When comparing Flarum vs phpBB, the Slant community recommends Flarum for most people. In the question“What are the best web forum software packages?” Flarum is ranked 3rd while phpBB is ranked 9th.
Ranked in these QuestionsQuestion Ranking
Pro Very fast loading time
Pro Based on (but not built with) Laravel
Flarum was originally based on Laravel and uses the Eloquent ORM. But it is not a traditional Laravel software.
Pro Open source
Source code is available on GitHub under GNU General Licence.
Con Slow development
Development moves at a glacial pace.
Con Very complicated installation process on shared hosts
This is not a MySQL+PHP application. it is impossible or very hard to install on shared hosts compared to vanilla or phpbb.
Not optimized for slow connections.
Con Outdated look and feel
Even the latest version of the software looks like the typical '90s forums which is now pretty outdated.