What is LeakedSource?

LeakedSource is a breach intelligence platform that lets you check whether your personal data has been compromised in known data breaches. We index billions of records across tens of thousands of breach sources, making us one of the most comprehensive breach search engines available.

You can search by email address, username, phone number, IP address, or domain to discover your exposure. When your data appears in a breach, we show you which breach it came from, when it happened, and what types of data were exposed — so you know exactly which passwords to change and which accounts to protect.

Who is behind LeakedSource?

LeakedSource is powered by HEROIC, which operates one of the world's largest breach intelligence databases. HEROIC collects data from publicly disclosed breaches, security research, exposed databases, paste sites, underground forums, and stealer log repositories. HEROIC does not purchase stolen data, participate in hacking, or encourage any illegal activity — the purpose is strictly defensive.

Is it legal to use?

Yes. Checking whether your own data appears in known breaches is entirely legal and is recommended by security experts, government agencies, and organizations like NIST. Our Terms of Service prohibit using the service to access other people's data without authorization, for credential stuffing, harassment, or any illegal purpose.

How do I start?

Run a free scan on the homepage — no account required. You'll instantly see how many breaches your email appears in and which breach sources are affected. From there, you can create a free account to see more detail and set up continuous monitoring.