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.
I believe that you are asking for email autoresponder - email that is sent to the person submitting the form.
To set it up, you should check out this guide: Creating a Form Autoresponder
Of course, if you have any questions along the way, do let us know and we would be happy to assist with the same.