
Written by a model from the transcript; not yet reviewed.
This episode introduces Cosign, a new professional reputation product and directory for the startup community designed to make human conviction and social capital visible. The host and guests discuss why peer-to-peer endorsements, career shaping mentor relationships, and public signals often matter more than traditional credentials like resumes or university degrees. They explain how early talent discovery, founder and company promotion, and the aggregation of public and private endorsements can fix information asymmetry in Silicon Valley. Listeners will learn how reputational graphs operate, why AI makes human signals increasingly scarce and valuable, and how platforms like LinkedIn, X, and AngelList have shaped the landscape of professional networking.
Marc Andreessen introduces the concept of Cosign, a new product focused on professional reputation and how it can bridge connections in Silicon Valley.
The hosts explain how Cosign uses endorsements and a reputation graph to signal trust and expertise beyond resumes.
Discussion of the three key endorsement categories—mentor, collaborator, and person to watch—and how they build a nuanced reputation profile.
Exploration of how Cosign captures public and private signals, including announcements and questions, to create lasting professional credibility.
The team contrasts Cosign with LinkedIn, X, and AngelList, highlighting gaps in current tools for discovering talent and opportunities.
Marc and the guests outline future features, such as granular connection data, AI integration, and a focus on celebrating non‑founder contributions.
The hosts discuss the potential for a new platform that aggregates high-quality endorsements and niche reputations within Silicon Valley.
The conversation shifts to Cosign, emphasizing its aggregation of latent industry data and its potential to empower the tech community.
The hosts cite Angelist and Wikipedia as inspirations for building a community-driven, profile-rich platform.
The hosts explain how showcasing others’ endorsements can attract users to the platform, highlighting the role of AI in scaling this.
They detail how Cosign pulls data from public sources to create structured, high-quality reputation graphs.
The team invites the community to contribute to the platform, emphasizing collaborative editing and continuous improvement.
Twitter Versus College Educationstory
A speaker shares a story from David Perel about how his Twitter account provided more career and personal value than his quarter-million-dollar college education.
Three Core Profile Endorsementsstrategy
The hosts outline the three core endorsements featured on every Cosign profile: who shaped your career, who you would be in the trenches with, and who is a person to watch.
Curated Company Directoriesdata
A speaker highlights Paddy McCormick curating 37 deep-tech and vertical integration companies on the site to help others break into the space.
The Power of Professional Introductionsinsight
A speaker explains how putting reputation behind a cold introduction through a cosign can successfully open doors and lubricate the wheels of social capital.
The Frustrations with LinkedIninsight
The hosts discuss how LinkedIn treats all connection types identically and fails to capture deep qualitative context about professional relationships.
Managing High Volume Outreachinsight
A speaker describes receiving thousands of responses to a job posting and argues that human endorsement will become the scarcest filter in an AI-driven world.
“Be so good that people do business through you.”
“I want that person to be able to take the cosign I've given them, and they might be able to go straight to Josh.”
“The most important skill in this industry, or perhaps in the world, is your ability to identify things before the market.”
“We want, on every profile, to have at least three. One is, who shaped your career?”
“The most valuable data in all of Silicon Valley is who has conviction in who and who can give you a real read on a person for so many decisions.”
“People always remember, like by order of magnitude, more the people who believed in them first.”
“I think there's room for something that's really special for the community that we have and that, you know, combines the things that are happening ephemerally with the things that are happening professionally, with the depth that is going to be great.”
“And if Cosign works, great. And it still only serves the tech community as a huge win.”
“And if it then, other communities and other industries figure out, they should figure out how to take part in this too, and bring some of that Silicon Valley energy to more places, that's even better.”
a16z’s Erik Torenberg sits down with Josh Elman, Olivia Moore, and David Booth to introduce Cosign, a new product built around professional reputation and the people, companies, and products you’re willing to put your name behind. They unpack a simple idea at the heart of Silicon Valley: some of the most valuable professional signals aren’t credentials, but who believes in you. From the mentor who shaped your career to the colleague you’d work with anywhere or the young builder you think everyone should be watching, Cosign is an attempt to make those signals more visible and durable. They also discuss why human endorsements may become more valuable as AI makes outreach and information abundant, what existing professional networks get right and miss, and how making reputation more legible could help talented people get discovered earlier, find collaborators, and carry the work they’ve done behind the scenes into whatever they do next.
11,225 words · 5 speakers
Speaker names marked are inferred from speaking time and the show’s known hosts — they are not voice-verified.
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