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.tx Add Hungarian locale (#6260) Aug 12, 2018
app FIX: Regularly reset unknown extension of uploads Aug 21, 2019
bin DEV: Mount plugin symlinks to dev docker container (#8002) Aug 14, 2019
config Revert "FEATURE: Publish read state on group messages. (#7989) [Undo … Aug 20, 2019
db Revert "FEATURE: Publish read state on group messages. (#7989) [Undo … Aug 20, 2019
docs Update Aug 20, 2019
images fix image location Sep 11, 2014
lib Rename `lazyYT` plugin directory name to `lazy-yt` Aug 21, 2019
log Initial release of Discourse Feb 5, 2013
packaging/debian Fix .pkgr.yml so that discourse can be packaged with Mar 26, 2014
plugins Rename `lazyYT` plugin directory name to `lazy-yt` Aug 21, 2019
public FEATURE: Embed topics list on remote sites via Javascript API. (#8008) Aug 15, 2019
script DEV: User simulator tried to modify frozen string. Aug 16, 2019
spec FIX: Regularly reset unknown extension of uploads Aug 21, 2019
test DEV: attempts to fix an heisentest in date-time-input-range (#8017) Aug 19, 2019
vendor DEV: updates lodash to 4.17.13 (#7883) Jul 11, 2019
.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 DEV: Yarn-manage moment and moment-timezone libraries Feb 12, 2019
.eslintrc DEV: prevents asyncTestDiscourse/controllerFor/fixture to leak (#7717) Jun 6, 2019
.gitattributes Use proper encoding for email fixtures. Feb 21, 2018
.gitignore Rename `lazyYT` plugin directory name to `lazy-yt` Aug 21, 2019
.pkgr.yml Fix .pkgr.yml so that discourse can be packaged with Mar 26, 2014
.prettierignore DEV: Prettify *.en_US.yml files May 20, 2019
.rspec DEV: Use `--profile` and `--fail-fast` in CI only Mar 12, 2019
.rspec_parallel DEV: Introduce parallel rspec testing Apr 1, 2019
.rubocop.yml DEV: Re-enable Rubocop checks for plugins Jul 30, 2019
.ruby-gemset.sample rvm has offically depreicated .rvmrc and recommends using .ruby-versi… May 23, 2013
.ruby-version.sample chore: bump ruby version in .ruby-version (#7552) May 15, 2019
.travis.yml s/discourse-staff-notes/discourse-user-notes (#7936) Jul 24, 2019
Brewfile DEV: enable frozen string literal on all files May 13, 2019 Proper long form for CLA Sep 10, 2015
COPYRIGHT.txt fix trademark Jun 26, 2013
Dangerfile FEATURE: English locale with international date formats May 20, 2019
Gemfile Bump onebox version. Aug 21, 2019
Gemfile.lock Bump onebox version. Aug 21, 2019
LICENSE.txt Initial release of Discourse Feb 5, 2013 Browser version bump Mar 25, 2019
Rakefile DEV: enable frozen string literal on all files May 13, 2019
adminjs Initial release of Discourse Feb 5, 2013 DEV: enable frozen string literal on all files May 13, 2019
d add wrappers for mailcatcher and sidekiq Dec 12, 2016
discourse.sublime-project DEV: Exclude i18n .yml files from Sublime Text project. (#6473) Oct 10, 2018
jsapp Initial release of Discourse Feb 5, 2013
lefthook.yml DEV: Replace Overcommit with Lefthook (#7826) Jul 2, 2019
package.json FEATURE: Make Discourse work offline with WorkboxJS (#7870) Jul 15, 2019
yarn.lock DEV: Set version to 4.17.14 for lodash-cli Jul 17, 2019

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


Boing Boing


Browse lots more notable Discourse instances.


To get your environment setup, follow the community setup guide for your operating system.

  1. If you're on macOS, try the macOS development guide.
  2. If you're on Ubuntu, try the Ubuntu development guide.
  3. If you're on Windows, try the Windows 10 development guide.

If you're familiar with how Rails works and are comfortable setting up your own environment, you can also try out the Discourse Advanced Developer Guide, which is aimed primarily at Ubuntu and macOS environments.

Before you get started, ensure you have the following minimum versions: Ruby 2.5+, PostgreSQL 10+, 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 Phones
Safari 10+ iPad 4+ iOS 10+
Google Chrome 57+ Android 4.4+ Android 4.4+
Internet Explorer 11+
Firefox 52+

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

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. 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 - 2019 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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