Compare software

HetrixToolsWormly
Freemium

Free tier with 15 uptime and 32 blacklist monitors; paid plans add more.

 Paid

Paid service with a free trial that needs no email or credit card to start.

Web Web
  • Generous free tier for uptime and blacklist monitoring
  • Checks from up to 12 locations
  • Monitors HTTP and any TCP/IP service, including IPv6
  • Escalating alert rosters for teams
  • Hosted only, with no self-hosted option
  • Requires an account
  • Hosted service with an ongoing cost
  • More than a single small site usually needs
Web application, Hosted service Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Needs internet Needs internet

Checked September 23, 2026

Checked October 2, 2026

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