Reply to Every Email

Without Writing One

FastMailbox learns your tone and pre-drafts replies that sound like you.

Works with Gmail & Outlook
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FastMailbox user AL MK RP JT

Join 20,000+ people who stopped dreading their inbox

Get started in minutes

One-click setup. Start organizing and drafting replies in minutes.

STEP 1

Connect your Google or Microsoft email

Link your Gmail or Outlook in two clicks to get started.

STEP 2

Organizes your inbox exactly how you want it

Smart categories set up automatically. Use our categories or create your own.

Newsletter To Reply Marketing Calendar Newsletter To Reply Marketing
Notification Cold Email Team Urgent Notification Cold Email Team
STEP 3

Pre-drafted replies based on your email history and calendar

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

Pre-written drafts waiting in your inbox

When you check your inbox, every email needing a response will have a pre-drafted reply in your tone, ready for you to send.

To
Jenny Louve profile

Jenny Louve

AI drafting response...

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

An organized inbox, automatically

Stop spending hours sorting through hundreds of emails. We automatically categorize and organize your emails so you can focus on what matters.

Before99+
U
Update on Project Chimera
Oct 1
Project Chimera update
Check out the latest progress on Project C...
T
All Hands Meeting
Sep 21
Important updates from leadership
Team, Join us for the All Hands meeting...
J
Job Opportunity
Sep 19
Seeking Senior Engineer at your company
Dear Hiring Manager, I am writing to express m...
N
Workplace Productivity Tips
Sep 12
Boosting efficiency in remote work
In this newsletter, we explore effective strat...
L
LinkedIn: New Connection Request
Sep 9
Senior Software Engineer at Octa Corp
I'd like to connect and learn more about...
T
Tech Today Newsletter
Sep 8
The latest in consumer tech
Top stories: AI advancements, gadget revie...
F
Freelance Project
Nov 12
Available for freelance graphic design work
Hi there, I would like to offer my services fo...
jane-doe-freelance-portfolio.pdf
After
To Reply
U
Strategy Discussion
10:00 AM
Q4 Planning
Check out the latest progress on Project C...
U
Update on Project Chimera
Oct 1
Project Chimera update
Check out the latest progress on Project C...
T
All Hands Meeting
Sep 21
Important updates from leadership
Team, Join us for the All Hands meeting...
Newsletter
M
Update on Project Chimera
Oct 1
Project Chimera update
Check out the latest progress on Project C...
T
Tech Today Newsletter
Sep 8
The latest in consumer tech
Top stories: AI advancements, gadget revie...
N
Workplace Productivity Tips
Sep 12
Boosting efficiency in remote work
In this newsletter, we explore effective strat...
Recruitment
J
Internship Opportunity
Sep 19
Seeking Senior Engineer at your company
Dear Hiring Manager, I am writing to express m...
J
Job Opportunity
Sep 19
Seeking Senior Engineer at your company
Dear Hiring Manager, I am writing to express m...
F
Freelance Project
Nov 12
Available for freelance graphic design work
Hi there, I would like to offer my services fo...
jane-doe-freelance-portfolio.pdf

Clean up your inbox in seconds

Easily identify and unsubscribe from newsletters and promotional emails you no longer read with a single click. No more hunting for tiny unsubscribe links.

TV
Trading Viewupdates@tradingview.com
P
Product Huntnews@producthunt.com
D
Deliveroomarketing@deliveroo.com
M
Medium Daily Digestnoreply@medium.com
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Simple, transparent pricing

Everything you need in one plan.

Pro

Save 16%

For individuals, entrepreneurs, and executives looking to buy back their time.

$24 /user /month (billed annually)
Try free for 3 days
  • Sorts and labels every email
  • Drafts replies in your voice
  • Blocks cold emails
  • Bulk unsubscribe and archive emails
  • Email analytics
  • Unlimited knowledge base
  • Team-wide analytics
  • Priority support

Frequently asked questions

Everything you need to know about FastMailbox.

How does FastMailbox read my emails?

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.

Will the AI drafts sound like me?

Yes. FastMailbox learns your tone, phrasing, and style from your sent emails. The more you use it, the more natural the drafts become.

Can I customize the inbox categories?

Absolutely. You can rename, merge, or create entirely new categories. FastMailbox adapts to how you work, not the other way around.

Is my data safe?

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.

What happens if I cancel?

Your inbox goes back to normal. We don't hold your data hostage — all AI drafts and categories are removed immediately upon cancellation.

Does it work with multiple email accounts?

Lite supports 1 account. Pro supports unlimited accounts across Gmail and Outlook, all managed from a single dashboard.

Stop drowning in email

Inbox zero,
every single day

FastMailbox organizes, categorizes, and drafts replies so you can focus on what actually matters.

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