Is DigiCert or ZeroSSL more popular?

DigiCert is used by more websites in our catalog: 35,062 use DigiCert and 2,425 use ZeroSSL.

Does DigiCert or ZeroSSL have higher-authority sites?

DigiCert sites have the higher median Ahrefs Domain Rating (DigiCert: 53, ZeroSSL: 23).

Is DigiCert or ZeroSSL growing faster?

Between 2026-06 and 2026-07, DigiCert went from 5.3% to 4.0% of all tracked sites, while ZeroSSL went from 0.29% to 0.28%. ZeroSSL is gaining ground faster in our index.

Can a site use both DigiCert and ZeroSSL?

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

Where does this DigiCert vs ZeroSSL 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.

DigiCert vs ZeroSSL — Site Stats Database

DigiCert vs ZeroSSL

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	DigiCert	ZeroSSL
Websites	35,062	2,425
Market share	4.2%	0.29%
Share of top 10K sites	13%	0.16%

Rank	#3	#9

Median DR	53	23

Average DR	50	28

Median keywords	1,162	1,066

Median referring domains	869	433

Median domain age	22 yrs	11 yrs

Average domain age	21 yrs	13 yrs

Average monthly traffic	899,101	66,319

Combined monthly traffic	31,524,291,463	160,824,401

reddit.com
Language
DR (Ahrefs)95
Total Keywords108,484,703
Referring Domains1,816,031
Domain Age21 yrs
Traffic (Jun 2026)4,801,167,771
Traffic Trend
TechnologyDigiCert
facebook.com
LanguageEnglish
DR (Ahrefs)100
Total Keywords130,296,472
Referring Domains37,387,092
Domain Age29 yrs
Traffic (Jun 2026)3,317,277,661
Traffic Trend
Technology
instagram.com
LanguageEnglish
DR (Ahrefs)100
Total Keywords103,652,284
Referring Domains25,257,813
Domain Age22 yrs
Traffic (Jun 2026)2,566,799,220
Traffic Trend
Technology
amazon.com
LanguageEnglish
DR (Ahrefs)96
Total Keywords45,669,286
Referring Domains3,247,160
Domain Age31 yrs
Traffic (Jun 2026)2,401,671,408
Traffic Trend
Technology
yelp.com
Language
DR (Ahrefs)94
Total Keywords34,240,481
Referring Domains773,122
Domain Age22 yrs
Traffic (Jun 2026)1,590,167,976
Traffic Trend
TechnologyDigiCert
pinterest.com
LanguageEnglish
DR (Ahrefs)97
Total Keywords36,716,308
Referring Domains7,554,973
Domain Age16 yrs
Traffic (Jun 2026)893,101,946
Traffic Trend
Technology
yahoo.com
LanguageEnglish
DR (Ahrefs)94
Total Keywords23,561,825
Referring Domains2,118,636
Domain Age31 yrs
Traffic (Jun 2026)639,658,909
Traffic Trend
Technology
rottentomatoes.com
LanguageEnglish
DR (Ahrefs)87
Total Keywords4,123,803
Referring Domains130,919
Domain Age27 yrs
Traffic (Jun 2026)626,896,769
Traffic Trend
Technology
weather.com
LanguageEnglish
DR (Ahrefs)90
Total Keywords1,156,559
Referring Domains130,903
Domain Age31 yrs
Traffic (Jun 2026)560,457,254
Traffic Trend
Technology
spotify.com
LanguageEnglish
DR (Ahrefs)95
Total Keywords7,485,298
Referring Domains1,649,815
Domain Age20 yrs
Traffic (Jun 2026)505,668,332
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
reddit.com		95	108,484,703	1,816,031	21 yrs	4,801,167,771		DigiCert

dailymotion.com
LanguageEnglish
DR (Ahrefs)91
Total Keywords5,631,851
Referring Domains439,650
Domain Age21 yrs
Traffic (Jun 2026)29,762,292
Traffic Trend
TechnologyZeroSSL
petfinder.com
Language
DR (Ahrefs)86
Total Keywords309,140
Referring Domains35,407
Domain Age28 yrs
Traffic (Jun 2026)17,935,968
Traffic Trend
Technology
purina.com
Language
DR (Ahrefs)80
Total Keywords279,239
Referring Domains20,198
Domain Age30 yrs
Traffic (Jun 2026)15,738,940
Traffic Trend
TechnologyZeroSSL
easemate.ai
LanguageEnglish
DR (Ahrefs)50
Total Keywords31,731
Referring Domains2,281
Domain Age1 yr
Traffic (Jun 2026)12,535,413
Traffic Trend
Technology
chinahighlights.com
LanguageEnglish
DR (Ahrefs)78
Total Keywords76,271
Referring Domains25,545
Domain Age27 yrs
Traffic (Jun 2026)7,779,761
Traffic Trend
Technology
jellycat.com
LanguageEnglish
DR (Ahrefs)71
Total Keywords82,329
Referring Domains4,508
Domain Age26 yrs
Traffic (Jun 2026)4,163,338
Traffic Trend
Technology
sf.gov
LanguageEnglish
DR (Ahrefs)83
Total Keywords125,412
Referring Domains18,090
Domain Age10 yrs
Traffic (Jun 2026)3,627,926
Traffic Trend
TechnologyZeroSSL
screener.in
LanguageEnglish
DR (Ahrefs)72
Total Keywords59,916
Referring Domains4,356
Domain Age16 yrs
Traffic (Jun 2026)2,799,998
Traffic Trend
Technology
finedictionary.com
LanguageEnglish
DR (Ahrefs)40
Total Keywords282,639
Referring Domains2,583
Domain Age13 yrs
Traffic (Jun 2026)2,352,439
Traffic Trend
Technology
kwickmenu.com
LanguageEnglish
DR (Ahrefs)76
Total Keywords120,864
Referring Domains2,786
Domain Age9 yrs
Traffic (Jun 2026)1,927,802
Traffic Trend
Technology