You can develop add-ons with Apps Script or your preferred hosting infrastructure, development tool chain, source control system, coding language, and code libraries.
Anyone can use Apps Script to create powerful extensions in a web-based, low-code environment.
As an alternative to Apps Script, you can build an add-on in any coding language you want, as long as you can return properly formatted JSON for the interface to render as cards.
Get help, file a bug, or request a feature.
Want to see Google Workspace Add-ons in action?
The Google Workspace Developers channel offers videos about tips, tricks, and the latest features.