6,622 tools, each one opened, scored and signed by a Toolio reviewer

Mailbot Chrome Extension

Adds AI-drafted suggestions and buttons to Gmail via the OpenAI Assistants API.

Checked 4 Oct 2026 Reviewed by Alex Listed since October 2024

Screenshot of Mailbot Chrome Extension

At a glance

Starts at Free No paid plan found on the Chrome Web Store, September 2026.
Free tier Yes
Platforms Chrome, API
Best for Gmail users wanting AI email drafting
Not for People wanting a proven, widely reviewed tool

3.9 out of 5

Scored by Alex after real use

Our verdict

Mailbot connects Gmail to the OpenAI Assistants API, adding suggestion buttons that help draft replies directly inside your inbox. It's a fairly large install at over 12MB for what is essentially a drafting aid layered onto Gmail. It has no ratings yet and is listed in English only.

✓What it does well

In-Gmail suggestionsIt adds suggestion buttons directly inside Gmail's own compose window.
OpenAI-backed draftingIt connects to the OpenAI Assistants API to generate reply suggestions.
Simple Gmail connectionIt connects to your Gmail inbox without a separate app to manage.

✕Where it falls short

No reviews yetIt has no ratings so far, so there's no outside track record.
Large install sizeAt over 12MB, it's a fairly heavy extension, more than you'd expect for a tool that only adds a few Gmail buttons.
English onlyIt's listed in English only, with no other language shown.

Key features

AI suggestion buttonsIt adds buttons inside Gmail for AI-generated drafting suggestions.
OpenAI Assistants integrationIt connects Gmail to the OpenAI Assistants API for its AI features.
Inbox drafting aidIt helps compose emails directly within the Gmail interface.
Gmail-only integrationIt's built specifically to work with Gmail rather than other email clients.

Questions about Mailbot Chrome Extension

What does Mailbot Chrome Extension do?

Mailbot Chrome Extension connects Gmail to the OpenAI Assistants API and adds suggestion buttons inside Gmail's compose window that help draft replies. It is built specifically for Gmail rather than other email clients, and needs no separate app to manage.

Is Mailbot Chrome Extension free?

Mailbot Chrome Extension has a free tier, and Toolio found no paid plan on the Chrome Web Store in September 2026. It is listed with a Free plan at $0 and runs in Chrome, connecting through the OpenAI Assistants API.

How large is the Mailbot Chrome Extension install?

Mailbot Chrome Extension is over 12MB, which the reviewer calls a fairly heavy install for a tool that only adds a few Gmail buttons. The reviewer lists the large install size among its shortcomings.

Is Mailbot Chrome Extension well reviewed?

Mailbot Chrome Extension has no ratings yet, so there is no outside track record, and it is listed in English only. Toolio says it is not for people wanting a proven, widely reviewed tool.

How does Toolio rate Mailbot Chrome Extension?

Alex scored Mailbot Chrome Extension 3.9 out of 5 after real use, on 4 Oct 2026, and recommends it for Gmail users wanting AI email drafting. Toolio lists Mysterian AI for Gmail Chrome Extension, Compozee, Gmail GPT and Quickeee as alternatives.

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