a16z-backed Cosign launches as a durable reputation layer for the startup ecosystem
a16z · x · 2026-09-25
Erik Torenberg of a16z introduces Cosign, a curated professional network positioning itself as the "reputation layer" for the startup ecosystem.
- Durable endorsements: captures who actually worked with whom and would work together again, turning fleeting X praise into permanent reputation signals attached to people and companies
- Discovery: browsable, community-curated lists of breakout talent, angels, and AI companies to watch
- Intent network: private signals like "I'd invest/hire/acquire" that match parties when interest is mutual
- Includes an Industry Watch feed tracking updates from OpenAI, World Labs, Databricks and others
Related event: a16z Launches Cosign, Turning Endorsements Into a Career Reputation Layer(5 posts)→
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