Dark Web Monitoring
A service that scans dark-web forums, markets, and dumps for your personal information or credentials, alerting you when your data appears in criminal environments.
Also known as: dark web scan, dark web alert service
Last reviewed: 10 June 2026
Dark web monitoring services crawl hidden forums, paste sites, and criminal marketplaces — portions of the internet accessible via anonymising tools such as the Tor network — where stolen data is traded. When they find records matching your monitored data (email address, SSN, phone number, payment card numbers), they send an alert so you can take protective action before widespread fraud occurs.
Such services are offered by credit bureaux, cybersecurity companies, and increasingly bundled with bank accounts and identity-protection plans. They can meaningfully shorten the time between a breach and a victim's awareness of it, which correlates with reduced total financial loss. However, they are not exhaustive — not all criminal markets are indexed, private sales may not be detected, and data already widely distributed before monitoring began is not removed.
Consumers should treat dark-web alerts as early-warning signals requiring action, not as proof that fraud has already occurred. The appropriate response to an alert varies by data type: change a leaked password immediately; freeze credit if SSN or financial data is involved; monitor statements if a card number is found.