Cotypist

Cotypist is a lightweight AI writing assistant built specifically for macOS that brings intelligent autocomplete to nearly every text field on your computer. By pressing Tab, users can accept inline suggestions that appear as they type in emails, documents, messaging apps, and other familiar Mac applications, removing the need to switch contexts or open a separate window. The tool is designed to keep the writing flow uninterrupted while reducing the repetitive effort of finishing sentences manually. A major focus of Cotypist is privacy and performance. All language processing runs locally on Apple Silicon hardware, so no text ever leaves the device. This local-only approach keeps latency low and ensures that sensitive content remains on the user's Mac. Writers working with confidential material benefit from the assurance that their drafts, messages, and notes are not transmitted to external servers for processing. Cotypist learns from each user's own writing over time, building a model of personal vocabulary, phrasing, and tone. The result is completions that feel natural rather than generic, helping the tool blend into existing workflows without sounding artificial. Word-by-word acceptance and inline typo corrections further refine the experience, while emoji suggestions add personality without cluttering the interface with pop-ups. For anyone who writes extensively on a Mac, Cotypist offers a streamlined alternative to cloud-based assistants. It combines the convenience of system-wide autocomplete with the confidence of fully local AI, making it well suited to professionals, students, and creatives who value both speed and privacy in their daily writing tasks.