ForthWrite is an AI email writing assistant for Gmail and Outlook that learns your writing style from your real sent mail. The more you use it, the more it sounds like you. Get smart drafts in seconds, auto-draft replies before you open your inbox, and maintain your personal voice at scale. Free to start, no credit card required.
How it works
ForthWrite captures your tone, sentence rhythm, and sign-offs from your actual sent emails, then uses that profile to generate drafts that match how you write, not a generic AI voice. Every draft you edit or send improves the model over time.
Key features
- Auto-draft: replies waiting in Gmail before you open your inbox
- Voice matching from your real sent mail, not templates
- Recipient-aware drafts that adapt to who you are emailing
- Prompt Lab for version-controlling and A/B testing your persona prompt
- BYOK support: bring your own API key for Claude, OpenAI, Grok, Mistral, and more
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