Sebastian Ribbentrop
Managing Partner @ Join Capital
London, United Kingdom
Sebastian Ribbentrop is a seed investor at Join Capital in London focused on Software and Artificial Intelligence. Sebastian Ribbentrop has over 22 years of experience in private equity, real estate and venture capital. He founded WunderHouse in 2015 a specialist investor and operator in the hospitality sector providing flexible community-enhancing co-living opportunities for young professionals and students. Most recently he was the Director of platforms NidoStudent Housing and DB Deutschland Property Partners. Nido Student Housing Ltd was the largest student residential direct-let platform in London. Previously, Sebastian spent 11 years in Private Equity in London and Frankfurt. His last position was Managing Director of West LB’s €3bn venture capital & private equity practice in London where he chaired the Investment Committee for global direct and indirect investments. Prior to his position at WestLB, he focused on private equity & venture capital in Europe and was a principal at Steadfast Capital from 2001 to 2007 and Schroders from 1995 to 2001.
- Total investments:
- 9
- Last investment:
- Lead investor:
- 67%
Last updated:
For AI agents: llms.txt
Industries Sebastian Ribbentrop invests in
Stages Sebastian Ribbentrop invests in
Countries Sebastian Ribbentrop invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
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Investment Focus
Industry
- Software 3 (33%)
- Artificial Intelligence 3 (33%)
- Telecommunications 2 (22%)
- Electronics 1 (11%)
- Procurement 1 (11%)
Stage
- Seed 3 (33%)
- Series A 2 (22%)
- Pre-Seed 1 (11%)
- Funding Round 1 (11%)
Country
- United Kingdom 4 (44%)
- Switzerland 1 (11%)
- The Netherlands 1 (11%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Astrape powers the future of datacenters: more bandwidth, less power. | $6.2M / Seed / Apr 29, 2025 | ||
| CamGraPhIC designs, develops, and manufactures next-generation photonic circuits for telecoms and datacoms. | $27M / Series A / Mar 24, 2025 | ||
| Generative Engineering is a deep-tech startup with a unique platform that generates, tests, and simulates thousands of different engineering designs, all within a fraction of the time these processes take today. This parallel engineering will radically decrease product development time, enabling innovative designs for all real-world products. | $4.4M / Pre-Seed / Nov 22, 2023 | ||
| Opteran reverse-engineers biological brains to create neuromorphic software for machines. Harnessing 600 million years of evolution, Opteran provides robust, low-cost autonomy on the edge. Without the need for AI, data centers, or training, the Opteran Mind provides general-purpose autonomy in the most challenging and dynamic conditions. | $13.1M / Jun 23, 2022 | ||
| Opteran reverse-engineers biological brains to create neuromorphic software for machines. Harnessing 600 million years of evolution, Opteran provides robust, low-cost autonomy on the edge. Without the need for AI, data centers, or training, the Opteran Mind provides general-purpose autonomy in the most challenging and dynamic conditions. | $12.3M / Seed / Jun 23, 2022 | ||
| Silico's Business Process Simulation Platform is enabling the Digital Twin of the Enterprise | $4.5M / Seed / Mar 03, 2022 | ||
| Opteran reverse-engineers biological brains to create neuromorphic software for machines. Harnessing 600 million years of evolution, Opteran provides robust, low-cost autonomy on the edge. Without the need for AI, data centers, or training, the Opteran Mind provides general-purpose autonomy in the most challenging and dynamic conditions. | $2.6M / Seed / Nov 24, 2020 | ||
| Opteran reverse-engineers biological brains to create neuromorphic software for machines. Harnessing 600 million years of evolution, Opteran provides robust, low-cost autonomy on the edge. Without the need for AI, data centers, or training, the Opteran Mind provides general-purpose autonomy in the most challenging and dynamic conditions. | Nov 11, 2020 | ||
| Datapred is a machine learning software for energy and raw material procurement. Datapred combines price trend predictions and operational cost/constraint optimization to let CPOs know which energy or raw material volumes to buy, and at what time - thus shaving 3-5% off energy and raw material spend, year over year. Datapred is based on apowerful modeling engine for streaming data, notably enabling the real-time combination of multiple models of multiple types - predictive, business rules, operations research, human inputs... | Series A / Apr 02, 2020 |
Co-Investors
About Join Capital
JOIN Capital is an early stage VC focused on Seed and Series A investments in Industry 4.0 and enterprise tech. Our portfolio companies are front and center at factories, delivering smart machinery and robotics for high-volume manufacturing. They’re behind the scenes with powerful algorithms for managing global production systems. They rethink andrewire essential processes, with the goal of maximizing human capabilities. We invest in technologies related to core business functions: operations, manufacturing, data analytics, supply chain and software development. We seek innovative solutions to real customer problems that have achieved product-market fit. Technologies we invest in include: machine learning, robotics, cloud computing, IoT, smart sensors.
Join Capital Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Jan Borgstaedt
Managing Partner
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Manuel Effenberg
CFO
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Philippe von Klitzing
Investment Analyst
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Sebastian Ribbentrop
Managing Partner
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Tobias Schirmer
Managing Partner
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FAQ
What does Sebastian Ribbentrop invest in?
Sebastian Ribbentrop invests primarily in Software, Artificial Intelligence and Telecommunications startups, most often at Seed and Series A stage. Most of the 9 investments tracked by Shizune back companies in United Kingdom. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Sebastian Ribbentrop?
Public channels for Sebastian Ribbentrop 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 Sebastian Ribbentrop last invest?
The most recent investment recorded for Sebastian Ribbentrop closed in Apr 2025. Shizune tracks 9 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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