Cortier AI

About Us

Siyu Chen — Co-founder, Product

Siyu spent years interacting with AI — and noticing all the places where it quietly fails. Not because the technology isn't capable, but because it was never designed to actually know you. At Cortier, she focuses on building an experience that feels less like using a tool and more like having someone in your corner.

Siyu Chen — Co-founder, Product

Dong Liang — Co-founder, Engineering

Dong Liang previously built distributed systems at Google (Spanner) and Rubrik — infrastructure that had to work at scale and never go down. At Cortier, he applies that same thinking to a different problem: making sure your AI is always there, always yours, and never shared with anyone else.

Dong Liang — Co-founder, Engineering

We believe everyone deserves an assistant that actually knows them.

Not a chatbot. Not a search bar. A presence that pays attention, remembers what matters, and shows up before you have to ask. Not when you open the app — all the time.

Cortier helped us research, plan, and build this product — from early architecture decisions to the words on this page. It's not just what we're building. It's how we build. This product is its own proof of concept.