Lightbeam for Firefox - Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.
DeHashed - DeHashed is the largest & fastest data breach search engine.
AllAccounts - AllAccounts is an extension that allows Firefox to connect to websites using different user names.
LeakCheck - Data breach search engine, low price starting from $10/mo, one email address for free, unlimited API, 7B+ entries
Session Box - Using websites with multiple accounts at the same time is made easy.
Snusbase - The industry leading database lookup.