Too many emails? Letterly can help. It’s an AI tool for Gmail and Outlook. It writes and replies for you—fast. I tried it. Here’s what I found. 

Letterly Review AI Email Assistant (AppSumo Lifetime Deal)

How It Works – Letterly Review

Write Emails: Highlight a few notes → Click → Get a full email

Change Tone: Make it sound formal, friendly, short, or bold

Smart Replies: Suggests quick answers like “Yes, let’s meet” or “Sorry, I can’t”

Follow-Ups: Reminds contacts who don’t reply

Grammar Help: Works in 15+ languages like English, Spanish, and French

What’s Good

Saves Time: Cuts email work by 80%

Sounds Natural: No robotic writing

Easy to Start: Installs in 30 seconds

Private: It doesn’t store your emails

One-Time Buy: Around $49 on AppSumo—no monthly fee

What’s Not So Good

Only Works in Chrome: No mobile app

Basic Templates: You’ll need to make your own

Sometimes Too Simple: Can miss details in tricky replies

Great For

Founders who are always busy

Sales teams

Freelancers

People who write in English as a second language

Letterly Review

Final Thoughts – Letterly Review 

Letterly handles boring email tasks well. It’s not for deep or sensitive emails. But for daily replies, it’s fast, smart, and a steal at AppSumo’s price.