the.com/viral loop
the engine where every new user is secretly recruited to build your next batch of users
means A self-perpetuating growth mechanism in which each user, through their normal use of a product, naturally invites or exposes new users, who then repeat the cycle.
from A modern marketing and tech compound. 'Viral' borrows from epidemiology — Latin 'virus,' meaning poison or venomous slime — repurposed in the 1990s to describe ideas and products that 'spread' like infections from person to person. 'Loop' adds the engineering sense of a self-feeding cycle, as in a feedback loop. The pairing crystallized in the startup and Silicon Valley vocabulary of the 2000s, when growth strategists realized the most efficient marketing was the kind users did to each other, free of charge.
- Coined
- Popularized by PayPal and Hotmail growth tactics
- K-factor
- Above 1 means exponential self-sustaining growth
- Hotmail trick
- One footer line added 12 million users
- Hidden cost
- Most loops decay fast as novelty fades
- Built in
- Sharing is the product, not a feature
facebook social plugins — grew from 50m to 500m users in 18 months (2008-2009) through viral invite loops
snapchat streaks — consecutive daily exchanges created compulsive daily active user retention at 78% in 2015-2016
robinhood referral program — gave free stock for each friend invited, driving 2m+ signups in 2018