Is Certainly or Japan Registry Services Co., Ltd. more popular?

Certainly is used by more websites in our catalog: 776 use Certainly and 194 use Japan Registry Services Co., Ltd..

Does Certainly or Japan Registry Services Co., Ltd. have higher-authority sites?

Certainly sites have the higher median Ahrefs Domain Rating (Certainly: 63, Japan Registry Services Co., Ltd.: 59).

Is Certainly or Japan Registry Services Co., Ltd. growing faster?

Between 2026-06 and 2026-07, Certainly went from 0.12% to 0.09% of all tracked sites, while Japan Registry Services Co., Ltd. went from 0.03% to 0.02%. Japan Registry Services Co., Ltd. is gaining ground faster in our index.

Can a site use both Certainly and Japan Registry Services Co., Ltd.?

No. A site runs a single SSL certificate authority, so Certainly and Japan Registry Services Co., Ltd. are mutually exclusive.

Where does this Certainly vs Japan Registry Services Co., Ltd. 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.

Certainly vs Japan Registry Services Co., Ltd. — Site Stats Database

Certainly vs Japan Registry Services Co., Ltd.

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	Certainly	Japan Registry Services Co., Ltd.
Websites	776	194
Market share	0.09%	0.02%
Share of top 10K sites	0.67%	0.00%

Share of top 100K sites	0.21%	0.01%

Rank	#14	#25

Median DR	63	59

Average DR	58	55

Median keywords	1,634	140

Median referring domains	1,209	1,580

Median domain age	23 yrs	24 yrs

Average domain age	20 yrs	20 yrs

Average monthly traffic	695,346	9,237

Combined monthly traffic	539,588,145	1,791,947

akc.org
LanguageEnglish
DR (Ahrefs)90
Total Keywords655,094
Referring Domains78,973
Domain Age31 yrs
Traffic (Jun 2026)125,727,029
Traffic Trend
TechnologyCertainly
wikihow.com
LanguageEnglish
DR (Ahrefs)91
Total Keywords5,580,639
Referring Domains404,808
Domain Age22 yrs
Traffic (Jun 2026)43,976,309
Traffic Trend
Technology
ubiehealth.com
LanguageEnglish
DR (Ahrefs)62
Total Keywords519,101
Referring Domains2,750
Domain Age4 yrs
Traffic (Jun 2026)31,668,228
Traffic Trend
Technology
ufc.com
LanguageEnglish
DR (Ahrefs)81
Total Keywords103,879
Referring Domains28,384
Domain Age31 yrs
Traffic (Jun 2026)18,875,616
Traffic Trend
TechnologyCertainly
bible.com
LanguageEnglish
DR (Ahrefs)90
Total Keywords681,273
Referring Domains50,220
Domain Age31 yrs
Traffic (Jun 2026)17,974,483
Traffic Trend
TechnologyCertainly
bathandbodyworks.com
LanguageEnglish
DR (Ahrefs)77
Total Keywords89,451
Referring Domains23,742
Domain Age28 yrs
Traffic (Jun 2026)16,958,001
Traffic Trend
Technology
time.com
LanguageEnglish
DR (Ahrefs)92
Total Keywords1,667,220
Referring Domains590,607
Domain Age32 yrs
Traffic (Jun 2026)15,941,582
Traffic Trend
TechnologyCertainly
aad.org
LanguageEnglish
DR (Ahrefs)90
Total Keywords359,999
Referring Domains56,366
Domain Age30 yrs
Traffic (Jun 2026)15,847,168
Traffic Trend
TechnologyCertainly
yale.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords637,409
Referring Domains270,573
Domain Age39 yrs
Traffic (Jun 2026)14,257,045
Traffic Trend
TechnologyCertainly
arizona.edu
LanguageEnglish
DR (Ahrefs)90
Total Keywords497,891
Referring Domains140,110
Domain Age40 yrs
Traffic (Jun 2026)9,982,834
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
akc.org	English	90	655,094	78,973	31 yrs	125,727,029		Certainly

kyoto.travel
LanguageEnglish
DR (Ahrefs)77
Total Keywords6,962
Referring Domains8,975
Domain Age19 yrs
Traffic (Jun 2026)324,051
Traffic Trend
TechnologyJapan Registry Services Co., Ltd.
royal-hawaiian.com
LanguageJapanese
DR (Ahrefs)61
Total Keywords4,602
Referring Domains2,251
Domain Age30 yrs
Traffic (Jun 2026)268,195
Traffic Trend
Technology
hakone-japan.com
LanguageEnglish
DR (Ahrefs)46
Total Keywords3,089
Referring Domains832
Domain Age8 yrs
Traffic (Jun 2026)151,986
Traffic Trend
Technology
meijijingu.or.jp
LanguageJapanese
DR (Ahrefs)72
Total Keywords657
Referring Domains6,156
Domain Age29 yrs
Traffic (Jun 2026)85,253
Traffic Trend
Technology
webike.net
LanguageEnglish
DR (Ahrefs)74
Total Keywords23,413
Referring Domains10,224
Domain Age25 yrs
Traffic (Jun 2026)71,603
Traffic Trend
Technology
matsusada.com
Language
DR (Ahrefs)34
Total Keywords5,170
Referring Domains790
Domain Age29 yrs
Traffic (Jun 2026)70,964
Traffic Trend
Technology
nihongo-e-na.com
Language
DR (Ahrefs)51
Total Keywords2,923
Referring Domains857
Domain Age16 yrs
Traffic (Jun 2026)58,172
Traffic Trend
Technology
nagoya-info.jp
LanguageKorean
DR (Ahrefs)71
Total Keywords1,527
Referring Domains4,443
Domain Age14 yrs
Traffic (Jun 2026)54,680
Traffic Trend
Technology
utaten.com
LanguageJapanese
DR (Ahrefs)64
Total Keywords25,817
Referring Domains5,771
Domain Age21 yrs
Traffic (Jun 2026)50,802
Traffic Trend
Technology
ainu-upopoy.jp
LanguageJapanese
DR (Ahrefs)69
Total Keywords216
Referring Domains1,966
Domain Age7 yrs
Traffic (Jun 2026)37,593
Traffic Trend
Technology