Cotypist

Cotypist puts an AI autocomplete layer across every text field on macOS — not just inside a specific editor or browser tab, but system-wide. The 'in your voice' angle means it learns from your writing patterns rather than applying a generic completion style, which is the real differentiator over tab-to-complete features baked into individual apps. Running locally matters here: no text you type leaves the machine, which removes the usual hesitation about feeding a cloud model your drafts, notes, and internal documents. The practical use case is anyone who writes constantly across many different contexts — Slack, email clients, editors, terminals — and finds switching between autocomplete behaviors per-app exhausting. Reservation: the quality ceiling of local models is still meaningfully below cloud alternatives, so if raw suggestion quality is the priority over privacy, that trade-off is real. Also worth checking whether it conflicts with existing system-level keyboard tools. -> Best for: solo founder or indie hacker who writes heavily across many Mac apps and has a privacy reason to keep completions local.