Stello is a free, open-source desktop app for sending secure, interactive newsletters from your own computer.^1 It is a tool rather than a hosted mailing service: you send through your own email account, and Stello keeps contacts and drafts on your device instead of a central newsletter platform.^2 Recipients open a link in the browser — no account, extra app, or password — and a sent message can expire or be retracted.^3
The pages themselves go beyond plain email. Readers get a mobile-friendly layout with slideshows, video, comments, and reactions, while the writer stays with simple structured options and lets Stello handle the look.^4 Gracious Tech publishes the app at no cost, with no ads, no sign-up, and no tracking, under the MIT No Attribution license.^5 ^6 Hundreds of missionaries from dozens of agencies use it to stay in touch from sensitive contexts.^5 It runs on Windows, macOS, and Linux, including a Microsoft Store listing, and offers portable mode plus optional self-hosting for people who want their own storage.^7 ^8 ^9 ^10
