Compare software

pwned vs Mozilla Monitor: catalog facts
pwned	Mozilla Monitor
Free Free and open source under the MIT license.	Free Data breach monitoring and alerts are free.
Command line	Web
Checks account breaches and exposed passwords from the terminal Supports JSON output for scripts and pipelines	Free breach scan by email address Ongoing alerts for new breaches
Some searches require a Have I Been Pwned API key Requires Node.js	Data broker removal service has been discontinued Only covers breaches that are publicly known
Downloadable app	Web application
Open source	Open source
License: MIT	License: MPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.