Who are the ppl in your career who took a chance on you?
Who either put their time, reputation, or even money on the line to open doors for you?
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
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180,823
MTS AI 50
Live on Cosign
cosign.co/lists/mtslive/ai-f…
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Mike Markkula, a former manager at Intel, cosigned Steve Jobs and Steve Wozniak in 1977.
Jobs and Wozniak sold a VW bus and a calculator to fund their first computer. Markkula wrote them their first check.
Jobs: "I thought it was unlikely that Mike would ever see that $250,000 again, and I was impressed that he was willing to risk it."
Who are the ppl in your career who took a chance on you?
Who either put their time, reputation, or even money on the line to open doors for you?
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Browse Packy McCormick's top companies on Cosign
cosign.co/lists/packym/top-c…
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
3
4
40
6,079
Cosign retweeted
.@liangsays took a chance on me and gave me my first paid gig for film photography and since then I’ve been able to shoot incredible rooms across the city and was able to turn a nice little hobby into something I can really refine with my craft
Who are the ppl in your career who took a chance on you?
Who either put their time, reputation, or even money on the line to open doors for you?
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Ben Horowitz cosigned the Databricks co-founders in 2013, when they were Berkeley academics.
" When I met with them, they were like, 'We need to raise $200,000.'"
"I said, 'I'm not gonna write you a check for $200,000. I'll write you a check for $10 million.'"
"You need to build a company. You need to really go for it if you're gonna do this, otherwise you guys should stay in school."
Who are the ppl in your career who took a chance on you?
Who either put their time, reputation, or even money on the line to open doors for you?
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LSI Logic CEO Wilf Corrigan cosigned Jensen Huang to Don Valentine when he started Nvidia in 1993:
"Hey Don, I'm going to send a kid your way. He's one of my best employees. I'm not sure what he's going to do, but give him money."
Who are the ppl in your career who took a chance on you?
Who either put their time, reputation, or even money on the line to open doors for you?
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Cosign.
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
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9
130
12,748
Cosign retweeted
I met @jordanodinsky when I was a college student — I was taking time off, working at a startup in Tel Aviv and trying to figure out what to do with my life. He met me for coffee, brought me into his campus scout program, and told me to get on Twitter & start publishing my writing.
I followed his advice, and a couple months later I got my first internship in VC with @jmj through a tweet. Needless to say, Jordan (and then Jeff!) changed my life 🙂
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Paul Graham cosigned Sam Altman in a 2009 blog post, when Sam was running a location-sharing app called Loopt.
"Honestly, Sam is, along with Steve Jobs, the founder I refer to most when I'm advising startups."
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
2
4
45
5,184
Who would you invest in, no questions asked?
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
2
1
25
2,443
No one has put in more reps and hours into building communities for founders than @eriktorenberg and @david__booth
Human connection will become exponentially more valuable in a post-AI world
Erik and David are executing at lightspeed
Cosign!!
cosign.co/lists/brexton/comp…
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
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2
30
1,930
Cosign retweeted
Every job i’ve gotten in tech has been through X and I’ve always wanted a way to track/refer my network on here.
Excited about @cosign and what @david__booth @eriktorenberg and co are building.
Check out the companies I think you should join: cosign.co/lists/sonofalli/co…
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hello world
cosign.co
Excited to introduce @Cosign: the curated professional network for the startup community: cosign.co
Our goal is to create the following:
- A comprehensive startup directory of investors, companies, and operators, including what they worked on and who they worked on it with.
- Cosign graph: Who shaped your career? Who were you actually in the trenches with? Who would work with you again? Who thinks you’re someone to watch?
- Durable reputation: Great endorsements happen every day on X and disappear into the feed. Cosign attaches those signals permanently to people and companies.
- Discovery: Who are the best fintech angels? Which AI companies should I watch? Who are the best designers?
- Intent network: Privately signal “I’d invest in them,” “I’d hire them,” “I’d work with them,” or eventually even “I’d acquire this company.” Match people when interest exists on both sides.
Imagine if Wikipedia, LinkedIn, and OG AngelList had a baby. Though Cosign is a community, not a business.
In order to join, you need to be cosigned. Or you can apply directly.
David Booth and I started this idea 7 years ago but didn’t have the firepower to make it work. Now we do.
No one has really touched LinkedIn in 20 years. Excited to take a swing.
cosign.co
11
4
81
9,565