A platform for community discussion. Free, open, simple.
Ruby JavaScript HTML CSS Shell
Switch branches/tags
Latest commit b6e8281 Feb 21, 2018
Failed to load latest commit information.
.tx FIX: Update translations job was aborting at discourse-presence Dec 6, 2017
app Flag badge too wide in header panels Feb 20, 2018
bin avoid getting duplicates in docker dev paths Dec 14, 2017
config New setting: minimum trust level to embed images in a post Feb 21, 2018
db PERF: a faster way to count tags used per category Feb 12, 2018
docs Update INSTALL-cloud.md Feb 17, 2018
images fix image location Sep 11, 2014
lib New setting: minimum trust level to embed images in a post Feb 21, 2018
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 Update translations Feb 15, 2018
public Update translations Feb 15, 2018
script minor changes to discourse bench Feb 20, 2018
spec Fix rspec description. Feb 21, 2018
test FEATURE: New site setting for additional allowed filetypes for staff (#… Feb 19, 2018
vendor Set caret-clone position based on rtl class Jan 19, 2018
.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 FEATURE: Allow plugins to register a new locale Jan 25, 2018
.eslintrc select-kit refactoring Dec 22, 2017
.gitattributes Revert "Upgrade mail gem to drop dependency on `mime-types`." Feb 15, 2018
.gitignore PERF: run post timings in background Jan 18, 2018
.overcommit.yml Add overcommit configuration file Nov 21, 2017
.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
.rubocop.yml exclude public directory from RuboCop Nov 2, 2017
.ruby-gemset.sample rvm has offically depreicated .rvmrc and recommends using .ruby-versi… May 23, 2013
.ruby-version.sample Bump ruby version May 16, 2017
.travis.yml Support ruby 2.5.0 Jan 9, 2018
Brewfile Switch to chrome headless mode instead of phantomjs. Dec 19, 2017
CONTRIBUTING.md Proper long form for CLA Sep 10, 2015
COPYRIGHT.txt fix trademark Jun 26, 2013
Gemfile bump onebox Feb 20, 2018
Gemfile.lock bump onebox Feb 20, 2018
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 Update screenshots on Readme Apr 25, 2017
Rakefile Add rubocop to our build. (#5004) Jul 28, 2017
Vagrantfile fix link to result in instant download Jun 2, 2016
adminjs Initial release of Discourse Feb 5, 2013
config.ru FEATURE: allow plugins to easily detect if running in Rack Nov 15, 2017
d add wrappers for mailcatcher and sidekiq Dec 12, 2016
discourse.sublime-project [DEV] fixes sublime text 2 project loading issue Nov 9, 2017
jsapp Initial release of Discourse Feb 5, 2013
package.json Add eslint and babel-eslint to yarn dev dependencies. Dec 22, 2017
yarn.lock Add eslint and babel-eslint to yarn dev dependencies. Dec 22, 2017



Discourse is the 100% open source discussion platform built for the next decade of the Internet. Use it as a:

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

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


Boing Boing


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 Phones
Safari 6.1+ iPad 3+ iOS 8+
Google Chrome 32+ Android 4.3+ Android 4.3+
Internet Explorer 11+
Firefox 27+

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 - 2017 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.