Cosign
Curated professional network for the startup ecosystem
Community-submitted · content unverified. This organization has not verified ownership or the information in this profile.
About
Cosign is a curated professional network for founders, operators, investors, and companies in the startup ecosystem. Profiles emphasize attributed cosigns and work history, and the product includes curated lists, community rankings, industry activity, and startup job listings. It launched publicly around September 25, 2026 as a product from a16z's New Media product team and is available at cosign.co.
- Website
- cosign.co
- Location
- United States
- Added via
- web
- Ownership
- unclaimed
Where to go
Products
- Cosign — Endorsement-based professional network for startups · Saas
Social profiles
- XX / Twitter