# Greg Williams

> Greg Williams is a Series C investor at DAG Ventures backing Video. See 1 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: [DAG Ventures](https://shizune.co/investors/profile/dag-ventures)
- Total investments: 1
- Last investment: Nov 2010
- Lead investor: 100%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/greg-williams-a425523

Greg Williams is a Series C investor at DAG Ventures focused on Video and Messaging. Greg Williams joined DAG Ventures in 2006.

## Contacts

5 contacts available for Greg Williams: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/greg-williams-bba4?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Video | 1 | 100% |
| Messaging | 1 | 100% |
| Communications Infrastructure | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| TokBox | TokBox develops and operates the OpenTok Video Platform, making it fast and easy to add live video communications to online and mobile websites, apps, and services. The scalable, customizable platform gives users the creative freedom to develop any video interaction, from one-to-one chats to large-scale broadcasts.The first platform toincorporate support for WebRTC, OpenTok caters to enterprises, entrepreneurs, and developers with powerful APIs, a global cloud infrastructure, and pre-configured solutions. OpenTok has been used to add video communications to more than 80,000 services by companies including Major League Baseball, Diet Coke, Ford, Doritos, Bridgestone, and Double Robotics.TokBox is a privately held company headquartered in San Francisco, CA. | $12M | Series C | Nov 15, 2010 |  |

1 of 1 investments shown.

## Co-investors
- [Bain Capital Ventures](https://shizune.co/investors/profile/bain-capital-ventures) — VC Fund, 1 deal together
- [Sequoia Capital](https://shizune.co/investors/profile/sequoia-capital) — VC Fund, 1 deal together

## About DAG Ventures

VC Fund · Palo Alto, United States

The DAG (Duff Ackerman & Goodrich) Ventures partnership began with investments in the cable TV, infrastructure, media, and wireless industries in the 1980's. The firm now invests in a variety of technology companies.

5 contacts available at DAG Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| Christopher Linn | Controller | https://shizune.co/investors/profile/christopher-linn |
| Deberah Stark | Administrative Controller | https://shizune.co/investors/profile/deberah-stark |
| Greg Williams | Managing Director | — |
| Greg Williams | Managing Director | — |
| Nicholas Pianim | Managing Director | — |

## Similar investors

### Similar stage
- [Sequoia Capital](https://shizune.co/investors/profile/sequoia-capital) — VC Fund
- [New Enterprise Associates](https://shizune.co/investors/profile/new-enterprise-associates) — VC Fund
- [Bessemer Venture Partners](https://shizune.co/investors/profile/bessemer-venture-partners) — VC Fund

## FAQ

### What does Greg Williams invest in?

Greg Williams invests primarily in Video, Messaging and Communications Infrastructure startups, most often at Series C stage. Most of the 1 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Greg Williams?

Public channels for Greg Williams include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did Greg Williams last invest?

The most recent investment recorded for Greg Williams closed in Nov 2010. Shizune tracks 1 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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