Have I Been Pwned

Checks whether an email or password appeared in known data breaches.

Have I Been Pwned lets you check whether an email address or password appears in known data breaches, and lets you subscribe to alerts. Run by Troy Hunt.

Why it's useful

Shows real breach exposure; useful for OSINT and awareness.

Category: Threat Intel & Detection
Pricing: Free search; paid API
Tags: breach, email, privacy, credentials
Link: haveibeenpwned.com