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Cybernews checker for seeing whether an email or phone appears in known data leaks.

Checker for seeing whether an email appears in the historical Ashley Madison breach dataset.

Checker for seeing whether a phone number or profile appears in Facebook-related breach data.

Exposure checker for seeing whether a password or email appears in known breach data.

Public breach-awareness service for checking whether an email address appears in known data breaches.

Mozilla service that checks email addresses against known breaches and explains protective steps.

Open-source platform used by organizations to run secure, privacy-preserving whistleblowing portals.

Tor Project documentation portal for onion-service applications, standards and operator tools.

Federated search portal querying science databases and repositories across many countries.