I'm using Web Form Builder, very awesome cloud based Survey Form + Web Form service. Which I'm using in production with MailWizz at extremely cheap monthly cost of $10 with Unlimited Forms + Unlimited Submissions with Attachments
Why I'm using a external cloud based service? Is because @twisted1919 have lot of work on MailWizz to be completed before this external requirement could be embedded in MailWizz. Also, I feel if it will be a part of MailWizz then it will also be making impact over the MailWizz performance.
@Fabyc - That's an interesting idea, i don't think i am going to do soemthing like this thugh because this would take me away from mailwizz, which is something i don't want right now because i still have dozens things to do