Data breach directory

862 known data breaches, spanning two decades and billions of exposed accounts. Find a breach below to see what was leaked — or check your own email in seconds.

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Instead of guessing, check your email against known breach and dark-web databases for free — then we’ll help you remove exposed data and keep watching for new leaks.

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Browse all data breaches by year

Every verified breach we track, newest years first. Open any one to see what was exposed and what to do.

2007 · 1 breaches

Common questions

Data breaches, answered

How do I know if I’m in a data breach?

Enter your email address in our free breach and dark-web check. It compares your email against known breach databases and tells you which breaches include you, and what was exposed — in a few seconds, with no account needed.

What should I do if my email was in a data breach?

Change the password on the breached account and anywhere you reused it, turn on two-factor authentication, and watch for phishing that references the breach. If sensitive data like your phone or address leaked, remove it from data-broker sites and monitor for it resurfacing.

How many data breaches are there?

We track 862 known, verified data breaches spanning two decades and billions of exposed accounts. Browse the biggest below, search by year, or open any breach to see exactly what was leaked.