World Beyblade Organization by Fighting Spirits Inc.

I would have to say Google because of there google doodles and because I just use that more.

This topic already exists :
http://worldbeyblade.org/Thread-Google-or-Bing

Make sure to always use the Search function before creating new threads, to make sure we do not already have them. This site is over five years old, so we definitely already covered most good subjects.