# Jeff Silverstein

> Jeff Silverstein is a seed investor at Andreessen Horowitz (Boston) backing Software and Medical. See 4 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Andreessen Horowitz](https://shizune.co/investors/profile/andreessen-horowitz)
- Location: Boston, United States
- Total investments: 4
- Last investment: Jan 2023
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/jeff-silverstein-54208555
- X (Twitter): https://twitter.com/jeffreysilv
- Website: https://x.com/jeffreysilv

Jeff Silverstein is a seed investor at Andreessen Horowitz in Boston focused on Software and Medical. Jeff Silverstein is the Venture Partner at Quiet Capital. Jeff Silverstein attended Harvard Business School.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 2 | 50% |
| Medical | 1 | 25% |
| Big Data | 1 | 25% |
| Analytics | 1 | 25% |
| Health Care | 1 | 25% |

8 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 25% |
| Pre-Seed | 1 | 25% |
| Series A | 1 | 25% |
| Series B | 1 | 25% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Broadcast | Copilot for Managers | $1.8M | Pre-Seed | Jan 23, 2023 |  |
| Vial | Vial was founded to execute on a mission to reimagine clinical trials by delivering faster and more efficient trials for sponsors. Vial’s powerful technology platform delivers faster, more efficient trials that are up to 50% cheaper. | $67M | Series B | Nov 30, 2022 |  |
| Hex Technologies | Hex is the platform for collaborative data science and analytics. It's all about empowering individuals to learn things, and organizations to know things, so they can make better decisions. Hex brings together SQL, Python, R, and no-code in powerful notebooks, and allows users to 1-click publish projects as interactive data apps that anyonecan use.The company was founded in 2019 and is based in San Francisco, California. | $16M | Series A | Oct 20, 2021 |  |
| ScienceIO | The data science company for healthcare | $8M | Seed | Oct 13, 2021 |  |

4 of 4 investments shown.

## Co-investors
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund, 3 deals together
- [Buckley Ventures](https://shizune.co/investors/profile/buckley-ventures) — VC Fund, 2 deals together
- [Amplify Partners](https://shizune.co/investors/profile/amplify-partners) — VC Fund, 1 deal together
- [Banana Capital](https://shizune.co/investors/profile/banana-capital) — VC Fund, 1 deal together
- [BoxGroup](https://shizune.co/investors/profile/boxgroup) — VC Fund, 1 deal together
- [Byers Capital](https://shizune.co/investors/profile/byers-capital) — VC Fund, 1 deal together

## About Andreessen Horowitz

VC Fund · Menlo Park, United States

Andreessen Horowitz is a venture capital firm specializing in investing in seed, start-ups, early, mid-stage, growth, and late-stage. It prefers to invest in the social media business and technology sector with a focus on software, back-end infrastructure, the infrastructure of the Internet, cloud computing, enterprise software and services,consumer, business Internet, mobile-Internet, consumer Internet, cloud computing, data storage, social network browsers data-storage, consumer electronics, networking functions, software related biology, biotech, and medicine companies at the intersection of computer science and life sciences with a focus on digital therapeutics, cloud technology in biology, and computational medicine.

5 contacts available at Andreessen Horowitz.

| Name | Title | Profile |
| --- | --- | --- |
| Andrew Chen | General Partner | https://shizune.co/investors/profile/andrew-chen |
| Anish Acharya | General Partner | https://shizune.co/investors/profile/anish-acharya |
| David George | General Partner | https://shizune.co/investors/profile/david-george-2 |
| Emily Bennett | investing partner | https://shizune.co/investors/profile/emily-bennett |
| Gabriel Vasquez | Partner | https://shizune.co/investors/profile/gabriel-vasquez-db03 |

## Similar investors

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

## FAQ

### What does Jeff Silverstein invest in?

Jeff Silverstein invests primarily in Software, Medical and Big Data startups, most often at Seed and Pre-Seed stage. Most of the 4 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 Jeff Silverstein last invest?

The most recent investment recorded for Jeff Silverstein closed in Jan 2023. Shizune tracks 4 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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