Have
I been
breached?
Check if your email address was exposed in a known data breach. Free, instant, and private. We never store your email.
Free. Instant. Private. Emails are never stored.
A breach today
is a scam
tomorrow.
Breached data gets sold, packaged into target lists, and used to personalize phishing attacks that are almost impossible to spot. Knowing you've been breached is step one. Stopping what comes next is step two.
Credential stuffing
Attackers try leaked passwords on every other site you use. One reused password can compromise your bank, email, and social accounts in minutes.
Targeted phishing
Leaked names, phone numbers, and addresses power highly personalized phishing that references real details. Gateway filters miss these entirely.
SIM swap & identity theft
Phone numbers from breaches enable SIM-swap attacks that take over your 2FA. Once an attacker owns your number, they own your accounts.
Breaches,
explained.
How do I check if my email has been breached?
Enter your email address in the form above. suss. instantly checks it against known breach intelligence databases. The lookup is free, instant, and private — we don't store your email address.
What should I do if my email was found in a breach?
Change your password on the affected service immediately, and on any other account using the same password. Enable two-factor authentication. Monitor your accounts for unauthorized activity. Consider using a password manager to generate unique passwords for every site you use.
Is the suss. data breach checker free?
Yes. It's free, unlimited, and requires no signup. We don't store your email address or share it with third parties. Your email is not retained after the lookup.
How often should I check my email for breaches?
Check once a month, or any time you hear about a major breach at a company you have an account with. Better yet, install the suss. browser extension — it scans every page you visit and warns you about phishing and scam attempts in real time.
How does suss. know about data breaches?
We combine public breach intelligence databases with our own threat research. Our feed is updated continuously so new breaches are reflected within hours of public disclosure. The breach checker is one surface; the same intelligence powers our browser extension, mobile app, and institutional API.
Stop finding out
after the fact.
suss. is ambient trust infrastructure — it scans every page, email, and chat in real time, before you act on them. Install the free browser extension in under 30 seconds.
Works on Chrome, Edge, and Brave. No credit card required.