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updown.io vs Uptime.com: catalog facts
updown.io	Uptime.com
Paid Pay-per-use pricing that scales linearly with check frequency; cards, PayPal, SEPA and…	Paid Commercial monitoring service with paid plans.
Web	Android, iOS, Web
Check interval adjustable from 15 seconds to 1 hour Downtime confirmed from two locations before alerting	Website, API, cron job and real user monitoring in one service Unlimited email, SMS and Slack notifications
No free tier mentioned Hosted only, with no self-hosted option	Hosted only, with no self-hosted option Aimed at business monitoring rather than personal sites
Hosted service	Downloadable app, 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.