# Don Stein

> Don Stein is a seed investor backing Apps, Big Data and Computer Vision. See 1 investments, check sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Total investments: 1
- Last investment: Mar 2018
- Lead investor: 0%
- Last updated: Oct 2026

Don Stein is a seed investor focused on Apps and Big Data.

## Contacts

5 contacts available for Don Stein: 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/don-stein-2?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Apps | 1 | 100% |
| Big Data | 1 | 100% |
| Computer Vision | 1 | 100% |
| Virtual Reality | 1 | 100% |
| Machine Learning | 1 | 100% |

7 industries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| 6D.ai | 6D.ai develops application programming interfaces (APIs) for the Augmented Reality (AR) Cloud. 6D.ai offers 3D computer vision for spatial computing. The company focuses on infinite scale and real-time 3D reconstruction of the world on mobile sensors. |  | Seed | Mar 29, 2018 | http://6d.ai/ |

1 of 1 investments shown.

## Co-investors
- [Chang Corporation](https://shizune.co/investors/profile/chang-com-0014) — VC Fund, 1 deal together
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund, 1 deal together
- [Oxford Science Enterprises](https://shizune.co/investors/profile/oxford-science-enterprises) — VC Fund, 1 deal together
- [Oxford Science Enterprises](https://shizune.co/investors/profile/oxford-sciences-innovation) — VC Fund, 1 deal together

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### 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
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund

## FAQ

### What does Don Stein invest in?

Don Stein invests primarily in Apps, Big Data and Computer Vision startups, most often at Seed 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 Don Stein?

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 Don Stein last invest?

The most recent investment recorded for Don Stein closed in Mar 2018. 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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