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Cardinal

AI Platform for Precision Outbound

Hey YC! We're Devi and Jianna - the founders of Cardinal. TL;DR: Cardinal is the AI platform for precision outbound. We run outbound for 40+ YC companies, like Mintlify, Greptile, and Luminai. The Problem “Spray and Pray” outbound is dead. The best teams at outbound do it with extreme precision. Finding things in common with your customers, staying in touch with them through their content, mapping inbound from signups and ads, tracking website visitors, monitoring various signals, etc. This sounds great in theory, but in reality involves stringing together 10+ tools and hiring a GTM engineer. That’s where Cardinal comes in. Cardinal is an AI platform for precision outbound. Our agents can create workflows that normally require the work of fulltime GTM engineers. If you're a founder or sales leader looking to bring AI into your sales org, would love to chat!
Active Founders
Devi Jha
Devi Jha
Founder
Devi dropped out from Harvard with(out) a degree in Computer Science. YC S23 with an energy software company, sold it to Johnson Controls (NYSE: JCI).
Jianna Liu
Jianna Liu
Founder
Jianna graduated from MIT with a degree in computer science. She has worked on the software teams at Meta, DoorDash, Nvidia. Previously YC S23, energy software company. Acquired by Johnson Controls (NYSE: JCI)
Company Launches
Cardinal: AI Platform for Precision Outbound
See original launch post

Hey YC! We're Devi and Jianna - the founders of Cardinal.

TL;DR: Cardinal is the AI platform for precision outbound. We run outbound for 40+ YC companies, like Mintlify, Greptile, and Luminai.

The Problem

“Spray and Pray” outbound is dead. The best teams at outbound do it with extreme precision. Finding things in common with your customers, staying in touch with them through their content, mapping inbound from signups and ads, tracking website visitors, monitoring various signals, etc. This sounds great in theory, but in reality involves stringing together 10+ tools and hiring a GTM engineer.

That’s where Cardinal comes in.

What can you do with Cardinal

Cardinal is an AI platform for precision outbound. Our agents can create workflows that normally require the work of fulltime GTM engineers.

🔍 Find the perfect leads: Whether you need to map your entire TAM, enrich folks going to a conference, invite leads to a dinner you’re hosting, etc. Cardinal finds the most precise leads for you to reach out to.

📡 Monitor content from your customers:  Our agents continuously track what your prospects are posting, sharing, and engaging with on social media, so you can stay up to date on what they are doing.

✂️ Snippets that write themselves Cardinal generates hyper-specific snippets based on things you and your team have in common with your customers.

⚙️ Build full workflows Design end-to-end outbound workflows across email and linkedin.

📥 Capture inbound too Set up website visitors, product signups, social media likes and comments, Ad impressions, etc. → qualify it and add them to your sequences.

The Team

We’re Devi and Jianna - we are 2x YC founders (S23, W26). Our last company, Leafpress, was an energy software company - we closed folks like Lindt, Honeywell, etc. from cold outbound. We’re Harvard and MIT CS alums.

Our Asks

If you are a sales leader wanting to add agents to your workflow and finally build a strong outbound engine, please talk with us - we’d love to help.

-Devi and Jianna

Jobs at Cardinal
San Francisco, CA, US
$120K - $150K
1+ years
San Francisco, CA, US
$200K - $250K
1.00%
Any (new grads ok)
San Francisco, CA, US
$100K - $150K
0.10% - 1.00%
1+ years
Cardinal
Batch:Winter 2026
Status:
Active
Primary Partner:Gustaf Alstromer