drupal web form or Wordpress web form

This is a business registration form.
I have the main site on drupal 7. Also i have a subdomain site on wordpress.

I don't mind if this form will created on drupal or on wordpress. It is up to you.

i want to design and create a web form with two steps.

After creation of web form i want to input the registration data on three sites:
1) on my drupal 7 site (database)
2) on my Yetiforce crm (like vtiger) on module Leads
3) MailChimp

Οι οδηγίες κατασκευής υπάρχουν μόνο στην ελληνική γλώσσα.