FastMailbox learns your tone and pre-drafts replies that sound like you.
Works with Gmail & Outlook
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One-click setup. Start organizing and drafting replies in minutes.
Link your Gmail or Outlook in two clicks to get started.
Smart categories set up automatically. Use our categories or create your own.
Emails needing a reply get a pre-written draft.
Draft Assistant
Drafted from your past replies and calendar context.
New Message
Thanks, this works for me. Sending the updated timeline and invite now.
Ready to send
When you check your inbox, every email needing a response will have a pre-drafted reply in your tone, ready for you to send.
Jenny Louve
Hey Jenny,
That sounds great. Here's some slots I have next week:
• Monday at 8:00AM
• Wednesday at 6:00PM
• Thursday at 8:00AM or 2:00 PM
✦ Finding slots via calendar integration...
Kindest,
Josh
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Everything you need to know about FastMailbox.
FastMailbox connects securely via OAuth to your Gmail or Outlook account. We never store your email content on our servers — all processing happens in real time.
Yes. FastMailbox learns your tone, phrasing, and style from your sent emails. The more you use it, the more natural the drafts become.
Absolutely. You can rename, merge, or create entirely new categories. FastMailbox adapts to how you work, not the other way around.
Security is our top priority. We use end-to-end encryption, SOC 2 compliance, and never sell or share your data. You can revoke access at any time.
Your inbox goes back to normal. We don't hold your data hostage — all AI drafts and categories are removed immediately upon cancellation.
Lite supports 1 account. Pro supports unlimited accounts across Gmail and Outlook, all managed from a single dashboard.
Stop drowning in email
FastMailbox organizes, categorizes, and drafts replies so you can focus on what actually matters.
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