ReplyRisk — for Gmail & Outlook

The invoice that costs you $137,000 looks just like the ones that don't

ReplyRisk reads the Gmail or Outlook conversation you have open and tells you when the person asking for money is not who you think — before you reply.

This email looks unsafe — do not reply

A sender address in this thread mimics another one: "vellumretai1.com" differs from "vellumretail.com" only by characters that look alike.

This message asks you to send money to new or changed payment details. Confirm by phone on a number you already have — never one from this email — before paying anything.

Why this is worth an extension

$3.04bnreported lost to business email compromise in 2025
$137,000average loss per incident
24,768complaints in one year

Source: FBI IC3 Annual Report, 2025. These attacks work because the email looks ordinary: a supplier you know, an invoice you expected, one changed line of bank details.

What it checks before you reply

When something looks wrong it says so, explains why, and refuses to draft a reply at all. It never tells you an email is safe — only what it found and what it did not.

And it still finds the deals going quiet

That is what it was built for, and it still does it. Open a thread and ReplyRisk tells you who owes the next move, which conversations are stalling, and why — then writes the follow-up in the tone you pick and drops it into the reply box.

Opportunity risk 81 — lost opportunity

A proposal was sent on 26 August and acknowledged the same day. Nineteen days have passed with no reply, and the promised team review never came back.

It does not read your mailbox

ReplyRisk analyses one conversation, when you press the button. No Google or Microsoft sign-in, no mail API, no mailbox access — only what is on screen. Your email is never stored: it is used to answer your request and discarded.

That matters more than it used to. Security researchers recently found AI browser extensions reading Gmail and sending it elsewhere, one-time passwords included.

Price

Free30 analyses a month
Pro$12 / month
Pro, annual$99 / year

Install it

Add to Microsoft Edge

Edge only for now. The listing opens in Edge; other browsers will show it as incompatible. Leave your email below and you will hear once — when it works in yours.