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DNSlytics vs DNS Spy: catalog facts
DNSlytics	DNS Spy
Freemium Free tools on the website; premium website access, monitoring and the API are paid monthly…	Freemium Monitoring is paid with a 7-day free trial; some one-off tools are free.
Web	Web
Reverse IP, name server and mail server lookups in one place More than ten years of historical DNS data	Record-level change alerts checked from multiple locations Domain and SSL expiry tracking in one place
Page views and features are limited without a premium plan IP and DNS data is refreshed every 14 days rather than live	Continuous monitoring requires a paid plan Hosted service only
Web application, Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
No account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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