Static sites are a great option for simple websites nowadays, but the lack of form handling can be an annoying hurdle if the site needs to handle form submissions. Here are a few options for handling forms on a static site:
There are likely an abundance of similar SAAS products enticing people with free tiers and hoping their usage will bump them into paid tiers. If one needed to service a number of static sites and preferred to keep the form data and submission infrastructure in-house, it would not be out of the question to roll one's own custom solution.