dark web monitoring
6 vendors in this category
1password Data Breach Scanner
https://1password.com/business/domain-breach-report/
Have I been Pwned
haveibeenpwned.com
Mandiant
https://cloud.google.com/security/products/digital-threat-monitoring?hl=en
Nordpass Data Breach Scanner
https://support.nordpass.com/hc/en-us/articles/360012509998-Data-Breach-Scanner
ProjectDiscovery
https://projectdiscovery.io/
Spycloud Dark Web Monitor
spycloud.com