Superinbox

Superinbox is sold on an enterprise pricing model, so expect to talk to the company rather than sign up for a self-serve plan.

The product is an AI email assistant that drafts replies in your own writing style and sorts your inbox into categories based on rules you set.

It works with Gmail and Outlook and runs inside your existing email client on web, desktop and mobile, so there is no separate app to learn.

Drafts draw on your email history and any documents you upload, and Superinbox adapts to your tone.

It also connects to your calendar to help with scheduling.

The company says busy professionals can save more than two hours a day, though that figure is its own claim.

Security is the main selling point for larger teams.

Superinbox is CASA Tier 2 certified, is a Google and Microsoft partner, and says it does not store email data after real-time processing.

For a company that wants an AI email writer without handing over mailbox archives, that policy matters.