Referral programs work for a narrow set of products with specific buyer behavior.
Referral programs get invoked as a growth lever more often than they actually work. They compound in a narrow set of products; in others they produce spam and burned goodwill.
Products the user is already recommending organically. Two-sided value (both referrer and referee benefit). Clear moment-of-truth in the product where the ask feels natural. Consumer, prosumer, and SMB more than enterprise.
Two-sided incentive. Reward tied to activation (not just signup). Easy sharing surface embedded in a moment of user delight. Transparent tracking. Fraud protection from day one.
One-sided cash reward. Reward on signup only (spam magnet). Buried in settings. Manual redemption. No fraud protection. Every viral-referral horror story has at least three of these.
5-15% of new signups from a healthy program in the right category. Above 20% is a hyper-viral moment (Dropbox-style) and rare. Below 3% and the incentive isn't landing — kill the program or redesign it.
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