# Alex van Leeuwen

> Alex van Leeuwen is a seed investor in Amsterdam backing Database and Software. See 3 investments, round sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: Amsterdam, The Netherlands
- Total investments: 3
- Last investment: Aug 2020
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/alexvanleeuwen/
- X (Twitter): https://twitter.com/alexvanleeuwen
- Website: http://www.buzzcapture.com/

Alex van Leeuwen is a seed investor in Amsterdam focused on Database and Software. Alex van Leeuwen

## Contacts

5 contacts available for Alex van Leeuwen: 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/alex-van-leeuwen?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Database | 2 | 67% |
| Software | 2 | 67% |
| Open Source | 2 | 67% |
| Search Engine | 2 | 67% |
| Cloud Computing | 2 | 67% |

15 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 67% |
| Pre-Seed | 1 | 33% |

## Investments

| Company | Description | Round size | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| SeMI Technologies | SeMI Technologies is the company behind the open-source vector search engine Weaviate. SeMI offers products in the form of SaaS and PaaS licenses for Weaviate to a wide variety of industries. | $1.2M | Seed | Aug 01, 2020 |  |
| Weaviate | Weaviate offers products in the form of the Weaviate Cloud Service to a wide variety of industries. Previously known as SeMI technologies. | $1.2M | Seed | Aug 01, 2020 |  |
| Tykn | Tykn is an award-winning Dutch startup developing Self-Sovereign Identity solutions. Having spent 3 years developing the infrastructural SSI tech through projects for high-stake user bases with the likes of the UNDP, Red Cross & Turkish government, Tykn developed Ana: SSI made simple. The easiest way for companies to integrate SSI into theirexisting workflows. | $137K | Pre-Seed | Jan 17, 2018 |  |

3 of 3 investments shown.

## Co-investors
- [ING Ventures](https://shizune.co/investors/profile/ing-ventures-7502) — VC Fund, 2 deals together
- [Zetta Venture Partners](https://shizune.co/investors/profile/zetta-venture-partners) — VC Fund, 2 deals together

## Similar investors

### Similar industry
- [Praxis](https://shizune.co/investors/profile/praxis-2) — VC Fund
- [Social and Sustainable Capital](https://shizune.co/investors/profile/social-and-sustainable-capital) — VC Fund
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## Featured in investor lists
- [Social Impact Angel Investors](https://shizune.co/investors/social-impact-angel-investors)

## FAQ

### What does Alex van Leeuwen invest in?

Alex van Leeuwen invests primarily in Database, Software and Open Source startups, most often at Seed and Pre-Seed stage. Most of the 3 investments tracked by Shizune back companies in The Netherlands. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Alex van Leeuwen?

Public channels for Alex van Leeuwen 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 Alex van Leeuwen last invest?

The most recent investment recorded for Alex van Leeuwen closed in Aug 2020. 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.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co