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Bootstrap vs Pure CSS

Bootstrap runs on 1,244,348 ranked sites (12.5%); Pure CSS on 5,339 (0.1%).

By rank tier
TierBootstrapSharePure CSSShare
Top 1,000454.5%10.1%
Top 10,0006236.2%80.1%
Top 100,0007,8847.9%630.1%
Top 1,000,00086,5568.7%5330.1%
All ranked1,244,34812.5%5,3390.1%
Top 10 using Bootstrap
#50t.me
#54bootstrapcdn.com
#67bbc.com
#72doi.org
#80apache.org
#83cdc.gov
#93un.org
#247telegram.me
#258postgresql.org
#269archives.gov
Top 10 using Pure CSS
#603gnupg.org
#3,074nedic.ca
#4,422uni-hannover.de
#5,121docs.rs
#5,982reviewtrackers.com
#6,225irfanview.com
#8,840alpinelinux.org
#9,054yahooapis.com
#10,478deviceatlas.com
#12,437freelogodesign.org