MailGPT - ChatGPT and Claude for Gmail

Get the power of both ChatGPT and Claude AI models in your Email inbox

As of June 2026, MailGPT - ChatGPT and Claude for Gmail has 145 users and a 5.00/5 rating from 2 reviews in the Productivity category.

Usersup 83.5 percent+83.5%
145
145
Ratingno change0%
5.00
2 reviews
Reviewsno change0%
2
Version
1.0
Manifest V3

History

3 snapshots

Tracking since Apr 23, 2026.

150.2811273.72Apr 23, 2026Jun 7, 2026
View as table
DateUsersRatingReviewsVersion
Apr 23, 2026795.0021.0
May 12, 20261175.0021.0
Jun 7, 20261255.0021.0
Now1455.0021.0

Permissions & access

Permissions
storage
Host access
None declared

Screenshots

MailGPT - ChatGPT and Claude for Gmail screenshot 1MailGPT - ChatGPT and Claude for Gmail screenshot 2MailGPT - ChatGPT and Claude for Gmail screenshot 3MailGPT - ChatGPT and Claude for Gmail screenshot 4

About

Use both ChatGPT and Claude AI in your Gmail inbox, brought to you by Pier20.ai (https://pier20.ai/).

MailGPT brings professional-grade AI writing assistance directly to your inbox, helping you craft perfect emails in seconds.

**Features**
1. Transform rough outlines into polished, professional emails instantly 
2. Convert meeting notes into clear, actionable emails with one click
3. Add wit and personality to your messages effortlessly
4. Simplify complex emails to improve readability and response rates
5. Create custom writing styles with personalized AI instructions

Stop spending hours crafting emails - let MailGPT help you communicate more effectively and get faster responses.

Getting started is simple: Just install the extension, create a free Pier20 account, and start writing better emails immediately. No separate ChatGPT, OpenAI, Claude, or Anthropic accounts needed!

** FAQs**
Q: What are ChatGPT and Claude?
A: ChatGPT (by OpenAI) and Claude (by Anthropic) are advanced AI language models trained on vast amounts of human knowledge. They excel at understanding context, processing information, and generating human-like text for various purposes, including email writing.

Q: What is MailGPT?
A: MailGPT is a free Chrome extension by Pier20.ai that brings powerful AI writing assistance directly to your Gmail inbox. It helps you write more effective emails faster, leading to better response rates.

Q: Is MailGPT free?
A: Yes, the extension is completely free to use.

Q: Do I need an account?
A: You'll need a free Pier20.ai account to use the extension. Simply visit https://app.pier20.ai/ to get started.

Q: Is this an official OpenAI or Anthropic product?
A: No, MailGPT was developed by the Pier20.ai team. Originally built for internal use, we've made it publicly available to help everyone write better emails.

Technical

Version
1.0
Manifest
V3
Size
480KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
hmnjajhigjcfklcfabkjceimbeofamje
Developer ID
ue36cbcf7c4a6503e886f3a9bc3a8d327
Developer Email
[email protected]
Created
Dec 11, 2024
Last Updated (Store)
Dec 18, 2024
Last Scraped
Jun 7, 2026
Website
pier20.ai
Support URL

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Data sourced from the Chrome Web Store · last verified Jun 7, 2026.