ReferralCandy is an online marketing company that specializes in referral marketing. The company provides a plug-and-play platform that makes referral marketing easier. Techinasia.com notes that ReferralCandy modeled their structure after Dropbox’s two-sided incentive referral program. Dropbox’s program rewarded both the user that signed up through a referral link and the referrer with additional storage space. This tactic has proven successful for ReferralCandy who recently released their ReferralCandy API.