JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
It is possible to limit the number of people who can register to your form. Go to the Preferences and then set the Status to "Disable on submission limit" and then specify the number of allowed submissions.
Please check the complete guide here: How-to-limit-submissions-in-a-form
Hope that helps. Thank you.