Are data confidential on jot form or can anyone look at form?

Anyone with the link can view the form, but not the data, the submissions data is only accessible if you're logged into your JotForm account. 

Now, if you want the submissions data can be shared, here is a guide that will help you doing so: https://www.jotform.com/help/199-How-to-Share-Form-s-Submissions-Page