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FlatBB

Visit FlatBB

Free open-source forum you install by unzipping a folder, with SQLite or MySQL support.

FlatBB in use
Launched
Clicks
10
Categories
Developer tools,Open source,Communication
Runs on
Self-hosted, Web
Pricing
Free

About FlatBB

FlatBB is an open-source forum in plain PHP 8.1+. No Composer, no Docker, no build step — unzip and install on cheap shared hosting (SQLite or MySQL). Multilingual + built-in RTL, Markdown, search, dark mode, core points system, AI-friendly plugin marketplace. Easy to self-host, extend, and customize for small communities and teams.

Written up on SpacerrApps

FlatBB Is a Forum You Install YourselfFlatBB is a free, self-hosted PHP forum for small communities. This overview explains its setup, storage options, extension model, and trade-offs before choosing it.September 15, 2026 · 4 min read

2 comments

  1. Zofia Kowalska

    Does FlatBB include tools to import users and posts from an existing forum?

  2. Tomas Keller

    Can the points system be customized or replaced through plugins?

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