What are some alternatives?
When comparing Dynu Dynamic DNS and nsupdate.info, you can also consider the following products
No-IP - Dynamic DNS and Managed DNS Provider
FreeDNS - Free DNS hosting, lets you fully manage your own domain. Dynamic DNS and Static DNS services available. You may also create hosts off other domains that we host upon the domain owners consent, we have several domains to choose from!
Duck DNS - Free dynamic DNS hosted on Amazon VPC
Dyn - Managed DNS, Outsourced DNS & Anycast DNS
ClouDNS.net - Free DNS, Cloud DNS, Managed DNS, GeoDNS and DDoS Protected DNS hosting with included web redirects, mail forwards and Round-Robin load balancing. Instant updates in Europe, North and South America, Asia and Australia.
DNS-O-Matic - DNS-O-Matic (dnsomatic.