Flarum

1. 1

   You obtain hosting. Flarum needs Apache with mod_rewrite or Nginx, PHP 7.3 or newer with the curl, dom, fileinfo, gd, json, mbstring, openssl, pdo_mysql, tokenizer, and zip extensions, and MySQL 5.6 or newer or MariaDB 10.0.5 or newer. A $5 to $20 a month virtual server or ordinary shared hosting is enough for most communities.

2. 2

   You install it, either by uploading a prepackaged archive built for your PHP version or by running composer create-project from the command line. Command line access is required either way for maintenance tasks, so this is not a one click product for someone who has never used a terminal.

3. 3

   You structure the community with tags rather than rigid categories. Tags can be primary or secondary, nested one level, restricted to specific user groups, and applied in combination, which is a more flexible model than the fixed board hierarchy older forum software imposes.

4. 4

   You set permissions per group. Groups control who can see a tag, start a discussion, reply, edit, flag, or moderate, which is how a public forum with a private members area is built without a second product.

5. 5

   You extend it. Extensions are installed with Composer and enabled from the admin panel, covering single sign on, custom user fields, private messaging, polls, gamification, spam control, search improvements, and integrations. The unofficial Extiverse marketplace lists both free and premium extensions.

6. 6

   You keep it running. Updates are a Composer command, backups are your responsibility, and the security of the server is yours. This is the cost that does not appear on any price list and the reason most small businesses eventually pay someone else instead.

Free and open source under the MIT licence. There is no subscription, no per member fee, and no transaction fee. Costs are hosting, optional premium extensions, and your own maintenance time.

Value assessment: On pure capability per dollar, nothing else in this category is close, because the denominator is hosting. Unlimited members, unlimited moderators, permanent history, complete data ownership, your own domain, full white labelling, source access, and public content that Google indexes, for the price of a small virtual server, is a proposition no hosted vendor can match on price. The cost is entirely in operations and scope. You are the sysadmin, the security patcher, and the person who works out why an extension broke on upgrade, and you get a forum rather than a platform: no courses, no events, no checkout, no chat, no app. The right way to evaluate it is to price your own time. A technically confident operator running a free public community should almost certainly use Flarum and spend the saved subscription on hosting and coffee. A non technical founder who wants to sell a membership should not, because everything Flarum does not do is exactly the part they need.

Setup time

An hour for a technical operator using the prepackaged archive, a day to configure tags, groups, permissions, extensions, and theming properly. Considerably longer if you have never deployed a PHP application.

Learning curve

Low for members, who face a clean and obvious interface. Moderate for administrators, mainly because the permission model is group based and every capability is configured separately. High for anyone who has not administered a server before, since Composer and command line access are unavoidable.

Onboarding

There is no onboarding, because there is no vendor. Documentation at docs.flarum.org is good, and the official forum at discuss.flarum.org is the support channel. Third party developers and small agencies offer paid installation and customization.

Migration notes

Importers exist from older forum software including phpBB, vBulletin, and XenForo, with varying quality and community maintenance. Moving out is the easiest in this category by a wide margin because your data is in your own MySQL database: you can export it, transform it, or move it wherever you like without asking anyone's permission or losing anything. That single fact is the strongest argument for self hosting over any product on this page.

Platforms

Self hosted web applicationResponsive mobile webNo native or branded mobile apps

API

A documented REST API plus a Laravel based extension framework with frontend and backend extenders, so custom functionality is written as a normal PHP package.

Compliance

Whatever you implement yourself; there is no vendor certification of any kind

Data residency

Entirely your choice, because you choose the server. This is one of the few products in this category where EU data residency is trivially satisfied.

SSO

Available through community extensions rather than the core, including OAuth providers and custom SSO against your own application.

Security notes

Built on Laravel with regular security releases from the Flarum Foundation, but patching, server hardening, backups, and TLS are entirely your responsibility. There is no managed security posture, no penetration test report, and no SOC 2.

Channels

Community support onlyPaid help available from independent developers and small agencies

Documentation

Thorough documentation at docs.flarum.org covering installation, requirements, extension development, and the 2.0 upgrade path.

Community

An active official forum at discuss.flarum.org, which itself runs on Flarum 2.0 in production, plus GitHub and the unofficial Extiverse marketplace.

Founded

2014

Headquarters

Distributed; stewarded by the Flarum Foundation

Ownership

Open source, MIT licensed, stewarded by the Flarum Foundation

Founders

Toby Zerner, Franz Liedke

Employees

None; a volunteer project with a foundation and a small group of maintainers

Funding

No venture funding. Development began after Toby Zerner cancelled a Kickstarter campaign in December 2014 in order to open source the project. The Flarum Foundation now stewards the work, supported by donations and sponsorship.

Flarum is the right answer for a technically capable operator running a free, public, discussion first community, and the wrong answer for almost anyone selling something. What it offers is unmatched at the price: unlimited members, permanent history, complete data ownership, your own domain with no vendor branding, source access under the MIT licence, and every public discussion indexed by Google as a page you own, all for the cost of a small server. At $50,000 a month in member revenue it costs you nothing where Circle would take about $1,600 and Patreon more than $6,750. The costs are operational and scoped. You are the sysadmin, the patcher, and the person who fixes the extension that broke on upgrade, and you get a forum and nothing else: no checkout, no courses, no events, no chat, no app, and no automated spam filter without an extension. If you want the strongest forum with a vendor behind it, Discourse is better and worth paying for. If you want the lightest one you can host anywhere for five dollars and modify however you like, Flarum is excellent and has been quietly underrated for a decade.

Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.