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Checkly vs Site24x7: catalog facts
Checkly	Site24x7
Freemium Free to start, with paid plans for larger use.	Freemium Free and paid monitoring plans, with a 30-day free trial.
Web, Command line	Web
Monitors defined as code and kept in version control Uses standard Playwright for browser checks	Covers websites, servers, networks, applications and cloud in one service Alerts through several notification channels
Requires writing code, so less suited to non-developers Checks run on Checkly's hosted infrastructure	Hosted service only; monitoring data lives with the vendor Broad enterprise feature set can be more than a small site needs
Downloadable app, 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.