SpellType

Most AI writing tools ask you to change your habits: open a separate chat window, write a prompt, copy the answer back, then rewrite it in your own voice. SpellType takes the opposite approach. It sits inside the applications where writing already happens and offers short, inline completions that you accept with Tab or ignore by continuing to type. There are no model menus, no prompt boxes and no per-app configuration.

Its main differentiator is what it deliberately does not do. SpellType does not request macOS Screen Recording permission, does not take screenshots and does not build a profile of your writing. Suggestions are generated by a small local model on your Mac and never sent to SpellType's servers, which the vendor states means it works offline and keeps sensitive work private. Optional product analytics — limited to counts of active use and suggestions shown or accepted — can be turned off. Because completions finish your thought rather than writing a whole message for you, the output tends to still sound like you.

Setup is a single macOS permission: SpellType uses Accessibility access to offer completions in supported apps, and skips places where autocomplete would not help. It requires macOS 14 Sonoma or later on an Apple silicon Mac, with 16 GB of unified memory recommended, and is designed to stay light on battery so it can be left running. The standard app is free and unlimited for both personal and company use, while bespoke work such as custom models, integrations or deployment is scoped separately under SpellType for Business.