They applied to YC with $320 of monthly revenue and a video call that never connected. Seven years later they dropped the word “phone” from the name.

OpenPhone's S18 application shows 1,500 users, 32 paying customers and $320 of revenue in the last month. In September 2025 the company renamed itself Quo, raised $105M and reported nearly 90,000 businesses. The thesis that got them there is in the application.