DiscourseToolOpen-source platform for community discussion PricingOpen Source DeploymentCloud · Self Hosted APIAvailableStartupToolbox·Jun 30, 2026Discourse is a free, open-source forum and community discussion platform that can be self-hosted or run on Discourse's managed hosting. It offers modern threaded discussions, trust levels, and a RESTful JSON API.Alternative toFlarum|NNodeBB|PphpBB
FlarumToolBeautiful, fast, free open-source forum software PricingFree tier DeploymentSelf Hosted APIAvailableStartupToolbox·Jun 30, 2026Flarum is free, open-source forum software for building community discussion platforms. It offers a modern, fast, extensible experience with real-time updates, moderation tools, and a plugin ecosystem.Alternative toDiscourse|PphpBB|NNodeBB
Spectrum.chatToolCommunity discussions inside your GitHub repo PricingFree tier DeploymentCloud APIAvailableStartupToolbox·Jun 30, 2026GitHub Discussions is a forum built into GitHub repositories where communities ask questions, share ideas, and hold conversations that do not fit issues or pull requests. It is the successor experience after Spectrum.chat.Alternative toDiscourse|Discord|Slack