Tumblr
386,778 websites

Tumblr is free to use

http://tumblr.com

Tumblr is a re-envisioning of tumblelogging, a subset of blogging that uses quick, mixed-media posts. The service hopes to do for the tumblelog what services like LiveJournal and Blogger did for the blog. The difference is that its extreme ...

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uCoz
19,518 websites

uCoz offers both free and paid options

http://ucoz.com

uCoz is a free website builder that is suitable for both web professionals and newbies. It offers 250+ default templates and supports full design customization. 21 uCoz modules can be simply combined to build a full-fledged website, or used...

Market Share by Top Websites

1 Tumblr is leading in Top 1M Sites and The Entire Web.

2 uCoz is leading in Top 10K Sites and Top 100K Sites.

Websites Categories

1 Tumblr has better usage coverage in more websites categories. Including Arts & Entertainment, Adult, Games, Lifestyle and 17 other categories.

2 uCoz is leading in Science & Education, Law & Government and Heavy Industry & Engineering.

Geography

1 Tumblr is leading in most countries, including United States, Canada, United Kingdom, Germany and 141 other countries.

2 uCoz is leading in Russia, Ukraine, Belarus, Kazakhstan and 8 other countries.