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Monika vs Updo: catalog facts
Monika	Updo
Free Free and open source.	Free Free and open source under the MIT license.
Self-hosted, Command line	Windows, macOS, Linux, Command line
Configuration in a single YAML file Alerts on slow responses as well as downtime	Provides website monitoring from the command line Supports alerting and advanced settings
Command-line only, with no built-in dashboard You run and keep it online yourself	Requires command-line use
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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