# Bob van Luijt

> Bob van Luijt is a seed investor at Weaviate backing Software and Artificial Intelligence. See 29 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Weaviate](https://shizune.co/investors/profile/weaviate)
- Location: Amsterdam, The Netherlands
- Total investments: 29
- Last investment: May 2026
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/bobvanluijt
- X (Twitter): https://twitter.com/bobvanluijt
- Website: https://weaviate.io

Bob van Luijt is a seed investor at Weaviate in Amsterdam focused on Software and Artificial Intelligence. Bob van Luijt is the founder of Weaviate and an angle investor.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $3M–$23M |
| Pre-Seed | $500k–$3.2M |
| Series A | $16M–$25M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 15 | 52% |
| Artificial Intelligence | 13 | 45% |
| Machine Learning | 6 | 21% |
| Generative AI | 4 | 14% |
| Developer APIs | 4 | 14% |

38 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 12 | 41% |
| Pre-Seed | 9 | 31% |
| Series A | 4 | 14% |
| Angel | 2 | 7% |
| Funding Round | 1 | 3% |

6 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 16 | 55% |
| Germany | 3 | 10% |
| The Netherlands | 1 | 3% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| StackAI | Stack is developing a set of tools to assist machine learning teams in perfecting their datasets by detecting data anomalies, evaluating annotations at scale, and protecting data with version control. | $16M | Series A | May 06, 2026 |  |
| Polars | Polars is a rust based dataframe framework for data scientists and engineers that enables data processing at any scale. | $21.1M | Series A | Sep 29, 2025 |  |
| P-1 AI | P-1 AI is a technology company focused on developing an artificial general engineering intelligence (AGEI) designed to help humanity design physical systems with far greater efficiency and complexity than currently possible. | $23M | Seed | Apr 28, 2025 |  |
| FlyMy.AI | Real-time AI cloud |  |  | Apr 01, 2025 |  |
| Cartesia | Cartesia provides real-time multimodal intelligence for all devices. Its objective is to develop the next generation of AI: pervasive, interactive intelligence that operates everywhere. | $22M | Series A | Dec 12, 2024 |  |
| Cartesia | Cartesia provides real-time multimodal intelligence for all devices. Its objective is to develop the next generation of AI: pervasive, interactive intelligence that operates everywhere. | $27M | Seed | Dec 12, 2024 |  |
| FlyMy.AI | Real-time AI cloud |  | Pre-Seed | Dec 01, 2024 |  |
| cognee inc | cognee helps you create a GraphRAG and supports Vector Stores, Graph stores, and various LLM providers | $1.6M | Pre-Seed | Nov 20, 2024 |  |
| Dash Bio | Dash Bio is a modern automated platform. It is redesigning drug development from the ground up, using AI, robotics, and fully integrated software to fundamentally change the way medications are brought to market. | $6.5M | Seed | Oct 16, 2024 |  |
| Trace Machina | Trace Machina is a company that specializes in the development and maintenance of simulation infrastructure, it is an open source software company that focuses on developing advanced technologies like AI, robotics, and autonomous mobility to reduce simulation costs for safety-critical systems. | $4.7M | Seed | Aug 23, 2024 |  |

10 of 29 investments shown.

## Co-investors
- [Y Combinator](https://shizune.co/investors/profile/y-combinator) — VC Fund, 6 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 5 deals together
- [Lightspeed Venture Partners](https://shizune.co/investors/profile/lightspeed-venture-partners) — VC Fund, 4 deals together
- [Epakon Capital](https://shizune.co/investors/profile/epakon-capital) — VC Fund, 3 deals together
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund, 3 deals together
- [Gradient](https://shizune.co/investors/profile/gradient-ventures) — VC Fund, 3 deals together

## About Weaviate

VC Fund · Amsterdam, The Netherlands

Weaviate offers products in the form of the Weaviate Cloud Service to a wide variety of industries. Previously known as SeMI technologies.

2 contacts available at Weaviate.

| Name | Title | Profile |
| --- | --- | --- |
| Bob van Luijt | CEO, co-founder | https://shizune.co/investors/profile/bob-van-luijt-cfb7 |
| Etienne Dilocker | CTO, co-founder | https://shizune.co/investors/profile/etienne-dilocker |

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## FAQ

### What does Bob van Luijt invest in?

Bob van Luijt invests primarily in Software, Artificial Intelligence and Machine Learning startups, most often at Seed and Pre-Seed stage. Most of the 29 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 Bob van Luijt's check size?

Bob van Luijt typically joins rounds of $3M–$23M at Seed, $500k–$3.2M at Pre-Seed and $16M–$25M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Bob van Luijt participates in.

### When did Bob van Luijt last invest?

The most recent investment recorded for Bob van Luijt closed in May 2026. Shizune tracks 29 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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