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Nezha vs TrackSSL: catalog facts
Nezha	TrackSSL
Free Free and open source.	Freemium Free sign-up tier with paid plans for more monitoring.
Linux, Self-hosted	Web
Lightweight dashboard and agents SSL certificate expiry monitoring	Expiry alerts through email, Slack, SMS and Teams Notifies on certificate changes, useful for checking renewal automation
Needs a server to host the dashboard Much of the community documentation is in Chinese	Focused on certificates rather than general uptime Hosted service only
Self-hosted	Web application, Hosted service
Open source	Closed source
License not stated	License not stated
No account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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