Is co.jp or IONOS more popular?

IONOS is used by more websites in our catalog: 205 use co.jp and 7,789 use IONOS.

Does co.jp or IONOS have higher-authority sites?

co.jp sites have the higher median Ahrefs Domain Rating (co.jp: 60, IONOS: 20).

Is co.jp or IONOS growing faster?

Between 2026-06 and 2026-07, co.jp went from 0.03% to 0.02% of all tracked sites, while IONOS went from 0.97% to 0.88%. co.jp is gaining ground faster in our index.

Can a site use both co.jp and IONOS?

No. A site runs a single email host, so co.jp and IONOS are mutually exclusive.

Where does this co.jp vs IONOS 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.

co.jp vs IONOS — Site Stats Database

co.jp vs IONOS

A side-by-side comparison of two email hosting providers, based on the 736,999 Email Host sites tracked by Site Stats Database.

Last updated July 1, 2026

Metric	co.jp	IONOS
Websites	205	7,789
Market share	0.03%	1.1%
Share of top 10K sites	0.01%	0.28%
Share of top 100K sites

Rank	#97	#12

Median DR	60	20

Average DR	59	23

Median keywords	145	740

Median referring domains	2,315	262

Median domain age	26 yrs	14 yrs

Average domain age	23 yrs	15 yrs

Average monthly traffic	19,427	24,476

Combined monthly traffic	3,982,522	190,641,754

yahoo.co.jp
LanguageJapanese
DR (Ahrefs)93
Total Keywords128,587
Referring Domains376,405
Domain Age6 yrs
Traffic (Jun 2026)1,352,299
Traffic Trend
Technologyco.jp
kinokuniya.com
Language
DR (Ahrefs)74
Total Keywords27,138
Referring Domains14,841
Domain Age31 yrs
Traffic (Jun 2026)676,555
Traffic Trend
Technology
nissan-global.com
LanguageEnglish
DR (Ahrefs)79
Total Keywords15,856
Referring Domains16,759
Domain Age25 yrs
Traffic (Jun 2026)500,792
Traffic Trend
Technology
gran-turismo.com
LanguageEnglish
DR (Ahrefs)73
Total Keywords7,411
Referring Domains15,247
Domain Age26 yrs
Traffic (Jun 2026)233,593
Traffic Trend
Technology
luft.co.jp
LanguageJapanese
DR (Ahrefs)64
Total Keywords14,422
Referring Domains2,475
Domain Age2 yrs
Traffic (Jun 2026)133,990
Traffic Trend
Technology
mlcjapanese.co.jp
LanguageJapanese
DR (Ahrefs)35
Total Keywords4,140
Referring Domains1,126
Domain Age26 yrs
Traffic (Jun 2026)96,861
Traffic Trend
Technology
daiso-sangyo.co.jp
Language
DR (Ahrefs)74
Total Keywords638
Referring Domains6,483
Domain Age26 yrs
Traffic (Jun 2026)93,764
Traffic Trend
Technology
tokyotower.co.jp
Language
DR (Ahrefs)74
Total Keywords1,037
Referring Domains7,686
Domain Age28 yrs
Traffic (Jun 2026)73,535
Traffic Trend
Technology
libertywalk.co.jp
LanguageJapanese
DR (Ahrefs)56
Total Keywords7,875
Referring Domains3,025
Domain Age23 yrs
Traffic (Jun 2026)65,571
Traffic Trend
Technology
yomiuri.co.jp
LanguageJapanese
DR (Ahrefs)89
Total Keywords17,210
Referring Domains110,270
Domain Age31 yrs
Traffic (Jun 2026)52,047
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
yahoo.co.jp	Japanese	93	128,587	376,405	6 yrs	1,352,299		co.jp

hymnary.org
LanguageEnglish
DR (Ahrefs)76
Total Keywords117,263
Referring Domains11,140
Domain Age18 yrs
Traffic (Jun 2026)4,772,622
Traffic Trend
TechnologyIONOS
globalgrasshopper.com
LanguageEnglish
DR (Ahrefs)56
Total Keywords34,335
Referring Domains5,752
Domain Age16 yrs
Traffic (Jun 2026)3,446,026
Traffic Trend
Technology
shabdkosh.com
LanguageEnglish
DR (Ahrefs)71
Total Keywords506,879
Referring Domains7,464
Domain Age22 yrs
Traffic (Jun 2026)3,091,148
Traffic Trend
Technology
playoffstatus.com
LanguageEnglish
DR (Ahrefs)45
Total Keywords38,733
Referring Domains2,460
Domain Age20 yrs
Traffic (Jun 2026)2,596,888
Traffic Trend
Technology
dickies.com
Language
DR (Ahrefs)71
Total Keywords80,796
Referring Domains6,617
Domain Age30 yrs
Traffic (Jun 2026)2,530,864
Traffic Trend
Technology
bachelorprint.com
LanguageEnglish
DR (Ahrefs)46
Total Keywords65,856
Referring Domains2,364
Domain Age11 yrs
Traffic (Jun 2026)2,498,336
Traffic Trend
Technology
workybooks.com
LanguageEnglish
DR (Ahrefs)19
Total Keywords114,432
Referring Domains211
Domain Age9 yrs
Traffic (Jun 2026)2,298,750
Traffic Trend
Technology
costumesupercenter.com
Language
DR (Ahrefs)52
Total Keywords52,686
Referring Domains2,654
Domain Age20 yrs
Traffic (Jun 2026)1,975,810
Traffic Trend
Technology
njweather.org
LanguageEnglish
DR (Ahrefs)39
Total Keywords8,820
Referring Domains929
Domain Age12 yrs
Traffic (Jun 2026)1,884,496
Traffic Trend
Technology
pigeonforge.com
Language
DR (Ahrefs)54
Total Keywords51,381
Referring Domains5,067
Domain Age30 yrs
Traffic (Jun 2026)1,859,433
Traffic Trend
Technology