MailTwin

MailTwin is a native macOS companion for Apple Mail built for people who handle many messages. Type a few rough reply points and it authors a complete, editable email in the learned voice for that sending account. Users choose among eight AI providers, including local options, and AI requests go directly from the Mac to the chosen provider. Every result stays reviewable before insertion. MailTwin also offers summaries, action items, translation, draft improvement, relationship memory, reusable actions, and a review-first Inbox Cleanup workspace. The full trial lasts 30 days, followed by a $19.90 one-time single license.