Compare software

UpdoUptimeRobot
Free

Free and open source under the MIT license.

 Freemium

Free plan with 50 monitors; paid plans add more features.

Windows, macOS, Linux, Command line Web
  • Provides website monitoring from the command line
  • Supports alerting and advanced settings
  • 50 monitors on the free plan
  • Wide range of check types, including ports and cron jobs
  • Requires command-line use
  • Hosted only
  • Some features such as multi-location checks may need a paid plan
Downloadable app Hosted service
Open source Closed source
License: MIT License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked October 8, 2026

Checked September 23, 2026

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