Where does LeakedSource breach data come from?

Trusting a breach search engine means knowing where its data comes from.

The source: HEROIC

Our breach data comes from HEROIC, LeakedSource's parent company, which operates one of the world's largest breach intelligence databases — billions of records spanning tens of thousands of breach sources, from the early 2000s to the present.

Where the data is collected

HEROIC's researchers collect data from publicly disclosed breaches, security research, exposed and misconfigured databases, paste sites, underground forums, and stealer log repositories. Collected data is processed, deduplicated, and indexed so that individuals and organizations can search their own exposure.

What's in the index

• Traditional database breaches — compromised organizations (LinkedIn, Adobe, National Public Data, and thousands more)
• Data scraping incidents — public-facing APIs exploited to collect user data at scale
• Stealer log collections — credentials harvested by infostealer malware from infected devices
• Combolists and credential dumps — aggregated stolen data from multiple sources
• Cloud misconfigurations — databases inadvertently left exposed on the internet

You can browse every indexed source in our Breach Database.

The ethical lines

HEROIC does not purchase stolen data, participate in hacking, or encourage any illegal activity. The purpose of collection is strictly defensive: helping victims discover and respond to their exposure. On the LeakedSource side, sensitive fields are masked by default and detailed records require an authenticated, verified account — the same data that warns a victim is deliberately made useless to an attacker.

How current is it?

The index is updated continuously, and LeakedSource syncs new breach sources automatically every 6 hours. With monitoring enabled, you're alerted as soon as your data appears in anything new.