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UptimeRobot vs Updo: catalog facts
UptimeRobot	Updo
Freemium Free plan with 50 monitors; paid plans add more features.	Free Free and open source under the MIT license.
Web	Windows, macOS, Linux, Command line
50 monitors on the free plan Wide range of check types, including ports and cron jobs	Provides website monitoring from the command line Supports alerting and advanced settings
Hosted only Some features such as multi-location checks may need a paid plan	Requires command-line use
Hosted service	Downloadable app
Closed source	Open source
License not stated	License: MIT
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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