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Blake Erickson 544a9865c6 DEV: Add more API Doc specs for topic endpoints 20 hours ago
.github/workflows DEV: Update ImageMagick version in CI (#10080) 3 weeks ago
.tx Update translations 2 months ago
app FIX: Allow signup when auth provider supplies no email 21 hours ago
bin DEV: Add docker cleanup script to d/ folder 4 months ago
config FIX: Replace links to removed uploads from reviewables with a placeholder (#10180) 23 hours ago
db FEATURE: Implement support for IMAP and SMTP email protocols. (#8301) 1 day ago
docs import pkuczynski public key for RVM install (#10140) 1 week ago
images fix image location 5 years ago
lib FEATURE: Implement support for IMAP and SMTP email protocols. (#8301) 1 day ago
log Initial release of Discourse 7 years ago
plugins Remove `Discourse.SiteSettings` from tests (#10193) 1 day ago
public Update translations 2 weeks ago
script DEV: couple bug fixes in getsatisfaction importer 4 days ago
spec DEV: Add more API Doc specs for topic endpoints 20 hours ago
test DEV: Remove text-ellipsis component and use CSS line-clamp instead (#10196) 1 day ago
vendor DEV: ensures highlightjs is correctly tested (#9923) 1 month ago
.editorconfig Set trim_trailing_whitespace false for markdown 4 years ago
.eslintignore DEV: Remove global Handlebars 2 months ago
.eslintrc DEV: Ember linting - disallow Ember.* variable usage (#8782) 5 months ago
.git-blame-ignore-revs DEV: Add commit to ignore for git blame. 5 days ago
.gitattributes Use proper encoding for email fixtures. 2 years ago
.gitignore Add script for compiling copyright deposits (#9646) 2 months ago
.licensed.yml DEV: Add a basic licensed config (#10128) 2 weeks ago
.prettierignore DEV: Prettify *.en_US.yml files 1 year ago
.rspec DEV: Use `--profile` and `--fail-fast` in CI only 1 year ago
.rspec_parallel DEV: Introduce parallel rspec testing 1 year ago
.rubocop.yml DEV: Remove rubocop_todo which doesn't seem to work with plugins. 3 weeks ago
.ruby-gemset.sample rvm has offically depreicated .rvmrc and recommends using .ruby-version and .ruby-gemset instead. 7 years ago
.ruby-version.sample Make version the same as install docs (#8713) 5 months ago
.template-lintrc.js REFACTOR: require-valid-alt-text was duplicated (#9663) 2 months ago
Brewfile DEV: enable frozen string literal on all files 1 year ago Proper long form for CLA 4 years ago
COPYRIGHT.txt DOCS: remove thin from copyright 2 weeks ago
Dangerfile Rename many `.js.es6` files to `.js` 4 months ago
Gemfile DEV: upgrade rack to version 2.2.3 3 days ago
Gemfile.lock Build(deps): Bump cose from 1.0.0 to 1.1.0 (#10203) 1 day ago
LICENSE.txt Initial release of Discourse 7 years ago Replace Travis build status with Github Actions status 2 months ago
Rakefile DEV: enable frozen string literal on all files 1 year ago
adminjs Initial release of Discourse 7 years ago DEV: enable frozen string literal on all files 1 year ago
crowdin.yml DEV: Add configuration file for Crowdin 4 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 DEV: Check English locale for errors in CI 1 month ago
package.json DEV: Remove htmlparser dependency (#9981) 1 month ago
yarn.lock DEV: Remove htmlparser dependency (#9981) 1 month 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 2.6+, PostgreSQL 10+, Redis 4.0+. 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 - 2020 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.