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 would like to apologize for we don't have a plan that has exactly 500 allowable submission per month. The plan that has the lowest submission is the Free plan which has 100 submissions per month and next to that is the Bronze plan which already has 1000 submissions per month.
You may want to check our pricing guide for reference. https://www.jotform.com/pricing