System.One
VC Fund
Kreuzberg, Germany
System.One is a pre-seed venture capital fund. They are based in Berlin, but have a global mindset and reach. Their purpose is to invest in exceptional founders who combine early technical ideas with a bold mission and major potential impact. Pre-seed simply means They like to get in first – product and tech risk are core to what they do, not aproblem they seek to eliminate.
- Total investments:
- 30
- Last investment:
- Lead investor:
- 17%
- Fund size:
- $8.4M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries System.One invests in
Stages System.One invests in
Countries System.One invests in
Round sizes
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
4 more contacts available
Round size
- Seed
- $1.5M–$13M
- Pre-Seed
- $855k–$4M
- Series A
- $12M–$18M
Investment Focus
Industry
- Software 9 (30%)
- Artificial Intelligence 8 (27%)
- SaaS 5 (17%)
- Machine Learning 4 (13%)
- Information Technology 4 (13%)
Stage
- Seed 14 (47%)
- Pre-Seed 9 (30%)
- Series A 2 (7%)
- Funding Round 2 (7%)
- Series B 1 (3%)
Country
- Germany 11 (37%)
- United States 5 (17%)
- United Kingdom 4 (13%)
- Finland 1 (3%)
- The Netherlands 1 (3%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Maximilan Claussen
Founder and Partner
|
Founder and Partner | Total investments: 8 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Silixon
|
siliXon is an AI-powered PCB design tool that lets engineers create printed circuit boards using natural language—type what you want in plain English, and get a manufacturable PCB in minutes instead of months. | $1.5M / Pre-Seed / May 21, 2026 | |
Mondoo
|
Mondoo identifies, prioritizes, and addresses risks in your entire IT infrastructure from a single interface - covering on-prem, cloud, SaaS, and endpoints. Unlike siloed approaches, Mondoo enables you to quickly understand your most critical risks and initiate fast remediation, optimizing security efforts and boosting security posture. | $17.5M / Series A / Sep 30, 2025 | |
lemon.markets
|
lemon.markets provide a REST API to support creating and executing orders at the stock market and retrieving market data. | $13M / Seed / Jul 11, 2024 | |
Mixedbread
|
Self improving AI platform for information retrieval & discovery | $855K / Pre-Seed / Jan 23, 2024 | |
Deta
|
Deta provides developer API and cloud storage services. | $3.6M / Seed / Oct 10, 2023 | |
Martian Lawyers Club
|
Martian Lawyers Club takes game personalization to the next level with the help pf generative AI. | $2.2M / Pre-Seed / Aug 31, 2023 | |
deepset
|
deepset builds the technology enterprises rely on to create custom, production-ready AI applications. We are the company behind Haystack, the leading open-source AI orchestration framework, and the deepset AI Platform for building mission-critical AI agents and applications. Since 2018, we’ve helped organizations such as Siemens, Airbus, TheEconomist, and the German Armed Forces bring the latest in large language models and NLP into real-world use, delivering proven open-source technology and enterprise-grade solutions adopted by thousands of AI teams worldwide. | $29.6M / Series B / Aug 09, 2023 | |
Levity
|
Levity is a software company that provides a no-code AI workflow automation platform. It enables non-technical people to build AI-powered workflow automation without code. The platform provides its users with AI blocks, which provide a modular set of capabilities that can be used to build out an application workflow. Levity combines naturallanguage processing (NLP) and computer vision in a single platform to automate many processes, including signing up, creating an AI Block, and receiving the first predictions in as little as five minutes.It was founded in 2020 and is based in Berlin, Germany. | $8.3M / Seed / Oct 12, 2022 | |
Flipt
|
Flipt is an open source feature flag solution provider. It enables developers to use the on and off flags to toggle functionality in the application. It allows users to develop flags that represent the features in the applications. It includes audit logs, user management, and role based access control. | Pre-Seed / Sep 01, 2022 | |
Twain
|
Twain is the world’s most accurate deep research for GTM Agents and B2B outreach. It replaces generic templates with real-time research to generate unique 1:1 multi-channel sequences that scale. By identifying and verifying signals like job changes and company news in real-time, Twain ensures outreach is never based on outdated or hallucinateddata.Unlike general LLMs, Twain utilizes a proprietary multi-agent safety net to ensure 100% factual accuracy. Twain provides detailed proof and citations for every research point discovered. This allows revenue teams to scale personalized communication while protecting brand reputation and ensuring high deliverability. Twain provides two APIs: one to generate research-backed 1:1 outreach for inbound and outbound workflows and another one to enable sales teams with real-time deep research on account and lead level Twain was founded in 2021 by Mohamed Chahin and is backed by Sequoia Capital, TQ Ventures, and System.One. Twain was founded in 2021 and is backed by Sequoia Capital, TQ Ventures, and System.One. | $4M / Pre-Seed / May 23, 2022 | |
| See all 30 investments → | |||
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FAQ
What does System.One invest in?
System.One invests primarily in Software, Artificial Intelligence and SaaS startups, most often at Seed and Pre-Seed stage. Most of the 30 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is System.One's check size?
System.One typically joins rounds of $1.5M–$13M at Seed, $855k–$4M at Pre-Seed and $12M–$18M 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 System.One participates in.
How do I contact System.One?
Public channels for System.One 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 System.One?
The team at System.One includes Maximilan Claussen (Founder and Partner). 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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