What are some alternatives?
When comparing Verified Domains and Undeveloped, you can also consider the following products
Agile Domain Search - Search great domain names for your website in seconds.
Nuage - Nuage provides domain naming services.
Startup name check - Startup Name Check is a free service allowing you to validate names for your next startup, side hustle or side-project. Works for numerous domains and social networks. All information is displayed in a clean table layout.
Short Domain Search - Find short, available single-word domain names
Nomino - Find a cool name for your product
DomainWatch - Domain Monitoring Made Easy