Is Certainly or Cloudflare more popular?

Cloudflare is used by more websites in our catalog: 776 use Certainly and 888 use Cloudflare.

Does Certainly or Cloudflare have higher-authority sites?

Certainly sites have the higher median Ahrefs Domain Rating (Certainly: 63, Cloudflare: 27).

Is Certainly or Cloudflare growing faster?

Between 2026-06 and 2026-07, Certainly went from 0.12% to 0.09% of all tracked sites, while Cloudflare went from 0.12% to 0.10%. Cloudflare is gaining ground faster in our index.

Can a site use both Certainly and Cloudflare?

No. A site runs a single SSL certificate authority, so Certainly and Cloudflare are mutually exclusive.

Where does this Certainly vs Cloudflare 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 Cloudflare — Site Stats Database

Certainly vs Cloudflare

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	Cloudflare
Websites	776	888
Market share	0.09%	0.11%
Share of top 10K sites	0.67%	0.19%

Rank	#14	#13

Median DR	63	27

Average DR	58	31

Median keywords	1,634	832

Median referring domains	1,209	351

Median domain age	23 yrs	14 yrs

Average domain age	20 yrs	15 yrs

Average monthly traffic	695,346	121,412

Combined monthly traffic	539,588,145	107,814,215

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
TechnologyCertainly
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
TechnologyCertainly

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

worldatlas.com
LanguageEnglish
DR (Ahrefs)83
Total Keywords1,154,249
Referring Domains83,353
Domain Age30 yrs
Traffic (Jun 2026)25,631,671
Traffic Trend
TechnologyCloudflare
carrier.com
LanguageEnglish
DR (Ahrefs)84
Total Keywords109,462
Referring Domains20,061
Domain Age30 yrs
Traffic (Jun 2026)6,502,261
Traffic Trend
TechnologyCloudflare
visa.com
LanguageEnglish
DR (Ahrefs)91
Total Keywords104,842
Referring Domains67,229
Domain Age32 yrs
Traffic (Jun 2026)6,433,458
Traffic Trend
TechnologyCloudflare
nmaahc.si.edu
Language
DR (Ahrefs)91
Total Keywords63,346
Referring Domains27,403
Domain Age34 yrs
Traffic (Jun 2026)5,188,883
Traffic Trend
Technology
biologyonline.com
LanguageEnglish
DR (Ahrefs)72
Total Keywords206,401
Referring Domains11,428
Domain Age27 yrs
Traffic (Jun 2026)4,864,746
Traffic Trend
Technology
ocean.si.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords76,961
Referring Domains11,637
Domain Age34 yrs
Traffic (Jun 2026)4,206,621
Traffic Trend
Technology
99restaurants.com
LanguageEnglish
DR (Ahrefs)55
Total Keywords29,878
Referring Domains2,297
Domain Age28 yrs
Traffic (Jun 2026)4,081,333
Traffic Trend
Technology
bestwordlist.com
LanguageEnglish
DR (Ahrefs)42
Total Keywords124,340
Referring Domains2,383
Domain Age13 yrs
Traffic (Jun 2026)3,733,167
Traffic Trend
Technology
americanhistory.si.edu
LanguageEnglish
DR (Ahrefs)91
Total Keywords150,962
Referring Domains35,692
Domain Age34 yrs
Traffic (Jun 2026)2,955,660
Traffic Trend
Technology
bryant.com
LanguageEnglish
DR (Ahrefs)75
Total Keywords52,483
Referring Domains2,766
Domain Age29 yrs
Traffic (Jun 2026)1,995,503
Traffic Trend
TechnologyCloudflare