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updown.io vs Cronitor: catalog facts
updown.io	Cronitor
Paid Pay-per-use pricing that scales linearly with check frequency; cards, PayPal, SEPA and…	Freemium Free to start, with paid plans for more monitoring.
Web	Web
Check interval adjustable from 15 seconds to 1 hour Downtime confirmed from two locations before alerting	Catches cron jobs that fail, run late or never start Keeps output and metrics from every run
No free tier mentioned Hosted only, with no self-hosted option	Hosted service that requires an account Jobs need an SDK, API call or wrapper to report in
Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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