Rockstart
VC Fund
Amsterdam, The Netherlands
Rockstart is an early-stage, hands-on impact investor that empowers purpose-driven founders to drive positive change across three domains: Energy, AgriFood, and Emerging Technologies. We invest early-stage, providing not just capital but also access to markets, expertise, and community by connecting founders with co-investors, mentors, partners,and corporates.Rockstart has invested in more than 350 startups and its alumni value to date is more than $1.7bn. Rockstart is an international team of 40+ professionals dedicated to empowering purpose-driven founders to become scalable and drive positive change on a global scale. Rockstart has notable exits such as Wercker, Bouw7, iClinic, and in 2021, 3D Hubs and Brincr. The company has offices in Amsterdam, The Netherlands, Copenhagen, Denmark and Bogota, Colombia.
- Total investments:
- 228
- Last investment:
- Lead investor:
- 22%
- Fund size:
- $53M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries Rockstart invests in
Stages Rockstart invests in
Countries Rockstart invests in
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
AR Horstbronk
|
|||
Don Ritzen
|
|||
Jonathan Wisler
|
|||
Mark Durno
|
Investment Focus
Industry
- Software 40 (18%)
- Artificial Intelligence 24 (11%)
- Health Care 21 (9%)
- SaaS 18 (8%)
- Food and Beverage 16 (7%)
Stage
- Seed 106 (46%)
- Pre-Seed 50 (22%)
- Convertible Note 19 (8%)
- Funding Round 7 (3%)
- Series A 4 (2%)
Country
- The Netherlands 70 (31%)
- Denmark 15 (7%)
- Colombia 9 (4%)
- Germany 6 (3%)
- United States 6 (3%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
|
AR Horstbronk
Mentor Rockstart Web and Mobile Accelerator
|
Mentor Rockstart Web and Mobile Accelerator | Total investments: 0 | Find email | |
Bor Boer
Mentor Agrifood
|
Mentor Agrifood | Total investments: 0 | Find email | |
|
Don Ritzen
Interim Managing Partner Energy Fund
|
Interim Managing Partner Energy Fund | Total investments: 1 | Find email | |
|
Jonathan Wisler
Business Mentor
|
Business Mentor | Total investments: 0 | Find email | |
|
Mark Durno
Managing Partner AgriFood
|
Managing Partner AgriFood | Total investments: 24 | Find email | |
| See all 8 team members → | ||||
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Decameal
|
Decameal envisions future food systems that are stable and sustainable, as well as healthy marine habitats. | Seed / Apr 21, 2026 | |
EtOH Spirits
|
EtOH Spirits is an operator of ultrasonic reactor technology that accelerate engineer flavor development in spirits and beverages. | Venture - Series Unknown / Apr 13, 2026 | |
Level Nine
|
Level Nine specializes in bio-nanotechnology and quantum chemistry, developing next-generation catalysts known as nanozymes. | $4.6M / Seed / Mar 17, 2026 | |
Another Earth
|
Another Earth is building an AI-powered simulation and synthetic data platform for Earth Observation. As our planet changes, AI models need scalable, high-quality training data to keep pace. Another Earth provides synthetic data, scenario simulations and predictions required to accelerate AI development, and enable faster, smarterdecision-making—enabling smarter decisions for a more resilient world. | $4M / Seed / Mar 11, 2026 | |
Ora Biotics
|
Ora Biotics is the next generation precision prebiotic that is fit for Beverages, Foods and Supplements. | Pre-Seed / Jan 29, 2026 | |
SenseUp Biotechnology
|
SenseUp is a biotech company that develops microbial production-strains. It offers de-novo construction or optimization of existing strains, using state of the art genomics, transcriptomics, and metabolomics, accompanied by our unique biosensor-technology. It was founded in 2015 and is headquartered in Jülich, North Rhine-Westphalia. | $3.5M / Seed / Jan 15, 2026 | |
Root Sustainability
|
Root Sustainability offers a software-based platform designed to support companies on their journey towards achieving net-zero emissions. By providing data-driven insights into environmental footprints, Root Sustainability enables businesses to optimize their sustainability efforts. The platform facilitates the easy and effective transition ofcompanies towards sustainability by gathering data from existing management systems through an intuitive onboarding process. Root Sustainability introduces a fully automated environmental reduction software solution aimed at reducing a company's environmental footprint and achieving net-zero status. The company focuses on making the sustainability transition seamless for product companies, emphasizing the management of environmental impact. | $1.2M / Seed / Dec 16, 2025 | |
Tractor Junction
|
Tractor Junction is an online digital platform to buy, sell, finance, insurance, service, new/used tractor and farm implements. So here at one platform, we have the entire farm-related products in one place for your comfort. Along with this, get each agricultural product at a fair price.Traction Junction was established in 2016 by RajatGupta in Alwar, Rajasthan. | $17M / Series A / Nov 18, 2025 | |
Geobirds
|
Powered by A.I. we are creating the first comprehensive supply chain map.The complex and invisible network of a compounded supply chain in a given territory will be made visible, showing all shipping locations (warehouses, production sites) and their respective shipping behaviour (tradelanes, modalities). Which in turn will unlock our collectiveability to decrease carbon emission and lowering costs by optimizing this network, whilst accelerating growth for industry players. | Pre-Seed / Nov 17, 2025 | |
Contribe.io
|
Contribe is on a mission to empower a sustainable future through innovative tech - simplifying, transparently tracking, and automating actions for a healthier planet. We turn sustainable collaborations into a competitive advantage!At Contribe we are creating a SaaS platform to automate manual work, find the right impact partner, validate results,link actions to business processes and use it all to gain competitive advantages. We are helping parties connect and collaborate, communicate their efforts with supreme accuracy and free time to focus on creating value within their core business, instead of focusing on tiresome and obsolete administrative practices.New EU-legislation is pressuring the way we handle sustainability data today, 9/10 customers demand higher transparency in sustainability claims and corporate sustainability collaborations are on a rise! With the Contribe software, we are going to totally redefine the way sustainability collaborations are managed and communicated! | $497.3K / Pre-Seed / Nov 04, 2025 | |
| See all 228 investments → | |||
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FAQ
What does Rockstart invest in?
Rockstart invests primarily in Software, Artificial Intelligence and Health Care startups, most often at Seed and Pre-Seed stage. Most of the 228 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 Rockstart?
Public channels for Rockstart 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.
Who are the partners at Rockstart?
The team at Rockstart includes AR Horstbronk (Mentor Rockstart Web and Mobile Accelerator), Bor Boer (Mentor Agrifood) and Don Ritzen (Interim Managing Partner Energy Fund), among 8 team members tracked by Shizune. The Team section lists each member with their title, investment count and links.
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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