Typeahead

Typeahead is a native macOS application that brings inline AI autocomplete to every app on your Mac, from email and Slack to editors and browsers. It runs entirely on-device using GPU-accelerated local AI models, so your text never leaves your computer — no cloud processing, no telemetry, no account required. Built for Apple Silicon and Intel Macs (macOS 14+), it suggests completions as you type and accepts them with a single tab press. Typeahead adapts to your writing style over a few days, learning your voice to produce suggestions that sound like you, not a generic bot. The tool is designed for anyone who types more than they'd like: email-heavy professionals, developers writing Slack messages and PR descriptions, writers who want to preserve their voice, and non-native speakers seeking fluency. Rather than fixing grammar or generating full drafts, Typeahead focuses on inline prediction, letting you finish sentences faster without switching context. It works in any app with a text input field, offline or on a plane, with zero lag. What sets Typeahead apart is its commitment to privacy and one-time pricing. While tools like Grammarly or Copilot require subscriptions and cloud processing, Typeahead costs $79 once, runs locally, and has no recurring fees. It competes with cloud-based autocomplete by emphasizing data ownership and offline functionality. The app is lightweight, feels native to macOS, and requires no setup beyond the initial purchase. Typeahead also positions itself against generation-first tools like Copilot and Notion AI, arguing that inline autocomplete is more useful for writing that revises or pivots mid-sentence — such as closing loops, saying no, or setting precedent. Its blog series contrasts its approach with onboarding copilots, favoring autocomplete for small, precise messages in implementation teams.