Discourse
7,414 websites

Discourse is free to use

http://www.discourse.org/

Discourse is the 100% open source discussion platform built for the next decade of the Internet. It works as a mailing list, a discussion forum and a long-form chat room.Discourse is a simple, flat forum, where replies flow down the page in...

VS

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.

Market Share by Top Websites

1 Discourse is leading in Top 10K Sites, Top 100K Sites and The Entire Web.

2 SMF is leading in Top 1M Sites.

Websites Categories

1 SMF has better usage coverage in more websites categories. Including Games, Vehicles, Arts & Entertainment, Sports and 12 other categories.

2 Discourse is leading in Computers Electronics & Technology, Science & Education, Finance, Law & Government and 4 other categories.

Geography

1 Discourse is leading in most countries, including United States, Germany, United Kingdom, India and 96 other countries.

2 SMF is leading in Russia, Thailand, Poland, Spain and 37 other countries.