Discourse

Discourse is a modern forum engine that goes beyond typical discussion boards by integrating membership features directly into the platform. It supports tiered subscriptions, recurring billing through Stripe, and advanced moderation tools that scale from small communities to enterprise deployments. The platform is self-hosted (or cloud-managed), giving you full control over member data and revenue flows.

Best for communities that want forums as their core hub and need direct billing integration with recurring charges. Discourse attracts moderators and creators who value transparency and open-source flexibility, and it's especially strong when you want members engaging through threaded discussions rather than other content formats.