h8mail
Email OSINT and breach-hunting tool that pulls exposures for an address.
h8mail is an open-source command-line utility designed for email address reconnaissance. It aggregates publicly available data to identify potential data breaches and other online exposures associated with a specific email address. Security researchers and investigators use it to assess the digital footprint and risk profile of a target account.
Dual-use tool. This is capable of legitimate research (journalism, security, due diligence) and of harassment or stalking. Listing it here is not an endorsement of either use.
Privacy note. Reveals which breaches your email appears in — check your own exposure.
Official site: https://github.com/khast3x/h8mail
Source: https://github.com/khast3x/h8mail
Last verified 2026-08-31.