Cardinal

AI Platform for Precision Outbound

Y CombinatorWinter 2026ActiveB2B

What they do

Problem

Modern outbound sales requires highly precise, signal-driven workflows that are hard to execute because they involve stitching together many tools and often a dedicated GTM engineer.

Solution

Cardinal is an AI platform with agents that build and run precision outbound workflows that would typically require full-time GTM engineering.

Who it's for

B2B go-to-market and sales teams (especially startups like YC companies) that run outbound prospecting and growth.

Founders

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

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)