Netlify. You can write a 1-page static site and deploy for free in one command with no setup. It's amazing. There are probably competitors and sure an S3/GCS

Netlify. You can write a 1-page static site and deploy for free in one command with no setup. It's amazing. There are probably competitors and sure an S3/GCS bucket is really not much harder, but this is truly effortless. You could use Typeform, Google Forms, or one of the CMS as an API services to take in form submissions without running a back end.