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A platform for community discussion. Free, open, simple.
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.tx Simplify the pull_translations script
app temporarily add back compiler while figuring out a better system
bin docker dev binaries
config temporarily add back compiler while figuring out a better system
db Rename `ninja_edit_window` to `editing_grace_period` :'(
docs Digital Ocean should be DigitalOcean…
images fix image location
lib FIX: show letter avatars even if NGINX is not running in Dev mode
log Initial release of Discourse
packaging/debian Fix .pkgr.yml so that discourse can be packaged with
plugins FIX: use an algorithm that doesn't re-order percentages when rounding…
public Update Translations
script add Phorum importer
spec FIX: site_contact_user should default to system user, not first admin…
test correct production mode due to ember loading changes
vendor SECURITY: Backported XSS fixes from Handlebars
.codeclimate.yml FEATURE: Replace composer editor with ember version
.editorconfig set indent_style to valid value
.env.sample Basic Heroku integration
.eslintignore FEATURE: Replace composer editor with ember version
.eslintrc Add semi colon linting to Javascript
.gitattributes prevent crlf on yml files
.gitignore ignore 'public/csv/'
.image_optim.yml let's try optipng instead
.pkgr.yml Fix .pkgr.yml so that discourse can be packaged with
.rspec Initial release of Discourse
.ruby-gemset.sample rvm has offically depreicated .rvmrc and recommends using .ruby-versi…
.ruby-version.sample rvm has offically depreicated .rvmrc and recommends using .ruby-versi…
.travis.yml FEATURE: upgrade to Rails 4.2.4
Brewfile Adjust Brewfile to follow homebrew-bundle syntax Proper long form for CLA
COPYRIGHT.txt fix trademark
Gemfile SECURITY: Backported XSS fixes from Handlebars
Gemfile.lock SECURITY: Backported XSS fixes from Handlebars
LICENSE.txt Initial release of Discourse
Procfile Standardize on 'worker' for sidekiq Procfile entry (expected by build… Update
Rakefile Mark all files with a shebang line as executable
Vagrantfile Change Vagrantfile to default VM 1024MB of RAM
adminjs Initial release of Discourse Allow running discourse with prefix with passenger without requiring …
discourse.sublime-project add vendor folder in sublime project
jsapp Initial release of Discourse


Discourse is the 100% open source discussion platform built for the next decade of the Internet. It works as:

  • a mailing list
  • a discussion forum
  • a long-form chat room

To learn more about the philosophy and goals of the project, visit


Atom   Soylent

Browse lots more notable Discourse instances.


  1. If you're brand new to Ruby and Rails, please see Discourse as Your First Rails App or our Discourse Vagrant Developer Guide, which includes a development environment in a virtual machine.

  2. If you're familiar with how Rails works and are comfortable setting up your own environment, use our Discourse Advanced Developer Guide.

Before you get started, ensure you have the following minimum versions: Ruby 2.0.0+, PostgreSQL 9.3+, Redis 2.6+. If you're having trouble, please see our TROUBLESHOOTING GUIDE first!

Setting up Discourse

If you want to set up a Discourse forum for production use, see our Discourse Install Guide.

If you're looking for business class hosting, see


Discourse is built for the next 10 years of the Internet, so our requirements are high:

Browsers Tablets Smartphones
Safari 5.1+ iPad 2+ iOS 7+
Google Chrome 23+ Android 4.1+ Android 4.1+
Internet Explorer 10+ Windows 8 Windows Phone 8
Firefox 16+

Internet Explorer 9.0 will no longer be supported in 2016.

Built With

  • Ruby on Rails — Our back end API is a Rails app. It responds to requests RESTfully in JSON.
  • Ember.js — Our front end is an Ember.js app that communicates with the Rails API.
  • PostgreSQL — Our main data store is in Postgres.
  • Redis — We use Redis as a cache and for transient data.

Plus lots of Ruby Gems, a complete list of which is at /master/Gemfile.


Build Status Code Climate

Discourse is 100% free and open source. We encourage and support an active, healthy community that accepts contributions from the public – including you!

Before contributing to Discourse:

  1. Please read the complete mission statements on Yes we actually believe this stuff; you should too.
  2. Read and sign the Electronic Discourse Forums Contribution License Agreement.
  3. Dig into CONTRIBUTING.MD, which covers submitting bugs, requesting new features, preparing your code for a pull request, etc.
  4. Not sure what to work on? We've got some ideas.

We look forward to seeing your pull requests!


We take security very seriously at Discourse; all our code is 100% open source and peer reviewed. Please read our security guide for an overview of security measures in Discourse, or if you wish to report a security issue.

The Discourse Team

The original Discourse code contributors can be found in AUTHORS.MD. For a complete list of the many individuals that contributed to the design and implementation of Discourse, please refer to the official Discourse blog and GitHub's list of contributors.

Copyright / License

Copyright 2014 - 2015 Civilized Discourse Construction Kit, Inc.

Licensed under the GNU General Public License Version 2.0 (or later); you may not use this work except in compliance with the License. You may obtain a copy of the License in the LICENSE file, or at:

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Discourse logo and “Discourse Forum” ®, Civilized Discourse Construction Kit, Inc.


Discourse is built with love, Internet style.

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