Alex Blum
Angel Investor · Managing Partner at Greenwich Venture Capital Advisors
New York, United States
Alex Blum is a seed investor at Greenwich Venture Capital Advisors in New York focused on Advertising and Digital Media. Alex Blum is the Chief Operating Officer of Unity. He previously worked at tvScientific as an Investor and Advisor. Alex Blum attended Seattle University.
- Total investments:
- 3
- Last investment:
- Lead investor:
- 33%
Last updated:
For AI agents: llms.txt
Industries Alex Blum invests in
Stages Alex Blum invests in
Countries Alex Blum invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Investment Focus
Industry
- Advertising 2 (67%)
- Digital Media 2 (67%)
- SaaS 1 (33%)
- Privacy 1 (33%)
- Big Data 1 (33%)
Stage
- Seed 2 (67%)
- Funding Round 1 (33%)
Country
- United States 2 (67%)
- Canada 1 (33%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Optable is a data collaboration and clean room solution designed for the advertising ecosystem in the age of privacy. The product was inspired by the radical transformation in how audience data is governed, connected, and activated. Optable takes an end-to-end approach to data collaboration and is integrated with ad delivery platforms for secureactivation, making it possible to deploy campaigns directly from a clean room. It is the only clean room solution that offers frictionless collaboration and interoperability enabling customers to safely and securely match audience data with any partner. | $3.6M / Seed / May 05, 2021 | ||
| Tru Optik identity resolution powers the streaming media ecosystem. Tru Optik’s patented Household Graph™ of more than 80 million homes enables the world’s leading brands, agencies, media companies, and platforms to engage consumers across OTT, streaming audio, and gaming with unmatched scale, accuracy and privacy compliance. | Seed / Sep 29, 2015 | ||
| DashBid is a programmatic exchange and DMP that enables audience identification and buying by engagement and segmentation. The company works directly with publishers and media buying agencies to help them easily manage and sell online advertising inventory. It was founded in 2010 and headquartered in Fort Lee, New Jersey. | Apr 24, 2015 |
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FAQ
What does Alex Blum invest in?
Alex Blum invests primarily in Advertising, Digital Media and SaaS startups, most often at Seed and Funding Round 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.
How do I contact Alex Blum?
Public channels for Alex Blum include LinkedIn, X (Twitter) and Facebook. 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 Alex Blum last invest?
The most recent investment recorded for Alex Blum closed in May 2021. 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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