# Helen Greiner

> Helen Greiner is a seed investor in Boston backing Hardware and Beauty. See 3 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: Boston, United States
- Total investments: 3
- Last investment: May 2022
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/helen-greiner-382295
- X (Twitter): https://twitter.com/helengreiner
- Website: https://x.com/helengreiner

Helen Greiner is a seed investor in Boston focused on Hardware and Beauty. Helen Greiner commands a presence in the field of robotics. Co-founding iRobot (NASDAQ:IRBT) in 1990, Helen Greiner served as president until 2004 and chairman until 2008. During her tenure, Helen Greiner guided iRobot into its position as a global leader with the release of the Roomba™, the PackBot™ and SUGV military robots. She built a culture ofpractical innovation and delivery that led to the deployment of 6,000 PackBots with our troops. In addition, Helen Greiner headed up iRobot’s financing projects, raising $35M in venture capital for a $75M initial public offering. Greiner holds a bachelor’s degree in mechanical engineering and a master’s degree in computer science, both from the Massachusetts Institute of Technology. Accolades – One of America’s Best Leaders, named by the Kennedy School at Harvard in conjunction with the U.S. News and World Report “Innovator for the Next Century” by Review Magazine Global Leader of Tomorrow and Young Global Leader by the World Economic forum Received prestigious Pioneer Award from the Association for Unmanned Vehicle Systems International (AUVSI) DEMO God Award and DEMO Lifetime Achievement Award New England Entrepreneur of the Year by Ernst and Young Inducted into the Women in Technology International (WITI) Hall of Fame Distinctions – A Trustee of the Massachusetts Institute of Technology (MIT), Boston Museum of Science (MOS) On the Board of Visitors of the Army War College (AWC) and Army Science Board (ASB) Served as the elected President and Board Member of the Robotics Technology Consortium (RTC) A Trustee of the National Defense Industrial Association (NDIA)

## Contacts

5 contacts available for Helen Greiner: 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/helen-greiner?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $500k–$5.6M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Hardware | 2 | 67% |
| Beauty | 1 | 33% |
| Sensor | 1 | 33% |
| Robotics | 1 | 33% |
| Software | 1 | 33% |

8 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 33% |
| Series A | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Bounce Imaging | They develop sensor technology to save the lives of first responders by allowing them to safely view hazardous environments remotely and at low cost. | $4.2M | Series A | May 02, 2022 | http://bounceimaging.com |
| Preemadonna | Preemadonna builds Physical AI and creative expression infrastructure for nails, bodies, and beyond. Our flagship product, Nailbot, prints custom nail art in five seconds: the first consumer device to make fandom and professional-grade creative output instant, personal, and at home. 1,000+ units shipped. 10+ utility patents. Backed by Version OneVentures, Amazon Alexa Fund, SOSV/HAX, Two Small Fish, and angels | $5.6M | Seed | Jan 26, 2021 | http://www.preemadonna.com/ |
| Preemadonna | Preemadonna builds Physical AI and creative expression infrastructure for nails, bodies, and beyond. Our flagship product, Nailbot, prints custom nail art in five seconds: the first consumer device to make fandom and professional-grade creative output instant, personal, and at home. 1,000+ units shipped. 10+ utility patents. Backed by Version OneVentures, Amazon Alexa Fund, SOSV/HAX, Two Small Fish, and angels | $500K | Seed | Sep 13, 2015 | http://www.preemadonna.com/ |

3 of 3 investments shown.

## Co-investors
- [Amazon Alexa Fund](https://shizune.co/investors/profile/amazon-alexa-fund) — VC Fund, 1 deal together
- [Backstage Capital](https://shizune.co/investors/profile/backstage-capital) — VC Fund, 1 deal together
- [Cleo Capital](https://shizune.co/investors/profile/cleo-capital) — VC Fund, 1 deal together
- [Draper Associates](https://shizune.co/investors/profile/draper-associates-2) — VC Fund, 1 deal together
- [Garage Capital](https://shizune.co/investors/profile/garage-capital) — VC Fund, 1 deal together
- [Good Growth Capital](https://shizune.co/investors/profile/good-growth-capital) — VC Fund, 1 deal together

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## FAQ

### What does Helen Greiner invest in?

Helen Greiner invests primarily in Hardware, Beauty and Sensor startups, most often at Seed and Series A stage. Most of the 3 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Helen Greiner's check size?

Helen Greiner typically joins rounds of $500k–$5.6M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Helen Greiner participates in.

### How do I contact Helen Greiner?

Public channels for Helen Greiner include LinkedIn, X (Twitter) and the website linked on this profile. 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 Helen Greiner last invest?

The most recent investment recorded for Helen Greiner closed in May 2022. Shizune tracks 3 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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