a16z Launches Cosign, a Reputation Layer for the Startup Ecosystem

a16z's Erik Torenberg launches Cosign, a curated professional network that builds a verifiable endorsement graph, turning early-stage trust and backing into a queryable reputation asset for the startup ecosystem.

2026-09-25 ~ 2026-09-25 · 3 related posts

• a16z launches Cosign, a professional reputation product built on endorsements — a16z · 2026-09-25
• a16z-backed Cosign launches as a durable reputation layer for the startup ecosystem — a16z · 2026-09-25

1 near-duplicate retellings: a16z