SMF
6,495 websites

SMF is free to use

http://www.simplemachines.org/

Simple Machines Forum is a free, professional grade software package that allows you to set up your own online community within minutes.

VS

vBulletin 5.x
1,230 websites

vBulletin 5.x costs money

http://www.vbulletin.com

vBulletin is a professional, affordable community forum solution. Thousands of clients, including many industry leading blue chip companies, have chosen vBulletin - It's the ideal choice for any size of community.

Market Share by Top Websites

1 SMF is leading in Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, vBulletin 5.x is clearly lagging behind, losing to SMF in all segments.

Websites Categories

1 SMF has better usage coverage in more websites categories. Including Computers Electronics & Technology, Games, Vehicles, Arts & Entertainment and 20 other categories.

2 vBulletin 5.x hasn't got a lead over SMF in any websites category.

Geography

1 SMF is leading in most countries, including United States, Russia, Germany, Thailand and 102 other countries.

2 vBulletin 5.x is leading in Bangladesh, Saudi Arabia, Egypt, Algeria and 8 other countries.