Is opalstack.com or registrar-servers.com more popular?

registrar-servers.com is used by more websites in our catalog: 112 use opalstack.com and 4,623 use registrar-servers.com.

Does opalstack.com or registrar-servers.com have higher-authority sites?

opalstack.com sites have the higher median Ahrefs Domain Rating (opalstack.com: 27, registrar-servers.com: 8).

Is opalstack.com or registrar-servers.com growing faster?

Between 2026-06 and 2026-07, opalstack.com went from 0.02% to 0.01% of all tracked sites, while registrar-servers.com went from 0.58% to 0.52%. opalstack.com is gaining ground faster in our index.

Can a site use both opalstack.com and registrar-servers.com?

No. A site runs a single email host, so opalstack.com and registrar-servers.com are mutually exclusive.

Where does this opalstack.com vs registrar-servers.com 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.

opalstack.com vs registrar-servers.com — Site Stats Database

opalstack.com vs registrar-servers.com

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	opalstack.com	registrar-servers.com
Websites	112	4,623
Market share	0.02%	0.63%
Share of top 10K sites	0.02%	0.11%

Share of top 100K sites	0.01%	0.20%

Rank	#147	#15

Median DR	27	8

Average DR	30	15

Median keywords	814	595

Median referring domains	422	94

Median domain age	15 yrs	4 yrs

Average domain age	15 yrs	5 yrs

Average monthly traffic	58,641	16,601

Combined monthly traffic	6,567,751	76,748,227

wordsies.com
LanguageEnglish
DR (Ahrefs)33
Total Keywords27,396
Referring Domains415
Domain Age12 yrs
Traffic (Jun 2026)2,247,281
Traffic Trend
Technologyopalstack.com
morsecode.world
LanguageEnglish
DR (Ahrefs)63
Total Keywords4,901
Referring Domains3,341
Domain Age8 yrs
Traffic (Jun 2026)1,009,605
Traffic Trend
Technology
fachords.com
LanguageEnglish
DR (Ahrefs)35
Total Keywords13,914
Referring Domains1,155
Domain Age13 yrs
Traffic (Jun 2026)763,266
Traffic Trend
Technologyopalstack.com
omniatlas.com
LanguageEnglish
DR (Ahrefs)31
Total Keywords12,827
Referring Domains1,566
Domain Age14 yrs
Traffic (Jun 2026)443,631
Traffic Trend
Technology
hanginghyena.com
LanguageEnglish
DR (Ahrefs)35
Total Keywords29,535
Referring Domains1,810
Domain Age14 yrs
Traffic (Jun 2026)356,859
Traffic Trend
Technology
differencebetween.net
LanguageEnglish
DR (Ahrefs)72
Total Keywords112,461
Referring Domains18,613
Domain Age17 yrs
Traffic (Jun 2026)238,288
Traffic Trend
Technology
tophonetics.com
LanguageEnglish
DR (Ahrefs)57
Total Keywords2,813
Referring Domains1,439
Domain Age9 yrs
Traffic (Jun 2026)185,171
Traffic Trend
Technology
jumblesolver.us
LanguageEnglish
DR (Ahrefs)18
Total Keywords10,364
Referring Domains658
Domain Age9 yrs
Traffic (Jun 2026)158,172
Traffic Trend
Technology
how-to-type.com
LanguageEnglish
DR (Ahrefs)41
Total Keywords4,943
Referring Domains951
Domain Age14 yrs
Traffic (Jun 2026)137,122
Traffic Trend
Technology
lauraerickson.com
LanguageEnglish
DR (Ahrefs)40
Total Keywords11,285
Referring Domains1,061
Domain Age24 yrs
Traffic (Jun 2026)133,999
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
wordsies.com	English	33	27,396	415	12 yrs	2,247,281		opalstack.com

currenttimeutc.com
LanguageEnglish
DR (Ahrefs)6
Total Keywords44,476
Referring Domains375
Domain Age3 yrs
Traffic (Jun 2026)2,820,351
Traffic Trend
Technologyregistrar-servers.com
icdcodes.ai
Language
DR (Ahrefs)15
Total Keywords155,300
Referring Domains703
Domain Age1 yr
Traffic (Jun 2026)2,640,346
Traffic Trend
Technologyregistrar-servers.com
goto-restaurants.com
LanguageEnglish
DR (Ahrefs)53
Total Keywords516,971
Referring Domains1,055
Domain Age1 yr
Traffic (Jun 2026)2,211,020
Traffic Trend
Technology
slithergame.io
LanguageEnglish
DR (Ahrefs)53
Total Keywords3,616
Referring Domains1,885
Domain Age
Traffic (Jun 2026)1,714,766
Traffic Trend
Technology
bg3.wiki
LanguageEnglish
DR (Ahrefs)51
Total Keywords72,593
Referring Domains3,295
Domain Age4 yrs
Traffic (Jun 2026)1,417,526
Traffic Trend
Technologyregistrar-servers.com
tankathon.com
LanguageEnglish
DR (Ahrefs)60
Total Keywords45,089
Referring Domains4,451
Domain Age12 yrs
Traffic (Jun 2026)1,393,122
Traffic Trend
Technology
ratemycourses.io
LanguageEnglish
DR (Ahrefs)22
Total Keywords3,590
Referring Domains319
Domain Age5 yrs
Traffic (Jun 2026)1,170,997
Traffic Trend
Technology
wordswithfriendscheat.io
LanguageEnglish
DR (Ahrefs)27
Total Keywords2,890
Referring Domains671
Domain Age8 yrs
Traffic (Jun 2026)1,116,251
Traffic Trend
Technology
googlesnakemods.com
LanguageEnglish
DR (Ahrefs)35
Total Keywords749
Referring Domains531
Domain Age2 yrs
Traffic (Jun 2026)1,106,621
Traffic Trend
Technology
mapcomplete.org
LanguageEnglish
DR (Ahrefs)60
Total Keywords2,287
Referring Domains394
Domain Age2 yrs
Traffic (Jun 2026)1,085,753
Traffic Trend
Technology