# Saarbruecker 21

> Saarbruecker 21 is a VC fund in Berlin backing Software and Internet. See 82 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Berlin, Germany
- Total investments: 82
- Last investment: Feb 2025
- Lead investor: 18%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/sb21-de/
- X (Twitter): https://twitter.com/SB21Berlin
- Website: https://www.sb21.de/

Saarbruecker 21 is a VC fund in Berlin focused on Software and Internet. They are a group of friends and internet/tech entrepreneurs who first met ten years ago in Saarbruecker Strasse 21 in Berlin Prenzlauer Berg. All of them started successful businesses, they are founders and share a passion for building great companies. As active business angels, they also invest in young startups, either individually orcollectively as a group. They provide seed funding for killer-founders and great ideas. But way more important: they help to avoid mistakes that they have already made . They introduce to the right people. They provide with all the experience that they have. Not just talking about it but helping hands-on.

## Contacts

5 contacts available for Saarbruecker 21. Shizune tracks 3 team members at Saarbruecker 21. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/saarbruecker-21?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $214k–$6.4M |
| Pre-Seed | $542k–$1.6M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 18 | 22% |
| Internet | 14 | 17% |
| E-Commerce | 14 | 17% |
| SaaS | 11 | 13% |
| Health Care | 11 | 13% |

125 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 66 | 80% |
| Pre-Seed | 4 | 5% |
| Angel | 2 | 2% |
| Series A | 2 | 2% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Germany | 68 | 83% |
| United States | 2 | 2% |
| Israel | 1 | 1% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Robert Maier | Business Angel | 18 | https://shizune.co/investors/profile/robert-maier |
| Eric Ebert | Angel Investor | 0 | https://shizune.co/investors/profile/eric-ebert-0e11 |
| Martin Rost | Business Angel Investor | 2 | https://shizune.co/investors/profile/martin-rost |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Floy | Floy develops AI-driven software that supports radiologists in detecting complex and hard-to-identify diseases. The collaboration of Floy-AI and radiologists ensures optimal patient outcomes by enabling the early detection and thus early treatment of diseases.One of Floy’s distinguishing features is our innovative incentive structure. We partnerwith radiology offices to jointly offer patients our AI as a “second opinion”. This unique approach motivates radiologists to embrace Floy-AI and encourages widespread adoption.Since its establishment in 2021, Floy secured €8.8 million in funding and rapidly expanded its presence with over 150 radiology locations to date. Floy’s overarching mission is to pioneer proactive medicine by providing exceptional AI-powered diagnostic experiences for health-conscious patients. | $3.8M | Seed | Feb 14, 2025 |  |
| Meine Erde | Meine Erde is a provider of ecological burial option in Europe. |  | Seed | Nov 12, 2024 |  |
| a2zebra | a2zebra is a zebra company that specializes in instructional technology for elementary school kids. | $541.9K | Pre-Seed | Apr 03, 2024 |  |
| Floy | Floy develops AI-driven software that supports radiologists in detecting complex and hard-to-identify diseases. The collaboration of Floy-AI and radiologists ensures optimal patient outcomes by enabling the early detection and thus early treatment of diseases.One of Floy’s distinguishing features is our innovative incentive structure. We partnerwith radiology offices to jointly offer patients our AI as a “second opinion”. This unique approach motivates radiologists to embrace Floy-AI and encourages widespread adoption.Since its establishment in 2021, Floy secured €8.8 million in funding and rapidly expanded its presence with over 150 radiology locations to date. Floy’s overarching mission is to pioneer proactive medicine by providing exceptional AI-powered diagnostic experiences for health-conscious patients. | $5.9M | Seed | Nov 16, 2023 |  |
| Seqstant | Seqstant offers the LiveGene platform for real-time pathogen analysis, allowing for sensitive, specific, and user-friendly real-time genetic diagnostics. | $1.9M | Seed | Nov 05, 2023 |  |
| Entrix | Entrix is an optimisation and trading platform for grid-scale battery storage that accelerates the transition towards a clean energy future. Our mission is to enable the most effective use of green energy and to ensure the reliability of the future energy system. We provide state-of-the-art technology and services to both asset owners and potentialinvestors across the globe. | $6.4M | Seed | Sep 06, 2023 |  |
| Entrix | Entrix is an optimisation and trading platform for grid-scale battery storage that accelerates the transition towards a clean energy future. Our mission is to enable the most effective use of green energy and to ensure the reliability of the future energy system. We provide state-of-the-art technology and services to both asset owners and potentialinvestors across the globe. | $6.4M | Seed | Sep 06, 2023 |  |
| Entrix | Entrix is an optimisation and trading platform for grid-scale battery storage that accelerates the transition towards a clean energy future. Our mission is to enable the most effective use of green energy and to ensure the reliability of the future energy system. We provide state-of-the-art technology and services to both asset owners and potentialinvestors across the globe. | $6.4M | Seed | Sep 06, 2023 |  |
| SECJUR | SECJUR provides a platform for automated compliance. The startup's technology streamlines procedures in the Digital Compliance Office for areas including data protection, information security, anti-money laundering, and whistleblowing. | $5.8M | Seed | Dec 01, 2022 |  |
| SECJUR | SECJUR provides a platform for automated compliance. The startup's technology streamlines procedures in the Digital Compliance Office for areas including data protection, information security, anti-money laundering, and whistleblowing. | $5.8M | Seed | Dec 01, 2022 |  |

10 of 82 investments shown.

## Co-investors
- [Visionaries Club](https://shizune.co/investors/profile/visionaries-club) — VC Fund, 8 deals together
- [Cherry Ventures](https://shizune.co/investors/profile/cherry-ventures) — VC Fund, 6 deals together
- [Axel Springer Plug and Play Accelerator](https://shizune.co/investors/profile/axel-springer-plug-and-play-accelerator) — VC Fund, 4 deals together
- [Bloomhaus Ventures](https://shizune.co/investors/profile/bloomhaus-ventures) — VC Fund, 4 deals together
- [NAP](https://shizune.co/investors/profile/cavalry-ventures) — VC Fund, 4 deals together
- [Cocoa](https://shizune.co/investors/profile/cocoa-ventures) — VC Fund, 4 deals together

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## FAQ

### What does Saarbruecker 21 invest in?

Saarbruecker 21 invests primarily in Software, Internet and E-Commerce startups, most often at Seed and Pre-Seed stage. Most of the 82 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Saarbruecker 21's check size?

Saarbruecker 21 typically joins rounds of $214k–$6.4M at Seed and $542k–$1.6M at Pre-Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Saarbruecker 21 participates in.

### How do I contact Saarbruecker 21?

Public channels for Saarbruecker 21 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 Saarbruecker 21?

The team at Saarbruecker 21 includes Robert Maier (Business Angel), Eric Ebert (Angel Investor) and Martin Rost (Business Angel Investor). 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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