I'm interested in paying for a year subscription (Bronze). Is it possible to pay the year all at once, or do I have to sign up for a monthly $19 subs

Hi,

You can indeed pay for the full year.  If you click "Upgrade" on any of the plans in the pricing page:

http://www.jotform.com/pricing

You will then see the options for yearly and 2-year subscriptions:

If you have any further questions, let us know and we will be happy to help.