> Mandrill has a `render` endpoint which makes this easy. None of the others have this yet. Klaviyo provides similar functionality: https://www.klaviyo.com/doc

> Mandrill has a `render` endpoint which makes this easy. None of the others have this yet. Klaviyo provides similar functionality: https://www.klaviyo.com/docs/api/email-templates https://www.klaviyo.com/docs/api/email-templates Disclaimer: I work at Klaviyo.