What are some alternatives?
Ambassador - Referral Automation, Made Simple.
ShareThis - Grow your audience with easy-to-use sharing tools.
Girafi - Get more from your website visitors. Referrals, feedback, e-mails & more.
Shareaholic - Shareaholic is trusted by over 300000 brands, businesses, agencies, and individuals to grow website traffic and engagement 24 hours a day, 7 days a week.
Referral Candy - Run a fully automated, customizable and easy to integrate referral program
Taboola - Drive traffic to your site, blog or video, or monetize your site with the largest platform for content recommendation, audience acquisition, and native advertising.