The best Simple Machines Forum alternatives

NodeBB suits organizations building a forum, brand community, or product support board.

Discourse may suit organizations that want to run a discussion community through self-hosting or managed hosting.

Forums.net is intended for organizations and businesses creating communities for groups such as superfans, friends or employees.

Flarum suits communities ranging from small hobby groups to large enterprise forums.

Khoros Communities suits brands seeking to build and scale customer self-service, peer support, engagement, and collaboration.