Calendly Growth Playbook

Scheduling meetings via email is a nightmare.

The Ultimate Viral Loop: Calendly is the textbook example of inherent product virality. Every time a user sends a scheduling link to a non-user, they are providing a 'product demonstration' where the recipient experiences the core value proposition (no back-and-forth emails) in real-time. This tactical use of the service itself as the primary marketing channel meant that their Customer Acquisition Cost (CAC) was near zero, allowing them to scale to millions of users with almost no traditional ad spend.