Previously the best alternative was a free Firebase/Google account, and then setting up a HTML/CSS site, and deploying it.
This is much faster.
Thank you for building it!
And please, don't be dissuaded by the other commenters. Sure, the market is much smaller than the market that Squarespace et al are targeting, but you're solving your own problem, and there are at least a few others that share that same problem!
Problem this solves: People who want to quickly register a domain and get a text landing page up.
Side note: I wish Medium.com could set up a specific blog post as the home page for a publication with a custom domain
Or I wish I could get a custom domain for Quip.com notes