Cotypist

What it does

Cotypist is a Mac-native AI autocomplete tool that predicts your next words as you type, across virtually any application. It runs entirely on your Apple Silicon Mac, processing everything locally with no cloud dependency. Suggestions appear inline in real time: press Tab to accept the next word or the full phrase, or keep typing and the suggestion adapts within a letter or two. The model learns your vocabulary, phrasing, and style over time, aiming to sound like you rather than a generic AI.

Who it is for

Cotypist targets anyone who writes extensively on a Mac: professionals handling email, Slack, and documentation; marketers writing copy; customer support agents replying to tickets; and even AI prompt engineers. It also explicitly serves users for whom typing is challenging—non-native English speakers, dyslexic writers, people with hand arthritis, one-handed typists, and Neuralink implant wearers. The tool is designed to augment rather than replace writing, making it suitable for those who want to keep their voice while typing faster.

Why it matters

Traditional AI writing tools require context-switching: you stop typing, open a chatbot, craft a prompt, wait for a response, edit the output, and paste it back. Cotypist eliminates this detour by integrating suggestions directly into the flow of typing. It claims to reduce typing by up to 50% while preserving the user's unique style. Because all processing is local, it offers strong privacy guarantees—no data leaves the device—and works offline. For users who type all day, the cumulative time savings can be significant, and the reduced keystroke count may help prevent repetitive strain injuries.

Launch signal

Cotypist has received positive reviews from notable tech commentators. John Gruber of Daring Fireball called it "very well-designed, remarkably Mac-assed" and noted that its suggestions are "eerily good." Quinn Nelson of Snazzy Labs published a YouTube review calling it "bloody fantastic." The app also has a presence on Hacker News and Reddit with user testimonials. The website offers a free tier (100 completed words per day) and a 30-day Pro trial with no credit card required, lowering the barrier to adoption.

Brand and naming

The name "Cotypist" blends "co-" (collaborative) with "typist," suggesting a typing partner that works alongside you. It is short, memorable, and the .app domain reinforces its Mac-native identity. The tagline "Local AI Autocomplete in your voice, anywhere on your Mac" clearly communicates the core value proposition: local processing, personalization, and broad app compatibility. The brand positions itself as an augmentation tool rather than a replacement, emphasizing speed and privacy as key differentiators from cloud-based alternatives.