Median keywords	3,920	849

Median referring domains	2,014	270

Median domain age	33 yrs	12 yrs

Average domain age	30 yrs	14 yrs

Average monthly traffic	1,275,880	108,181

Combined monthly traffic	140,346,847	50,507,691,242

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

wikipedia.org
LanguageEnglish
DR (Ahrefs)97
Total Keywords61,690,521
Referring Domains6,594,435
Domain Age25 yrs
Traffic (Jun 2026)11,208,499,330
Traffic Trend
TechnologyLet's Encrypt
x.com
LanguageEnglish
DR (Ahrefs)97
Total Keywords15,888,487
Referring Domains4,249,759
Domain Age33 yrs
Traffic (Jun 2026)354,173,918
Traffic Trend
TechnologyLet's Encrypt
nfl.com
LanguageEnglish
DR (Ahrefs)89
Total Keywords947,630
Referring Domains147,040
Domain Age30 yrs
Traffic (Jun 2026)275,712,888
Traffic Trend
TechnologyLet's Encrypt
nba.com
LanguageEnglish
DR (Ahrefs)90
Total Keywords758,560
Referring Domains186,338
Domain Age31 yrs
Traffic (Jun 2026)239,244,892
Traffic Trend
TechnologyLet's Encrypt
stock.adobe.com
Language
DR (Ahrefs)96
Total Keywords3,301,936
Referring Domains116,531
Domain Age39 yrs
Traffic (Jun 2026)225,699,793
Traffic Trend
Technology
weather.gov
LanguageEnglish
DR (Ahrefs)91
Total Keywords1,098,961
Referring Domains132,221
Domain Age27 yrs
Traffic (Jun 2026)221,232,646
Traffic Trend
Technology
expedia.com
Language
DR (Ahrefs)90
Total Keywords4,797,516
Referring Domains112,144
Domain Age30 yrs
Traffic (Jun 2026)208,730,561
Traffic Trend
Technology
target.com
LanguageEnglish
DR (Ahrefs)91
Total Keywords10,174,393
Referring Domains208,795
Domain Age29 yrs
Traffic (Jun 2026)204,573,119
Traffic Trend
Technology
vocabulary.com
LanguageEnglish
DR (Ahrefs)81
Total Keywords2,454,757
Referring Domains42,680
Domain Age29 yrs
Traffic (Jun 2026)192,093,469
Traffic Trend
Technology
allrecipes.com
Language
DR (Ahrefs)89
Total Keywords3,491,845
Referring Domains151,904
Domain Age27 yrs
Traffic (Jun 2026)166,334,891
Traffic Trend
Technology