This is true. Every SaaS startup I've worked for, in the early days all of the "paying customers" are other startups (usually nepotistically funded by the same

This is true. Every SaaS startup I've worked for, in the early days all of the "paying customers" are other startups (usually nepotistically funded by the same VC firm). That's why a startup company can emerge from stealth mode with 10 unicorn logos on their homepage.