Is this real?Ask before you click.
Cluttersignal checks the email, text, link, or site in front of you — then tells you what it found and the one thing to do next.
Available forChromeEdgeFirefox
Checks start on your device · 7-day free trial, then $4.99/month · Privacy Policy and Terms of Use
- Maya ChenLunch Thursday? — The Thai place on 5th around 12:30?
- Microsoft 365Your password expires today — Sign in to keep your current password
- Northwind BankYour October statement is ready — View it any time in online banking
- Acme SuppliesUpdated bank details for invoice #4471 — Please send today’s payment to our new account
- Dan OrtizQuick favor? — Are you at your desk? I need something handled
Try it here
Paste something suspicious. See what we see.
This is the check the extension runs on your device, running right here in your browser. Nothing you type is sent anywhere.
Pick a sample or paste your own, then press Check it.
Everywhere you read
One extension. Every place a scam can reach you.
The site you’re on, the email you open, the text you were sent, the link in a DM — each one is a click from a straight answer.
A quiet badge on every site
Worked out on your device as you browse — nothing about the pages you visit is sent to us. On a clean site it shows briefly and fades. On a look-alike, it stays and tells you why.
One click on any message
Check the email you’re reading right from your browser. In supported webmail, every message gets its own Check button, and the result stays on it.
Paste a text
Got a text from your “bank”? Paste it into the side panel and get a straight answer.
Links, before you click
Look-alike addresses are caught on your device. Private tokens are stripped before a link is checked online.
Never just “safe”
Every result is one of four verdicts, with the reasons — and what the check couldn’t see.
QR codes, read before you scan
Scammers hide the link in a QR code so filters can’t read it. Cluttersignal reads it on your device and tells you where it really leads.
A near-copy of someone you know
Cluttersignal remembers the domains of senders you’ve checked, only on your device, and flags the copy that asks you to pay.
See what left your device
Settings lists every request the extension made and what kind of data it carried. Never the content itself.
Workspace · private beta
Your whole inbox, checked for you.
Workspace brings Gmail and Outlook into one inbox, flags the risky message before you open it, and drafts replies that wait for your OK. It’s in a private beta while we get it right.
How it decides
Six questions, every time.
How many we can answer depends on what you give us — a pasted text says less than an open email — and every result tells you which ones we couldn’t.
Identity
Is this really who it claims to be?
We read your mail app’s own verified-sender badge and warning banners, and spot look-alikes of brands you know — a swapped letter, a near-miss spelling.
Relationship
Does this match your history?
A first-time sender reads differently than someone you hear from every week. Cluttersignal remembers the domains of senders you’ve checked, only on your device, so a near-copy like acrne.com for acme.com stands out.
Threats
Phishing, malware, or scam signals?
Scam wording, where each link really goes, QR codes hidden in images, links on live blocklists (with cloud analysis on), and attachment names that look like programs or macros.
Context
Does this request make sense?
Is it asking for a password, a payment, or a one-time code? With cloud analysis on: was the domain registered last week?
Privacy
What could this expose?
Pages asking for credentials or payment, and known tracking scripts — the data collection worth a second look.
Decision
What should you do next?
All of the above becomes one clear next step, so you’re not left interpreting a score — and if you already clicked or paid, what to do now.
Why it matters
Scams take more every year.
The messages are harder to tell from the real thing, and the losses keep climbing. The cheapest moment to catch one is before you click, reply, or pay.
Reported to the FTC in 2025
$15.9 billion
What people told the FTC they lost to fraud — up from $12.5 billion the year before. And those are only the losses that got reported.
Reported to the FBI in 2025
$20.9 billion
Lost to internet crime, up 26% in a single year — the most ever recorded.
A typical loss
$497
The median amount lost when someone reported losing money to fraud in 2024 (the FTC’s latest full data book).
One typical scam costs almost 10 years of Signal Pro.Signal Pro is $49.99 a year. A single median loss of $497 would pay for almost 10 years of it — and many losses are far bigger than the median.
Add to ChromeWhat’s new
Recently shipped.
- 1.7.1Catches more scams on your device. Fake sign-in pages behind a shared form or document, and “pay a fee to release your funding” offers. In review at the Chrome, Edge and Firefox stores.
- 1.7.0QR codes, look-alike senders, and a log of what left your device. In review at the Chrome, Edge and Firefox stores; it reaches you as each one approves it.
- StoresNow on Edge and Firefox. Install from Edge Add-ons or Firefox Add-ons, alongside the Chrome Web Store.
- 1.6.1Sharper on-device check. Fewer false alarms on genuine invoices and e-signature emails.
- 1.6.0Cloud analysis from install. The written report and Trust Score are on by default; one switch turns them off.
- 1.4.0Site badge and look-alike detection. A brief badge on every page, and a warning when a site imitates one you know.
Is this real?Find out in one click.
A second opinion on the email you’re reading, the link you were sent, or the page you’re on — with the reasons spelled out. 7-day free trial, then $4.99/month or $49.99/year.
Available forChromeEdgeFirefox
Best-effort screening, not a guarantee. Always verify unusual payment or password requests through a channel you already trust.