Is Bootstrap or W3.CSS more popular?

Bootstrap is used by more websites in our catalog: 126,851 use Bootstrap and 1,051 use W3.CSS.

Does Bootstrap or W3.CSS have higher-authority sites?

Bootstrap sites have the higher median Ahrefs Domain Rating (Bootstrap: 29, W3.CSS: 23).

Is Bootstrap or W3.CSS growing faster?

Between 2026-06 and 2026-07, Bootstrap went from 16% to 14% of all tracked sites, while W3.CSS went from 0.13% to 0.12%. W3.CSS is gaining ground faster in our index.

How many sites use both Bootstrap and W3.CSS?

270 websites in our catalog use both Bootstrap and W3.CSS.

Where does this Bootstrap vs W3.CSS 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.

Bootstrap vs W3.CSS — Site Stats Database

Bootstrap vs W3.CSS

A side-by-side comparison of two ui & css frameworks, based on the 204,967 UI Framework sites tracked by Site Stats Database.

Last updated July 1, 2026

Metric	Bootstrap	W3.CSS
Websites	126,851	1,051
Market share	62%	0.51%
Share of top 10K sites	9.8%	0.10%

Rank	#1	#12

Median DR	29	23

Average DR	32	26

Median keywords	919	810

Median referring domains	396	274

Median domain age	15 yrs	15 yrs

Average domain age	16 yrs	16 yrs

Average monthly traffic	73,491	76,577

Combined monthly traffic	9,322,399,969	80,482,793

merriam-webster.com
LanguageEnglish
DR (Ahrefs)91
Total Keywords4,579,269
Referring Domains240,838
Domain Age27 yrs
Traffic (Jun 2026)1,467,281,883
Traffic Trend
TechnologyBootstrap
rapidtables.com
LanguageEnglish
DR (Ahrefs)79
Total Keywords410,849
Referring Domains12,076
Domain Age19 yrs
Traffic (Jun 2026)177,772,574
Traffic Trend
Technology
bbc.com
LanguageEnglish
DR (Ahrefs)93
Total Keywords3,887,532
Referring Domains716,813
Domain Age36 yrs
Traffic (Jun 2026)145,867,646
Traffic Trend
TechnologyBootstrap
bestbuy.com
LanguageEnglish
DR (Ahrefs)89
Total Keywords3,771,049
Referring Domains112,318
Domain Age32 yrs
Traffic (Jun 2026)127,973,459
Traffic Trend
TechnologyBootstrap
nps.gov
LanguageEnglish
DR (Ahrefs)92
Total Keywords1,563,784
Referring Domains315,622
Domain Age28 yrs
Traffic (Jun 2026)121,452,048
Traffic Trend
TechnologyBootstrap
cdc.gov
LanguageEnglish
DR (Ahrefs)93
Total Keywords1,815,374
Referring Domains779,287
Domain Age28 yrs
Traffic (Jun 2026)118,289,737
Traffic Trend
TechnologyBootstrap
usps.com
LanguageEnglish
DR (Ahrefs)91
Total Keywords571,869
Referring Domains122,171
Domain Age28 yrs
Traffic (Jun 2026)105,769,868
Traffic Trend
TechnologyBootstrap
go.com
LanguageEnglish
DR (Ahrefs)92
Total Keywords913,868
Referring Domains604,602
Domain Age28 yrs
Traffic (Jun 2026)72,794,971
Traffic Trend
TechnologyBootstrap
byjus.com
LanguageEnglish
DR (Ahrefs)80
Total Keywords1,666,559
Referring Domains55,721
Domain Age13 yrs
Traffic (Jun 2026)65,601,851
Traffic Trend
TechnologyBootstrap
footballdb.com
LanguageEnglish
DR (Ahrefs)55
Total Keywords264,264
Referring Domains3,634
Domain Age23 yrs
Traffic (Jun 2026)54,434,822
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
merriam-webster.com	English	91	4,579,269	240,838	27 yrs	1,467,281,883		Bootstrap

tcgplayer.com
LanguageEnglish
DR (Ahrefs)82
Total Keywords534,734
Referring Domains19,103
Domain Age21 yrs
Traffic (Jun 2026)21,710,744
Traffic Trend
TechnologyW3.CSS
w3schools.com
LanguageEnglish
DR (Ahrefs)92
Total Keywords460,584
Referring Domains130,164
Domain Age26 yrs
Traffic (Jun 2026)19,645,294
Traffic Trend
Technology
skyward.com
Language
DR (Ahrefs)72
Total Keywords14,088
Referring Domains2,518
Domain Age30 yrs
Traffic (Jun 2026)2,570,806
Traffic Trend
TechnologyW3.CSS
purplemath.com
LanguageEnglish
DR (Ahrefs)70
Total Keywords67,496
Referring Domains4,507
Domain Age26 yrs
Traffic (Jun 2026)2,543,656
Traffic Trend
Technology
snapon.com
LanguageDutch
DR (Ahrefs)76
Total Keywords88,974
Referring Domains8,600
Domain Age31 yrs
Traffic (Jun 2026)2,452,232
Traffic Trend
TechnologyW3.CSS
mycutegraphics.com
LanguageEnglish
DR (Ahrefs)46
Total Keywords30,874
Referring Domains6,196
Domain Age20 yrs
Traffic (Jun 2026)2,322,689
Traffic Trend
Technology
everydaycalculation.com
LanguageEnglish
DR (Ahrefs)43
Total Keywords133,024
Referring Domains1,203
Domain Age13 yrs
Traffic (Jun 2026)2,256,594
Traffic Trend
Technology
miniwebtool.com
LanguageEnglish
DR (Ahrefs)70
Total Keywords157,726
Referring Domains5,437
Domain Age16 yrs
Traffic (Jun 2026)2,045,403
Traffic Trend
Technology
shedsforlessdirect.com
LanguageEnglish
DR (Ahrefs)26
Total Keywords20,031
Referring Domains1,662
Domain Age19 yrs
Traffic (Jun 2026)948,401
Traffic Trend
Technology
zinus.com
LanguageEnglish
DR (Ahrefs)64
Total Keywords13,871
Referring Domains1,959
Domain Age26 yrs
Traffic (Jun 2026)888,666
Traffic Trend
TechnologyW3.CSS