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April 9, 2026

MailGPT

ChatGPT for Gmail

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ChatGPT and Claude AI in your Gmail inbox.

Email Chrome Extension Gmail AI Writing Tool Advanced Language Models Automatic Email GenerationFree

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Overview

MailGPT - ChatGPT and Claude for Gmail is a Chrome extension that brings AI-based writing abilities into your Gmail inbox with the combined power of ChatGPT and Claude AI models.

Developed by Pier20.ai, this extension helps users to create efficient, professional-grade correspondence, transforming rough outlines into polished and clear emails.

The tool also has features for turning meeting notes into action-oriented emails, adding personality to messages, simplifying complex writing for better readability, and enhancing response rates.

It also enables users to craft custom writing styles informed by personalized AI instructions. Developed with a simple setup process, users need to install the extension and create a Pier20 account.

It aligns with the technology of ChatGPT by OpenAI and Claude by Anthropic, both advanced AI language models refined to understand context, process information, and generate human-like text.

It doesn't necessitate separate accounts with ChatGPT, OpenAI, Claude, or Anthropic. MailGPT does not collect or use user data and complies with EU laws.

Notably, this product is not an official OpenAI or Anthropic tool, but developed by Pier20.ai team for enhancing email writing skills of users.

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June 21, 2025

Initial release of MailGPT.

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ChatGPT for Gmail MailGPT

ChatGPT for Gmail

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Pros and Cons

Pros

Chrome extension

Professional-grade correspondence

Transforms rough outlines to emails

Turns meeting notes to emails

Adds personality to messages

Simplifies complex writing

Enhances response rates

Custom writing styles

Simple setup process

No separate ChatGPT account needed

No separate Claude account needed

No separate Anthropic account needed

Doesn't collect user data

Compliance with EU laws

Good publisher record

Ability to add wit

1-click meeting notes conversion

Free to use

Includes Q&A section

Extension size is 480KiB

High rating on Chrome store

Supports English language

Made by Pier20.ai

Doesn't sell data to third parties

Supports text simplification

Enhances email communication

Increases productivity

Doesn't use data for creditworthiness

Doesn't use data for lending purposes

Promotes user privacy

Developer committed to EU compliance

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Cons

Only available on Chrome

Requires Pier20 account

Exclusive to Gmail

Doesn't integrate other email platforms

Dependent on developer updates

No multi-language support mentioned

No evident offline capabilities

Unavailable on mobile devices

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IOS

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Caitlyn Phillips

Q&A

What is the function of MailGPT in Gmail?

MailGPT functions in Gmail by offering professional-grade AI-based writing assistance. It helps in crafting efficient and professional emails from rough outlines, transforming meeting notes into action-oriented emails and enhancing the readability of complex writing.

How does MailGPT - ChatGPT and Claude for Gmail enhance my emails?

MailGPT boosts your emails by simulating human-like text patterns to transform rough outlines into polished and clear professional-grade correspondence. Additionally, it adds personality to your messages, optimizes your writing for better readability, and employs AI-informed styles to enhance responses.

What specific features does the MailGPT Chrome extension offer?

The MailGPT Chrome extension offers features such as transforming rough drafts into professional emails, converting meeting notes into clear, action-oriented emails, adding personality to messages, simplifying complex writings, creating custom writing styles informed by personalized AI instructions, and improving response rates.

Can I create custom writing styles with MailGPT?

Yes, MailGPT allows the creation of custom writing styles informed by personalized AI instructions.

What AI models are used in MailGPT and what are their roles?

MailGPT uses the ChatGPT by OpenAI and Claude AI by Anthropic models. These advanced AI language models understand context, process information, and emulate human-like text production.

How does the MailGPT tool simplify complex writing?

MailGPT simplifies complex writing by unpacking the dense information into simpler terms to improve readability and enhance response rates.

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How is MailGPT incorporated into my Gmail?

MailGPT is incorporated into Gmail via a Chrome extension. Through a simple setup process of installing the extension and creating a Pier20 account, MailGPT is directly integrated into the Gmail interface for seamless user experience.

Can MailGPT turn my meeting notes into emails?

Yes, MailGPT can turn meeting notes into clear, action-oriented emails.

Is the setup process for MailGPT difficult?

No, the setup process for MailGPT is noted as simple. Users are only required to install the Chrome extension and create an Pier20 account.

Do I need to create a separate account with OpenAI, Claude, Anthropic, or ChatGPT to use MailGPT?

No, it is not necessary to create separate accounts with OpenAI, Claude, Anthropic, or ChatGPT to use MailGPT.

Does MailGPT collect or use my personal data?

No, MailGPT does not collect or utilize any user data.

In what way does MailGPT adhere to EU privacy laws?

MailGPT adheres to EU privacy laws by not collecting or using user data and ensuring all user data is managed in compliance with core EU laws and regulations.

Who developed MailGPT, and does it have any affiliations with OpenAI or Anthropic?

MailGPT was developed by the team at Pier20.ai. It has no official affiliations with OpenAI or Anthropic but leverages the technology of ChatGPT by OpenAI and Claude by Anthropic for its functionality.

How can MailGPT help me with professional-grade correspondence?

MailGPT aids with professional-grade correspondence by leveraging AI to transform rough outlines of your thought process into clear and concise emails with human-like professional tone.

Does the AI in MailGPT understand context?

Yes, the AI in MailGPT, deriving from the advanced capabilities of ChatGPT and Claude AI, understands context to process information and generate human-like text.

How does MailGPT improve response rates?

MailGPT improves response rates by simplifying complex writing to enhance readability and employing AI-informed custom styles tailored to each user, thereby increasing the likelihood of engagement.

Does the use of MailGPT require a Pier20 account?

Yes, using MailGPT does require creating a Pier20 account.

What requirements are there for installing the MailGPT extension?

The requirements for installing the MailGPT extension involve having access to the Google Chrome web browser to install the extension, and creating a Pier20 account.

How does MailGPT add personality to my messages?

MailGPT can add personality to your messages by adding a unique twist of wit and charm, making the tone of your emails more engaging and less robotic.

Can I use MailGPT to improve my email writing skills and productivity?

Yes, by transforming rough outlines into polished emails, enhancing the readability of complex writing, and turning meeting notes into action-oriented emails, MailGPT serves as a tool for enhancing your email writing skills and productivity.

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