Compare software

nsupdate.info vs Dynu: catalog facts
nsupdate.info	Dynu
Free The hosted service is free and the project is open source.	Freemium Dynamic DNS is free; domains, email, SSL certificates and VPS hosting are paid.
Web	Web
Free dynamic DNS service Displays current public IP and reverse DNS	Free dynamic DNS tier Documented IP update protocol and API
Requires a network connection to update a hostname when its IP address changes.	Many services beyond basic DDNS are paid Requires creating an account
Web application, Self-hosted, Hosted service	Downloadable app, Hosted service
Open source	Closed source
License: BSD-3-Clause	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 October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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