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Duck DNS vs No-IP: catalog facts
Duck DNS	No-IP
Free Free to use; supported by donations through Patreon.	Freemium Free dynamic DNS hostnames; managed DNS, domains, SSL and Enhanced plans are paid.
Web	Web
No paid tiers Simple, documented update mechanism	Free hostnames on many shared domains Downloadable update client
Limited to the service's own subdomains Few features beyond basic dynamic DNS	Useful extras are in paid plans The site pushes upgrades and promotions
Hosted service	Downloadable app, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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.