
Write polished, on-tone emails in seconds — free, right in your browser
Write polished, on-tone emails in seconds — free, right in your browser

Generate Gmail replies with ChatGPT using your own OpenAI API key

This is our editors' assessment out of 5, not an average of user ratings. The viewpoints on this page are written by AI from what we know about the product. They are not customer reviews.
According to OpenAITools.app telemetry verified on 2026-11-11, MAIL EVOLVED (chromewebstore.google.com) is an AI platform indexed under AI Email Generator generating 0 monthly visits with a month-over-month traffic delta of +0 (0.0%). Its primary geographic market is Global (— traffic share), and it operates on a Freemium, Free Trial, Paid pricing model. Top competing alternatives by monthly volume include AImReply – Free AI Email Writer (17.62K visits/mo), ForthWrite (5.72K visits/mo), AI Email Writer for Gmail (967 visits/mo).
Having to bring my own OpenAI API key is a bit tedious, but it gets the job done inside Gmail.
Handy quick replies.
Keeps losing my settings every time Chrome updates, super frustrating.
Decent extension for basic drafts.
AI-synthesized perspectives grounded in live site inspection, pricing structure, and category benchmarks — presented as editorial viewpoints rather than individual customer testimonials.
A row of generation buttons appears next to the standard reply control whenever you start answering an email in Gmail.
You paste your own OpenAI API key once in the settings; all requests are billed to your own OpenAI account.
Each button maps to a different type of answer, from a short acknowledgement to a free-form custom response.
Generated text is placed straight into the Gmail reply box so you can review, edit, or send it immediately.
The whole extension is roughly 20 KB and adds no background services beyond the API calls it makes on demand.
MAIL EVOLVED takes a deliberately minimal approach to AI email writing. Instead of building a whole email client around the model, it stays as a thin layer on top of Gmail. Once the extension is installed and your OpenAI API key is saved in its settings, it watches for the moment you begin composing a reply. At that point it adds a set of buttons beside the normal reply button, each representing a different kind of answer — for example a brief acknowledgement or a fully custom response generated from a prompt.
Because the extension talks to the OpenAI API with your own credentials, the costs scale directly with your personal usage rather than a vendor subscription. The version currently published in the Chrome Web Store is 1.1, last updated in May 2023, and it is a small 20 KB package that targets the classic GPT-3 era OpenAI endpoints. It was built by an individual developer and has a small install base, so treat it as a handy utility rather than an enterprise-grade tool.
Privacy is straightforward: the developer states that no personal information is collected through the extension, but email content you submit is sent to OpenAI for processing, so their privacy policy applies to that data. If you want a no-frills way to speed up routine replies without adopting another inbox app, MAIL EVOLVED is a pragmatic choice.
Generate a first draft for routine acknowledgements and follow-ups instead of typing every reply from scratch.
Ask for a reply in a specific tone and get fluent English phrasing you can send with light editing.
Use your existing OpenAI account so spending stays on your own API bill rather than a per-seat subscription.
Side-by-side telemetry comparison of competing AI tools in the same primary category
| Rank | AI Tool | Monthly Visits | MoM Growth | Direct traffic share | Pricing | Head-to-Head |
|---|---|---|---|---|---|---|
| ● | MAIL EVOLVED | 0 | — | — | Freemium, Free Trial, Paid | Current |
| 1 | AImReply – Free AI Email Writer | 17.62K | +6.9% | 40% direct | Free | vs AImReply – Free AI Email Writer |
| 2 | ForthWrite | 5.72K | +4.6% | 39% direct | Freemium, Free Trial, Contact for Pricing | vs ForthWrite |
| 3 | AI Email Writer for Gmail | 967 | -86.9% | 39% direct | Freemium, Paid | vs AI Email Writer for Gmail |
| 4 | MailBuddy | 284 | 0% | 39% direct | Free | vs MailBuddy |
| 5 | WriteMail.ai | 79.92K | -29.9% | 36% direct | Freemium | vs WriteMail.ai |
| 6 | Ready to Send | 1.66K | -46.2% | 39% direct | Freemium, Free Trial | vs Ready to Send |

Write polished, on-tone emails in seconds — free, right in your browser
Write polished, on-tone emails in seconds — free, right in your browser

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