Countly plugins are not limited in any way in terms of what they can do. You can create a plugin from scratch that stores its own data and introduces new visualisations or you can simply pull data from an external service and display it in the Countly UI.
A Countly plugin can;
Get your plugins listed
You can take advantage of guidelines listed below to speed up your plugin development process. If you would like to explore some existing plugins you can check out Countly Community Edition plugins.
Submit Your Plugin
If you are ready to submit your plugin, please get in touch and we'll arrange an online meeting to go over the details.