Cos was the CTO of Brex, which he helped scale from 40 people to over 1,000. Before that, he led engineering at Stripe. When he finally left, he had no startup idea—just a co-founder he trusted and one rule: whatever they built had to have massive impact. Six months of brainstorming later, they landed on accounting.
In this episode, Cos breaks down why he capped the company at 21 people after raising $75M, why everyone—engineers and salespeople alike—earns the exact same salary, how he hit a 100% pilot-to-production conversion rate with top accounting firms, and the counterintuitive process he used to pick accounting over every other industry.
Why You Should Listen
- Why the only reason to join an early-stage company should be the equity, never the cash.
- How Accrual hit a 100% pilot-to-production conversion rate selling to the largest accounting firms.
- Why he raised $75M but refuses to grow past 21 people.
- How to tell real product market fit from the "just one more feature" trap.
Keywords startup podcast, startup podcast for founders, product market fit, finding pmf, AI accounting, vertical AI, enterprise sales, pilot to production, Brex, Stripe, Cosmin Nicolaescu, Accrual, lean team
Chapters
- 00:00:00 Intro
- 00:01:56 The Moment of True Product Market Fit
- 00:09:46 Collapsing 6+ Tools Into One Platform
- 00:18:07 Leaving Brex to Start From Scratch
- 00:31:41 Landing H&R Block and Armanino
- 00:34:57 A 100% Pilot-to-Production Playbook
- 00:43:26 A 21-Person Company by Design
- 00:51:38 One Salary for Everyone
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