# JC Heyneke

> JC Heyneke is a seed investor at Slimmer AI (Amsterdam) backing Apps and SaaS. See 5 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Slimmer AI](https://shizune.co/investors/profile/slimmer)
- Location: Amsterdam, The Netherlands
- Total investments: 5
- Last investment: Feb 2025
- Lead investor: 40%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/jc-heyneke/

JC Heyneke is a seed investor at Slimmer AI in Amsterdam focused on Apps and SaaS. JC Heyneke, CEO at Slimmer AI.

## Contacts

5 contacts available for JC Heyneke: 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/jc-heyneke?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Apps | 1 | 20% |
| SaaS | 1 | 20% |
| Dating | 1 | 20% |
| Medical | 1 | 20% |
| Analytics | 1 | 20% |

18 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 40% |
| Pre-Seed | 2 | 40% |
| Series C | 1 | 20% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| EvidenceHunt | EvidenceHunt is an AI-powered research assistant developed by medical professionals for healthcare research. Our focus is on delivering tools that streamline gathering and analyzing clinical evidence. With features like AI Chat for interactive queries and comprehensive Direct Search options, EvidenceHunt allows precise data retrieval andanalysis. It's a tool designed for healthcare experts seeking quick, reliable access to medical research and insights. | $1.3M | Seed | Feb 26, 2025 | https://evidencehunt.com |
| Breeze | Breeze is a dating app startup that develops an offline dating platform. The company was founded a year ago by a group of former TU Delft students and has been associated with the YES! Delft incubator since February. | $1.4M | Pre-Seed | Dec 02, 2022 | https://breeze.social |
| Breeze | Breeze is a dating app startup that develops an offline dating platform. The company was founded a year ago by a group of former TU Delft students and has been associated with the YES! Delft incubator since February. | $1.4M | Series C | Dec 02, 2022 | https://breeze.social |
| Hadrian | Hadrian’s digital security model focuses on automated event-based scanning. The company's approach maps vulnerabilities in an organization's entire attack surface infrastructure, and provides the critical insights to fortify them. Hadrian is developed by a team of hackers, their approach to digital security allows for continuoussecurity validation, running tests on 1000s of digital assets.Hadrian was established in 2021 by Maurice Clin and Rogier Fischer in Amsterdamnm Noord-Holland. | $2.8M | Pre-Seed | Nov 15, 2021 | https://hadrian.io/ |
| Vesper | Vesper is a dairy intelligence tool designed to grow your business. It saves users hours of time looking for information and provides all relevant insights and data in one consolidated and personalized overview. | $5.8M | Seed | Sep 30, 2021 | https://vespertool.com/ |

5 of 5 investments shown.

## Co-investors
- [FJ Labs](https://shizune.co/investors/profile/fj-labs) — VC Fund, 2 deals together
- [Hype Ventures](https://shizune.co/investors/profile/hype-ventures) — VC Fund, 2 deals together
- [DFF Ventures](https://shizune.co/investors/profile/augus-ventures) — VC Fund, 1 deal together
- [DFF Ventures](https://shizune.co/investors/profile/dutchfoundersfund) — VC Fund, 1 deal together
- [Keen Venture Partners](https://shizune.co/investors/profile/keen-venture-partners-2) — VC Fund, 1 deal together
- [Village Global](https://shizune.co/investors/profile/village-global-2) — VC Fund, 1 deal together

## About Slimmer AI

VC Fund · Groningen, The Netherlands

Slimmer AI is an AI venture studio. They help with strategy, software and commercial delivery, people, and infrastructure. They build artificial intelligence products and strategies. They help to build a minimum viable AI product, define customer AI strategy and product roadmaps, refine customer go-to-market strategies, and land launch customers.

1 contacts available at Slimmer AI.

| Name | Title | Profile |
| --- | --- | --- |
| JC Heyneke | Chief Executive Officer | https://shizune.co/investors/profile/jc-heyneke |

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## FAQ

### What does JC Heyneke invest in?

JC Heyneke invests primarily in Apps, SaaS and Dating startups, most often at Seed and Pre-Seed stage. Most of the 5 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 JC Heyneke?

Public channels for JC Heyneke include LinkedIn. 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 JC Heyneke last invest?

The most recent investment recorded for JC Heyneke closed in Feb 2025. Shizune tracks 5 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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