A platform for community discussion. Free, open, simple.
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Latest commit 6c334c3 Oct 22, 2016 @coding-horror coding-horror committed on GitHub Update INSTALL-cloud.md
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.tx Merge remote-tracking branch 'upstream/master' into update-locale-vie… Jan 26, 2016
app Merge pull request #4508 from kstaikov/mailing_list_exclude_own_replies Oct 22, 2016
bin Switch from hard-coded image version to 'latest' Sep 22, 2016
config Merge pull request #4508 from kstaikov/mailing_list_exclude_own_replies Oct 22, 2016
db PERF: Remove ordering by username. Oct 14, 2016
docs Update INSTALL-cloud.md Oct 23, 2016
images fix image location Sep 11, 2014
lib FIX: email styling with blacklisted iframes Oct 21, 2016
log Initial release of Discourse Feb 5, 2013
packaging/debian Fix .pkgr.yml so that discourse can be packaged with https://pkgr.io. Mar 26, 2014
plugins Fix more deprecations: Oct 21, 2016
public Update Translations Oct 20, 2016
script Merge pull request #4493 from pfaffman/mbox-email-to-username Oct 12, 2016
spec Merge pull request #4508 from kstaikov/mailing_list_exclude_own_replies Oct 22, 2016
test FEATURE: add a setting to allow url schemes other than http(s) Oct 21, 2016
vendor FEATURE: show timeline component when expanding post progress Oct 19, 2016
.codeclimate.yml FEATURE: Replace composer editor with ember version Nov 6, 2015
.editorconfig Set trim_trailing_whitespace false for markdown Jun 25, 2016
.env.sample Basic Heroku integration Mar 13, 2013
.eslintignore REFACTOR: PreloadStore to ES6 Jul 11, 2016
.eslintrc Lint inner function declarations to prevent Safari breakage Jul 14, 2016
.gitattributes prevent crlf on yml files Apr 5, 2013
.gitignore Merge pull request #4366 from xfalcox/print Oct 11, 2016
.image_optim.yml let's try optipng instead Jul 22, 2015
.mention-bot Calibrating mention-bot (#4286) Jun 23, 2016
.pkgr.yml Fix .pkgr.yml so that discourse can be packaged with https://pkgr.io. Mar 26, 2014
.rspec Initial release of Discourse Feb 5, 2013
.ruby-gemset.sample rvm has offically depreicated .rvmrc and recommends using .ruby-versi… May 23, 2013
.ruby-version.sample Bump .ruby-version Sep 29, 2016
.travis.yml Add more plugins to test for. Aug 19, 2016
Brewfile Adjust Brewfile to follow homebrew-bundle syntax Aug 11, 2015
CONTRIBUTING.md Proper long form for CLA Sep 10, 2015
COPYRIGHT.txt fix trademark Jun 26, 2013
Gemfile Revert "why are we loading all these test gems in debug?" Oct 19, 2016
Gemfile.lock FIX: Improve removing advanced filters Oct 14, 2016
LICENSE.txt Initial release of Discourse Feb 5, 2013
Procfile Standardize on 'worker' for sidekiq Procfile entry (expected by build… Oct 8, 2013
README.md Bump minimum Ruby version to 2.3. Jun 10, 2016
Rakefile Mark all files with a shebang line as executable May 12, 2015
Vagrantfile fix link to result in instant download Jun 2, 2016
adminjs Initial release of Discourse Feb 5, 2013
config.ru Allow running discourse with prefix with passenger without requiring … Apr 10, 2013
discourse.sublime-project FEATURE: better email in support Jan 18, 2016
jsapp Initial release of Discourse Feb 5, 2013



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 discourse.org.


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 2.3+, 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.org/buy.


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

Browsers Tablets Smartphones
Safari 6.1+ iPad 2+ iOS 7+
Google Chrome 23+ Android 4.3+ Android 4.3+
Internet Explorer 11+ Windows 8 Windows Phone 8
Firefox 16+

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 discourse.org. 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. Always strive to collaborate with mutual respect.
  5. 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 - 2016 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.