Cardinal is the AI platform for precision outbound. We run outbound for 40+ YC companies, including Mintlify, Greptile, and Luminai.

"Spray and pray" outbound is dead. The best sales teams operate with extreme precision — finding things in common with customers, monitoring their content, mapping inbound signals, and tracking website visitors. But doing this well means stringing together 10+ tools and hiring a GTM engineer. Cardinal replaces all of that.

Our AI agents find hyper-targeted leads, continuously monitor what prospects are posting and engaging with on social media, generate personalized snippets based on shared context, and orchestrate end-to-end outbound workflows across email and LinkedIn. Cardinal also captures inbound from website visitors, product signups, ad impressions, and social engagement — qualifying and routing them into sequences automatically.

Cardinal is founded by Devi and Jianna, 2x YC founders (S23, W26) and Harvard/MIT CS alums. Their last company, Leafpress, was an energy software company where they closed customers like Lindt and Honeywell from cold outbound.