Is your CMS is not listed above? Your CMS is probably still supported in Gatsby Cloud! Gatsby has over 500 source plugins, all of which work in Gatsby Cloud. Because all of these plugins are not reviewed and vetted by Gatsby to meet our standards for being a first-class integration, performance and feature support may vary. To use Gatsby Cloud with an unlisted source plugin you’ll need to set up any necessary environment variables. If your data source supports webhooks, you’ll want to configure those to trigger Previews/Builds on data changes.
If you would like to help create a first-class integration for your data source of choice, checkout the first-class integration guide for more information.