Holehe
Checks whether an email is registered on 120+ sites via password-reset flows.
Holehe checks whether an email is attached to an account on sites like twitter, instagram, imgur and more than 120 others, retrieving information using the forgotten password function. It can be run from the CLI or embedded within existing Python applications. The README lists the GNU General Public License v3.0.
Dual-use tool. This tool can be used for research and investigation, and also to find, track or identify people without their consent. Listing it here is not an endorsement of either use.
Privacy note. Reveals which services your email is registered on — check your own exposure.
Official site: https://github.com/megadose/holehe
Source: https://github.com/megadose/holehe
Last verified 2026-10-12.
Description rewritten from the vendor's own pages and checked against them. How entries are checked.