CIDER currently has several official & unofficial support channels. For questions, suggestions and support refer to one of them.

Please, don’t use the support channels to report issues, as this makes them harder to track.

The various support channels are listed below in the order of their importance from the perspective of the maintainers.

GitHub Discussions

These days our primary discussion board is here.

It’s a great place to share ideas, help other CIDER users and just be up-to-date with interesting developments.


CIDER has its own Discord chat server, created by CIDER’s author Bozhidar. You can join the Discord server here.

As of 2021, Discord is Bozhidar’s preferred chat for CIDER.


We’ve got an official Clojurians Slack - #cider. The channel is very active and is a great way to get a handle on some of the maintainers and interact with other CIDER users. If you need an invite you can go here.

There’s also another channel named #emacs for generic Emacs discussions.

Bozhidar Slack handle is bozhidar, instead of bbatsov.


We’re also encouraging users to ask CIDER-related questions on StackOverflow.

When doing so you should use the cider tag (ideally combined with the tags emacs and clojure).

Mailing list

The official mailing list is hosted at Google Groups. It’s a low-traffic list, so don’t be too hesitant to subscribe.


We’ve got an unofficial Freenode channel - #clojure-emacs. It’s not actively monitored by the CIDER maintainers themselves, but still you can get support from other CIDER users there.