Thanks. Honestly, I hadn't heard of Maily until your comment :) Just spent a few minutes with it. Looks like a clean React-first editor.

I can't directly compare it with Maily, but what I see from first glance is that it is a minimalist email template editor that gets the job done. Please correct me if I'm wrong.

Beefree and Unlayer are paid services that offer powerful features like custom blocks, merge tags, display conditions, theming. The catch is most of those features sit behind enterprise tiers, and you're tied to their cloud render API to get HTML out.

Templatical aims for that same feature set, open-sourced and self-hostable. No vendor render API — output is MJML, which is battle-tested across the major email clients.

Check out the playground — it has templates showcasing different features. See if it suits your use case.