Rob Korobkin

This plugin enables shop administrators to create teams that buyers can associate their orders with in order to stage fundraising competitions.

WooCommerce Teams

This plugin enables shop administrators to create teams that buyers can associate their orders with in order to stage fundraising competitions.

raiserweb

This plug-in turns Contact Form 7 forms into competition entry forms. Simply set up a Contact Form 7 form, then assign the form to a competition using this plug-in. This plug-in will then:
Collect entries to competitions via the Contact Form 7 form, and let you view the entries in your WordPress admin panel. 
It also lets you export all entries to a CSV document 
Finally, have winners selected at random from your competitions, based on chosen date and filter criteria.
Note – this plugin only works in conjunction with Contact Form 7. If you do not have Contact Form 7, you will not be able to use it.

Competition Form

Run competitions on your site with this simple competition plugin, combined with Contact Form 7. Collect and save entries, pick random winners.

WooCommerce Teams vs Competition Form