# Bob Rosin

> Bob Rosin is a pre-seed investor at Defy.vc backing Artificial Intelligence and Real Time. See 17 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Defy.vc](https://shizune.co/investors/profile/defy-partners)
- Location: San Francisco Bay Area, United States
- Total investments: 17
- Last investment: Dec 2025
- Lead investor: 24%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/brosin
- X (Twitter): http://twitter.com/bobrosin

Bob Rosin is an Investment Partner at Defy.vc. As a founder, serial entrepreneur, and former leadership team member at Stripe, LinkedIn, and Skype, he has experienced all facets of startup life from founding companies, to raising capital, scaling growth, and M&A. He has also led the partnerships function at massive scale for world-classcompanies. He is excited to partner with and mentor the next generation of founders of category-leading technology businesses. In addition to his work as an entrepreneur and executive, he has been an active angel investor and advisor to companies including Stripe, Workato, Tenor (acquired by Google), Cursor Data (Data Robot), MindMeld (Cisco), Instawork, Tonal Fitness, Accord, TruePlan, Prairie Health, Capchase, and Curated.“I know how hard it is to build a company from zero and to build a team, create a company culture, evangelize the first customers, create a winning product, and make the thousands of decisions involved in shepherding a company to massive scale.”His three startups were each pioneers in the development of key technology trends: internet infrastructure, mobile computing, and video communications. At Bang Networks, they developed the first global infrastructure for dynamic content delivery on the Internet. OQO had a radical vision that one day we would all carry an internet-connected computer in their pocket. And Qik was the first breakthrough video calling app on phones. Through these experiences he cut his teeth not only on building companies, but in creating new markets as well.After Qik was acquired by Skype, he was tasked to lead their business development function which became a platform for him to accelerate user acquisition and revenue growth. After Microsoft’s $8.5B acquisition of Skype, he stayed on as VP & GM and learned to appreciate execution at massive scale.Next he joined LinkedIn as VP of Business Development and reported to Jeff Weiner as a member of the Product Executive team, where he helped drive growth to hundreds of millions of users, scaling to $7B in SaaS revenue, and managing over one hundred thousand developers participating in their API program. This experience taught him the power of building a mission-oriented culture and of putting members first.After Microsoft acquired LinkedIn for $26.2B, he moved on to join the executive leadership team at Stripe as head of partnerships. While diving deep into the world of payments, managing hypergrowth at Stripe also taught him of the power of building for developers, achieving leverage through partners, and imbuing all activities with deep rigor and quality of thought.Earlier on, he started his career by living in Japan for five years, where he passed the Level 1 Japanese language proficiency exam and was a columnist for a Japanese national newspaper while working at Sony Corporation. He earned a second degree black belt in Aikido, he was the first author on 10 granted patents, and was winner of the Dubilier Prize for Entrepreneurship at Harvard Business School. He is a proud father of two daughters, the best prize of all.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Artificial Intelligence | 6 | 35% |
| Real Time | 4 | 24% |
| Business Process Automation (BPA) | 4 | 24% |
| Software | 3 | 18% |
| Digital Signage | 3 | 18% |

42 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Pre-Seed | 8 | 47% |
| Seed | 7 | 41% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 12 | 71% |
| Indonesia | 1 | 6% |
| United Kingdom | 1 | 6% |
| Trinidad and Tobago | 1 | 6% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Criocore | Spin-out from Harvard Medical School. Criocore is a Cambridge-based startup using cryobioprinting to create shelf-ready 3D human tissues, replacing animal testing in drug discovery. | $200K | Pre-Seed | Dec 30, 2025 |  |
| Datasent | Datasent is a privacy-first data substrate providing lossless encoding for secure AI and analytics without exposing or moving raw records. | $200K | Pre-Seed | Dec 29, 2025 |  |
| Chief Rebel | Chief Rebel is a consulting company that offers business and investment exit strategy and advice. | $200K | Seed | Dec 19, 2025 |  |
| Blitz | Blitz is a financial platform for the creator economy, offering instant payouts and automated workflows to streamline brand-creator partnerships. | $200K | Pre-Seed | Nov 26, 2025 |  |
| Simply Agnostic | Simply Agnostic Controls, Inc. develops intuitive, cloud-connected HVAC automation systems designed to streamline commercial building management. | $200K | Pre-Seed | Nov 18, 2025 |  |
| Sunate | Sunate is an AI-driven property intelligence platform providing advanced roof analytics and lead data to optimise solar sales operations. | $200K | Pre-Seed | Nov 18, 2025 |  |
| Velocisure | VelociSure is an AI-driven operating system for P&C insurers, automating regulatory research and filings to optimise product lifecycles. | $200K | Pre-Seed | Nov 13, 2025 |  |
| Precognition Labs | Precognition Labs develops AI infrastructure for automating trust, safety, and risk operations in enterprise marketplaces. By combining automation with human oversight for high-stakes decisions, we help platforms scale operations without compromising accuracy or compliance. | $200K | Pre-Seed | Nov 11, 2025 |  |
| FormVue | FormVue provides AI-enhanced video qualification for contractors, automating project scoping to increase precision and operational efficiency. | $200K | Pre-Seed | Jul 11, 2025 |  |
| Writ | Writ helps its partners make informed decisions. By providing a space for all teams to explore, discuss, and act on data, Writ accelerates a data-driven culture. | $3.8M | Seed | Apr 11, 2024 |  |

10 of 17 investments shown.

## Co-investors
- [GK-Plug and Play Indonesia](https://shizune.co/investors/profile/gk-plug-and-play-indonesia) — VC Fund, 2 deals together
- [MMV Europe & Asia-Pacific](https://shizune.co/investors/profile/massmutual-ventures-southeast-asia-mmv-sea) — VC Fund, 2 deals together
- [Next Billion Ventures](https://shizune.co/investors/profile/next-billion-ventures) — VC Fund, 2 deals together
- [Quest Ventures](https://shizune.co/investors/profile/questventures) — VC Fund, 2 deals together
- [1984 Ventures](https://shizune.co/investors/profile/1984-ventures) — VC Fund, 1 deal together
- [468 Capital](https://shizune.co/investors/profile/468-capital) — VC Fund, 1 deal together

## About Defy.vc

VC Fund · San Mateo, United States

Defy is a seed-stage venture fund focused on emerging high-potential opportunities. It is driven by a passion for working closely with entrepreneurs, especially through the transformative time after seed funding. The firm invests in people and in their conviction and talent for creating real change.Defy was founded in 2016 by Neil Sequeira andTrae Vassallo and is based in San Mateo, California, United States.

5 contacts available at Defy.vc.

| Name | Title | Profile |
| --- | --- | --- |
| Bob Rosin | Partner | https://shizune.co/investors/profile/bob-rosin |
| Brian Rothenberg | Partner | https://shizune.co/investors/profile/brian-rothenberg |
| Kamil Saeid | Partner | https://shizune.co/investors/profile/kamil-saeid |
| Madison McIlwain | Partner, Seed | https://shizune.co/investors/profile/madison-mcilwain |
| Medha Agarwal | General Partner | https://shizune.co/investors/profile/medha-agarwal |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund
- [Everywhere Ventures](https://shizune.co/investors/profile/everywhere-ventures) — VC Fund

## FAQ

### What does Bob Rosin invest in?

Bob Rosin invests primarily in Artificial Intelligence, Real Time and Business Process Automation (BPA) startups, most often at Pre-Seed and Seed stage. Most of the 17 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Bob Rosin last invest?

The most recent investment recorded for Bob Rosin closed in Dec 2025. Shizune tracks 17 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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