The application is built on Electron. I think that visual editors like Mail Studio are one of the cases where this choice makes sense, since you are editing a live HTML page. You would need some a webview regardless of platform, but Electron makes the implementation easier.
At the moment, we support ESP syncing, which create/update a template on the linked platform. You can then use it as the basis of a campaign.
At the moment, we support ESP syncing, which create/update a template on the linked platform. You can then use it as the basis of a campaign.