Adam Bain

Co-Founder & Managing Partner, 01 Advisors Fund
Adam Bain, a go-to-market operator who scaled Twitter's revenue to billions as COO, specializes in $5M–$100M growth and helps Israeli technical founders with U.S. market entry and senior sales hiring.
How to contact Adam Bain
Stages their fund invests in
N/A
Sectors their fund invests in
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Avg Check
$1M - $10M
N/A
Does their fund Lead?
Yes
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Geos their fund invests in
USA
Adam Bain
Stages their fund invests in
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Sectors their fund invests in
SaaS
AI
Enterprise
Fintech
Cybersecurity
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Avg Check
$1M - $10M
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Leads?
Yes
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About Adam Bain

Adam Bain brings an unusually go-to-market focused approach to venture investing, drawing from his experience scaling Twitter's revenue from zero to billions as COO and his belief that elite sales leaders should be hired slightly before product-market fit to help discover and refine it. He positions himself as a specialist in the $5M to $100M revenue journey rather than a generalist board member, emphasizing his operator background and focusing particularly on helping technical Israeli founders with U.S. market entry and senior sales hiring.

Adam Bain's Interests

What they've been talking about across their social media accounts
  • Deep enthusiasm for Miami of Ohio basketball and Cleveland-based sports teams. Tweets frequently track Miami's unbeaten streaks, playfully labeling them America's team, and he defends Cleveland culture against jokes, even standing up for Olive Garden because of his local roots.
  • Appreciation for extreme founder grit and operational depth. Highlighted the Opendoor CEO working late with a bed in the corner of the office and praised leaders who combine aggressive goals with such mastery of the details that they have deep context on every aspect of the business.
  • Focus on AI infrastructure and the necessity of human data for model training. Consistently promotes portfolio companies like Baseten for their inference capabilities on Nvidia hardware and Micro1 for supplying the real-world human actions needed to train frontier AI models.
  • Lighthearted approach to corporate norms and parenting struggles. Shared a story about defying design standards by using Comic Sans for an entire slide in a high-stakes presentation and related to the struggle of teenagers eating all the groceries in the house.
  • Support for founders with non-traditional or undercover backgrounds. Shared fascination with stories like Grimes working as a rocket engineer on weekends or the Uber CEO working as a driver before taking the company public.

About their Fund

01 Advisors Fund

Sectors
SaaS, AI, Enterprise, Fintech, Cybersecurity
Rounds
Series A - Series B+
Avg Check Size
$1M - $10M

01 Advisors is led by former Twitter CEO Dick Costolo, former Twitter COO Adam Bain, and Facebook's former Chief Revenue Officer David Fischer, who bring first-hand experience scaling Twitter, Google, and Facebook from early revenue to tens of billions in sales. They operate as "venture coaches" who deliberately avoid taking board seats so they can provide candid advice without formal constraints, focusing exclusively on Series B companies ($15M checks) that have product-market fit but need help building professional sales organizations and revenue operations.

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