1st-time solo founder does 90 interviews in 90 days—closes a $25M Series A 2 years in. | Damien Lewke, Founder of Nebulock

1st-time solo founder does 90 interviews in 90 days—closes a $25M Series A 2 years in. | Damien Lewke, Founder of Nebulock

July 20, 2026 · 50 min · Season 4 · Episode 45

About this episode

Damien Lewke shares his journey of conducting 90 customer interviews in 90 days, leading to a successful $25M Series A funding for his startup Nebulock.

Damien left his job to start a startup solo. Two years later, Nebulock closed a $25M Series A. In between: 90 customer interviews in 90 days, a year of design partners, and a Fortune 500 deal that closed in 6 weeks. In this episode, Damien breaks down how his 90-in-90 customer discovery sprint killed his original architecture before he wasted money building it, how his design partner program converted 100% into paying customers, and how a POC playbook needing just 2 hours of customer time clo...

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