Companies like Dropbox, Zoom, Slack, Atlassian, and DocuSign grew into multibillion-dollar companies using the three-step “Freemium” product strategy: (1) instead of hiring an expensive sales force, give away software for free; (2) let happy users tell others; (3) offer a premium subscription version, producing a recurring revenue stream. Over the last three decades, Freemium strategy has evolved into a practice known to tech industry insiders as “product-led growth.”