Social Snowball is the more common of the two in our index: it runs on 168 websites against 87 for Amazon Associates. Counts come from real scans, not vendor claims.
Amazon Associates is an affiliate marketing program that allows website owners and bloggers to create links and earn referral fees when customers click through and buy products from Amazon.
Social Snowball is an affiliate and referral marketing platform tailored for ecommerce brands.
Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.