How He built a $8BN AI Company in 3 years (Harvey, Winston Weinberg)

In this episode, Wouter Teunissen sits down with Winston Weinberg, co-founder and CEO of Harvey AI, to unpack how he built one of the fastest-growing companies in modern history. Before founding Harvey, Winston was an associate at a law firm and had firsthand experience with the inefficiencies buried inside every law firm, endless research, document review, and repetitive drafting. Together with co-founder Gabriel Pereyra, a former Google Deep Mind researcher, they saw a once-in-a-generation opportunity to apply frontier models to the legal world. What started as a prototype built on GPT-3 quickly captured the attention of the industry and OpenAI itself, which went on to back Harvey as an investor. Today, Harvey is used by hundreds of elite law firms and global companies, redefining what professional AI can do in high-stakes domains. In this episode we talk thoroughly about how to build application layer A.I. companies, how Harvey is scaling rapidly, and why it's super important to work with the biggest (and most difficult to close) customers first. This episode is presented by Rho , the all-in-one banking platform for startups. Thousands of startups like Perplexity, Product Hunt, and more use Rho. You get everything you need to manage your startup’s cash. Exclusively for Biography Pod listeners and viewers, you’ll get a $1500 statement credit plus a ton of exclusive perks when you manage your company cash with Rho. To learn more, visit https://rho.co/biography Follow Winston: https://x.com/winstonweinberg Harvey: https://www.harvey.ai/ Follow Wouter: https://x.com/WouterTeunissen Biography Newsletter: https://biography.beehiiv.com/ Timestamps: 00:00:00 - Intro 00:00:40- Why should your startup go for the biggest/hardest customers FIRST? 00:03:58 - How to structure your team for high quality work 00:06:27 - How personalised Demos Help you Close Big Enterprise Customers 00:12:55 - When to use (and avoid) product led growth 00:17:23 - How is AI changing the way law is being serviced? 00:21:29 - Write this down. 2026 is the year of 'Ai Multiplayer' 00:26:43 - The future of Application Models, is Selling Work. Not just access. 00:33:06 - Why you must have a working prototype (and fast). 00:36:25 - Why CyberSecurity and Quality are incredibly important 00:38:17 - Your employees only care about these two things. 00:45:47 - All AI Companies are on a "massively compressed timeline 00:55:28 - You can't have a 3 year plan anymore. 01:01:52 - You need to get mass distribution quickly. 01:09:52 - The founder should be in every role before hiring for it. 01:14:37 - When do you delegate as you're hyper scaling? 01:17:22 - Cold emailing OpenAI to invest in Harvey