Mailbot Chrome Extension
Adds AI-drafted suggestions and buttons to Gmail via the OpenAI Assistants API.
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 a Toolio reviewer after real useOur 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.