Templatical
Templatical is a drag-and-drop email editor you embed in a web app with one function call; it stores templates as JSON, renders output as MJML for cross-client compatibility, and works with React, Vue, Svelte, Angular or vanilla JS.
Templatical is a production email editor meant to be embedded directly in another application. Templates are stored as portable JSON and exported as MJML so they render correctly across email clients, and the editor itself, built with Vue internally, can be embedded in any frontend framework the same way. Comments, saved blocks, version history, test email sending and media handling are open source, with providers passed in at initialization; an optional paid Cloud tier adds AI rewrite, real-time collaboration and hosted storage.
The project also ships as an Agent Skill, installable with a single command, that lets a coding agent design a complete email from a prompt, preview and hand-edit it in the real editor, export send-ready MJML or HTML, or wire and configure the @templatical/editor SDK into an existing project.