The free plugin has everything you need to run a basic quote workflow. The Pro plugin adds more control, automation and PDF design. This page compares the two.
Plugin Free and Pro
Comparison
Feature
Free
Pro
Add to Quote button on single product, shop and category pages
Yes
Yes
Button placement: under or inline with Add to Cart
Yes
Yes
Hide prices and hide Add to Cart
Yes
Yes
Quote requests from guests and logged-in users
Yes
Yes
Request form with billing, shipping and message fields