You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Gerhard Schlager 7c30986b5e FIX: Failed to notify user after restoring backup 2 days ago
.github/workflows DEV: Fix the CI workflow 1 week ago
.tx Add Hungarian locale (#6260) 1 year ago
app FIX: add 'noindex' header to rss feed responses. 3 days ago
bin DEV: resolve symlinks in docker dev 2 weeks ago
config FEATURE: Replace existing badge owners when using the bulk award feature (#8770) 4 days ago
db FIX: Don't cause exceptions due to rename of `reply_id` column 1 week ago
docs FIX: Split migration into two steps in developer guide (#8103) 4 months ago
images fix image location 5 years ago
lib FIX: Failed to notify user after restoring backup 2 days ago
log Initial release of Discourse 7 years ago
plugins FIX: Do not extract dates from quotes and Oneboxes (#8754) 6 days ago
public Revert "FIX: lower case URLs before comparing for embedding comments" 4 days ago
script Merge pull request #8736 from gschlager/rename_reply_id_column 1 week ago
spec FIX: add 'noindex' header to rss feed responses. 3 days ago
test UX: Use '-' as default category slug (#8607) 4 days ago
vendor Upgrade handlebars (#8675) 2 weeks ago
.editorconfig Set trim_trailing_whitespace false for markdown 3 years ago
.eslintignore DEV: Yarn-manage moment and moment-timezone libraries 11 months ago
.eslintrc DEV: uses central eslint-config-discourse (#8150) 3 months ago
.gitattributes Use proper encoding for email fixtures. 1 year ago
.gitignore REFACTOR: Restoring of backups and migration of uploads to S3 1 week ago
.prettierignore DEV: Prettify *.en_US.yml files 8 months ago
.rspec DEV: Use `--profile` and `--fail-fast` in CI only 10 months ago
.rspec_parallel DEV: Introduce parallel rspec testing 10 months ago
.rubocop.yml Fix DiscourseCops/NoURIEscapeEncode errors and re-enable 1 month ago
.ruby-gemset.sample rvm has offically depreicated .rvmrc and recommends using .ruby-version and .ruby-gemset instead. 6 years ago
.ruby-version.sample Make version the same as install docs (#8713) 2 weeks ago
.travis.yml Fix frontend tests on Travis (#8089) 4 months ago
Brewfile DEV: enable frozen string literal on all files 8 months ago Proper long form for CLA 4 years ago
COPYRIGHT.txt fix trademark 6 years ago
Dangerfile FEATURE: English locale with international date formats 8 months ago
Gemfile DEV: revert upgrade of rack to version 2.0.8 2 weeks ago
Gemfile.lock Build(deps-dev): Bump ruby-prof from 1.1.0 to 1.2.0 (#8778) 3 days ago
LICENSE.txt Initial release of Discourse 7 years ago Update browser support matrix 2 weeks ago
Rakefile DEV: enable frozen string literal on all files 8 months ago
adminjs Initial release of Discourse 7 years ago DEV: enable frozen string literal on all files 8 months ago
d add wrappers for mailcatcher and sidekiq 3 years ago
discourse.sublime-project DEV: Exclude i18n .yml files from Sublime Text project. (#6473) 1 year ago
jsapp Initial release of Discourse 7 years ago
lefthook.yml Upgrade handlebars (#8675) 2 weeks ago
package.json Upgrade handlebars (#8675) 2 weeks ago
yarn.lock Upgrade handlebars (#8675) 2 weeks ago

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.

Discourse supports the latest, stable releases of all major browsers and platforms:

Browsers Tablets Phones
Apple Safari iPadOS iOS
Google Chrome Android Android
Microsoft Edge
Mozilla Firefox

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 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.