cosign.co
Overview
I designed cosign.co/landing, the landing page for Cosign: a16z's curated professional network for the people and companies that drive the startup ecosystem. I also worked on surfaces inside the product itself.
The landing page walks through the product one surface at a time, and it's interactive; the example profiles, lists, and feeds respond when you play with them. Cosign launched on September 25, 2026, and the launch announcement passed 1.5M views on X.