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  1. The a16z Show
  2. The Reputation Graph of Silicon Valley | Introducing Cosign
The Reputation Graph of Silicon Valley | Introducing Cosign

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show · Sep 25, 2026

a16z introduces Cosign, a new platform built to make professional reputation and endorsements in Silicon Valley more visible, durable, and valuable.

A Follow from Elon Musk Is a More Powerful Credential Than a Stanford Degree

In the tech world, peer-to-peer credentials from respected figures are often a more powerful signal of talent than traditional academic credentials. This social proof opens doors for collaboration, investment, and hiring, creating a new form of reputational capital.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

As AI Creates Content Noise, Authentic Human Endorsements Become the Scarcest Asset

AI can generate thousands of job applications and outreach messages, creating overwhelming noise. In this environment, a trusted human endorsement becomes a critical, scarce signal for filtering talent and opportunities, making human conviction more valuable than ever.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

Ephemeral Social Media Praise Should Be Captured as Durable Professional Reputation

Positive endorsements on platforms like X (formerly Twitter) are powerful but get lost in the feed. A dedicated platform can make this reputation durable by attaching these valuable, fleeting signals to a person's permanent professional profile for long-term benefit.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

LinkedIn's 'Connection' Signal Is Too Weak; Reputation Needs More Granularity

LinkedIn treats all connections equally, from a deep collaborator to a casual acquaintance, which dilutes the signal. A more effective professional graph requires granular distinctions like 'worked in the trenches with' to convey the true strength and context of a relationship.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

Privately Signaling Professional Intent Solves the Friction of Direct Outreach

Many valuable connections (hiring, funding) never happen due to the social risk of direct outreach. A platform that allows users to privately signal intent—like 'I would hire them'—and only reveals a match when interest is mutual can unlock massive, high-intent opportunities.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

Solve Network Cold Starts by Pre-Populating Profiles with Public Praise

The classic social network cold start problem can be solved by creating value before users even sign up. By using AI to aggregate existing public praise and endorsements into pre-generated profiles, platforms can entice users to join by showing them a profile that already celebrates them.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

Endorsing Someone Early Creates a Powerful, Long-Term 'Reputational Debt'

Publicly endorsing someone before they are successful isn't just altruistic; it's a strategic long-term investment. People remember who believed in them first, creating a deep sense of loyalty that often translates into future access to deals, talent, and opportunities for the original endorser.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

The Most Valuable Skill Is Identifying Talent and Companies Before the Market Does

Whether for investing, hiring, or procurement, the ability to recognize value before it becomes consensus is the ultimate competitive advantage. This 'non-consensus and right' skill is the core driver of success, but there's no system to track or reward it beyond financial investment.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago

Successful Startups Require Celebrating the Non-Founder 'Village' of Builders

The narrative of startup success is overly focused on founders. Building a great company requires a 'village' of talent across engineering, design, and marketing. Platforms that allow for public endorsement can help celebrate and give credit to these critical, often overlooked, contributors.

The Reputation Graph of Silicon Valley | Introducing Cosign thumbnail

The Reputation Graph of Silicon Valley | Introducing Cosign

The a16z Show·9 days ago