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Sherlock vs Holehe: catalog facts
Sherlock	Holehe
Best for: Finds accounts with a given username across hundreds of sites	Best for: Checks which services an email address is registered with
Free Free and open source under the MIT licence.	Free The open-source tool is available without a license fee.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Covers hundreds of sites from a single command Useful defensively for checking your own username exposure	Covers a long list of services from one command Useful for auditing where your own address is registered
False positives occur where sites return soft errors Profiling other people without cause raises obvious ethical and legal issues	Site behaviour changes often, so results drift out of date Querying other people's addresses raises ethical and legal questions
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Sherlock sherlockproject.xyz github.com/sherlock-project/sherlock Catalog checked September 22, 2026	Official website Full listing and sources Sources for Holehe github.com/megadose/holehe Catalog checked September 22, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.