# Julie Tsai

> Julie Tsai is a pre-seed investor at Ballistic Ventures backing Cyber Security. See 1 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Ballistic Ventures](https://shizune.co/investors/profile/ballistic-ventures)
- Location: San Mateo, United States
- Total investments: 1
- Last investment: Mar 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/julietsai/
- X (Twitter): https://twitter.com/446688
- Website: https://x.com/446688

Julie Tsai is a pre-seed investor at Ballistic Ventures in San Mateo focused on Cyber Security. Julie Tsai is based out of San Mateo, California and is the CISO-in-Residence of Ballistic Ventures. Julie previously worked at Roblox as a CISO. Julie Tsai attended the Stanford University. Julie Tsai has been certified as a CISSP.

## Contacts

5 contacts available for Julie Tsai: 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/julie-tsai?utm_source=investor_profile

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Leen | Leen is a unified API for security tools and data. | $2.8M | Pre-Seed | Mar 25, 2024 |  |

1 of 1 investments shown.

## Co-investors
- [11.2 Capital](https://shizune.co/investors/profile/112capital) — VC Fund, 1 deal together
- [Inner Loop Capital](https://shizune.co/investors/profile/innerloop-capital) — VC Fund, 1 deal together
- [Preface Ventures](https://shizune.co/investors/profile/preface-ventures) — VC Fund, 1 deal together

## About Ballistic Ventures

VC Fund · San Francisco, United States

Ballistic Ventures operates as a venture capital firm and offers the unparalleled benefit of an experienced, connected team that is focused on cybersecurity. They believe the essential step they can take today is to provide collective experience, network, and enthusiasm to the world's finest cybersecurity entrepreneurs.

5 contacts available at Ballistic Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| Julie Tsai | CISO-in-Residence | — |
| Phil Venables | Partner | — |
| Barmak Meftah | Co-Founder & General Partner | — |
| David Hahn | CISO Operating Partner | — |
| David Schellhase | Entrepreneur in Residence | — |

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## FAQ

### What does Julie Tsai invest in?

Julie Tsai invests primarily in Cyber Security startups, most often at Pre-Seed stage. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Julie Tsai?

Public channels for Julie Tsai 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 Julie Tsai last invest?

The most recent investment recorded for Julie Tsai closed in Mar 2024. 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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