Typeahead is a native macOS app that provides passive inline AI autocomplete across any text field, running three on-device models locally with no cloud round-trip, no account, and no subscription. At $79 one-time it supports both Apple Silicon and Intel Macs (macOS 14+) and includes writing style learning and per-app styles in Typeahead 2.0. Its main limits: macOS only (no Windows or Linux), no voice dictation, no active AI command layer, no meeting transcription, no free trial, and a fixed set of bundled models you cannot swap. If any of those are the constraint, here are the best alternatives - ranked with honest pros and cons.