Have I Been Pwned
haveibeenpwned.comCheck if your email address has been exposed in a data breach
Securitydata-breachemail-securitypassword-securityprivacyapibreach-notificationk-anonymity

About
Have I Been Pwned (HIBP) is a free service that lets individuals check whether their email address or password has appeared in known data breaches. It also offers breach notification alerts and a RESTful API for developers and organizations to programmatically query breach data. Organizations can verify domain ownership and retrieve all breached email addresses associated with their domain.
Problem
People and organizations have no easy way to know if their email addresses or passwords have been compromised in data breaches.
For
Individuals concerned about their online security, developers, and organizations wanting to monitor breach exposure
How it works
Users enter their email address on the site or query the API, which checks it against a database of hundreds of known data breaches and returns any matches.
Business model
freemium
Status
launched