Cardinal is an NFT infrastructure protocol facilitator that allows NFTs to be conditionally owned. Cardinal offers royalty enforcement, rentals, subscriptions, and staking to increase the utility of NFTs. They provide several options for customizing the expiration and transferability of the issued NFT.
Founders
Hiring Pitch
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.
Tech Stack
Cardinal's stack is built for speed and scale:
- Frontend: Next.js + React + TypeScript + Tailwind CSS
- Backend: Multiple FastAPI microservices handling search, enrichment, sequencing, inbox, and webhooks
- Database: Supabase (PostgreSQL) + Redis for caching and job queues
- AI: LLM-powered agents for lead discovery, content monitoring, snippet generation, and intelligent sequence personalization
Hard problems we're solving: building AI agents that understand sales context, real-time content monitoring and signal detection across social platforms, multi-channel sequence orchestration across dozens of email domains, and enrichment pipelines that operate at scale.
Open Positions at Cardinal (3 Jobs)
3 open
