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Bootstrap vs UIKit

Bootstrap runs on 1,244,348 ranked sites (12.5%); UIKit on 49,378 (0.5%).

By rank tier
TierBootstrapShareUIKitShare
Top 1,000454.5%10.1%
Top 10,0006236.2%150.1%
Top 100,0007,8847.9%2060.2%
Top 1,000,00086,5568.7%2,8220.3%
All ranked1,244,34812.5%49,3780.5%
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 UIKit
#249brookings.edu
#1,115midi.org
#1,384edtrust.org
#1,576iab.com
#2,550uptimeinstitute.com
#3,035www.nhs.uk
#3,615dvidshub.net
#5,034datarobot.com
#6,126litespeedtech.com
#6,583fib-international.org