ForthWrite drafts replies in your voice inside Gmail, Outlook, and LinkedIn. Every edit becomes a training signal, so drafts get closer to how you write over time. Standouts: closed-loop voice matching, a visible improvement curve, ability to hit "Generate draft" in any thread, plus Pro auto-draft, batch, and Prompt Lab. BYOK on paid plans (9 providers). Free: 10 drafts/week, no card, no API key. 14-day Pro trial included.