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Dynu vs FreeDNS: catalog facts
Dynu	FreeDNS
Freemium Dynamic DNS is free; domains, email, SSL certificates and VPS hosting are paid.	Freemium Free DNS and subdomain hosting, with premium options available.
Web	Web
Free dynamic DNS tier Documented IP update protocol and API	Large choice of shared domains for subdomains Dynamic updates with a single curl call
Many services beyond basic DDNS are paid Requires creating an account	Dated, text-heavy web interface Some features reserved for premium users
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.