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Cloudflare DDNS vs Dynu: catalog facts
Cloudflare DDNS	Dynu
Free The open-source tool is available without a license fee.	Freemium Dynamic DNS is free; domains, email, SSL certificates and VPS hosting are paid.
Linux, Self-hosted, Command line	Web
Handles IPv6 as well as IPv4 records Tiny container with one configuration file	Free dynamic DNS tier Documented IP update protocol and API
Cloudflare-specific; it does not work with other DNS providers Requires an API token with DNS edit permission	Many services beyond basic DDNS are paid Requires creating an account
Self-hosted	Downloadable app, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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