Dr. Dennis Zeiler

Pre-Seed + Seed VC Investor | xdeck | WHU

📍 Germany🔄 Updated September 2026💼 15 investments📅 5 years investing🗓 Last invested May 2025
Angel investor🌍 Germany
15
Total investments
9
Early stage
1
Mid stage
0
Late stage
5y
Years active

Portfolio

15 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Pre-Seed Investor (private Angel Investment)
May 2025
Wir sind BonFry – ein Unternehmen, das Gastronomie, Hotellerie und Lebensmittelproduktion dabei unterstützt, nachhaltig zu handeln. Höchste Qualität, operative Effizienz und digitale Transparenz definieren das Ölmanagement der Zukunft. Gemeinsam mit unseren Partnern verfolgen wir das Prinzip der Kreislaufwirtschaft für Frittieröle und verwerten diese zu nachhaltigen Kraftstoffen weiter.
Pre-Seed Investor (Private Angel Investment)
Mar 2025
We’re building the first plant-based ingredient platform that makes sodium reduction work at scale—without sacrificing taste, cost, or clean label. Backed by proprietary process + formulation IP, we help food makers reformulate everyday products that people actually buy. Powered by circular, blue-economy sourcing, we reduce waste and CO₂ and create inclusive livelihoods across coastal value chains.
Pre-Seed Investor (VC)
Jan 2025
LawX ist das Betriebssystem der nächsten Generation für Notariate und Kanzleien. Von der Anlage bis zur Abrechnung vereint LawX alle Arbeitsschritte in einem intelligenten, KI-gestützten System. Das Ergebnis: schnelleres, produktiveres Arbeiten mit mehr Effizienz und weniger Aufwand. LawX ist intuitiv aufgebaut, sofort verständlich und vom ersten Tag mit den eigenen Büro-Vorlagen nutzbar – ganz ohne lange Schulungen oder komplexes Programmieren. KI-basierte Automatisierung übernimmt Routineaufgaben präzise und verlässlich. So wächst das Büro weiter, auch wenn Fachkräfte knapp sind. Mit LawX behalten Teams jederzeit den Überblick, arbeiten reibungslos zusammen und sichern Qualität und Exzellenz in jedem Schritt.
Pre-Seed Investor (VC)
Dec 2024
How to empower operators and technicians at scale, and reduce time-to-problem-solve? We live in a manufactured world. Everything we see around us, has been manufactured. To improve the state of our world, we need to empower technicians, and transform physical operations. Augmented Industries offers an enterprise-grade, AI-enabled technician excellence software that helps manufacturers and machine builders to achieve their goals with knowledge management, execution guidance, and training in the flow of work. Need to solve your knowledge-to-action-gap in minutes? - Lets talk.
Pre-Seed Investor (VC)
Mar 2024
The Customer Success Management tool that aims to maximize customer retention and profitability by bringing the customer back to the center of attention. We help B2B SaaS businesses to stop focusing on hunting the prospect and starting to optimize the existing relationships that they have and increase their CLV.
Pre-Seed Investor (VC)
Feb 2024
Narratic automates lead research for ambitious B2B sales teams. Our AI-first data platform supplies users with tailored information along the whole sales cycle, enabing people to focus on the right targets with the right messaging. We are an experienced team of Engineers, Physicists and successful B2B growth leaders. Our mission is to support Sales and RevOps leaders grow their companies without hiring armies to perform manual labor.
Pre-Seed Investor (Angel)
Aug 2023
WOMENS GAME builds a digital media platform, aimed at womens football only, reaching millions of fans worldwide every month. We help, young, aspiring female ballers find content that does the women’s game justice so that they feel inspired and proud of the game they love. Unlike the wider category which prioritizes the men’s game and ‘bolts on’ women’s coverage we are the only source of in-depth and quality content with a singular focus on women’s football.
Seed Investor (VC)
Mar 2023
Packmatic is the leading digital purchasing platform for customized packaging in Europe and brings more transparency and efficiency to the 160 billion packaging market. More than 300 customers (leading FMCG, industrial and e-commerce companies) use Packmatic to achieve savings potentials of 16% on average and to optimize their packaging according to current sustainability standards. Among the customers are well-known brand manufacturers as well as international retailers - including Zalando, YFOOD, CoffeeCircle, Lebensbaum, Pickerd, EGLO, Asphaltgold, and many more. With more than 350 affiliated packaging suppliers, Packmatic has access to the largest supplier network in Europe and can access suppliers machinery within a few clicks using its proprietary Smart Matching technology. In addition to cost pressure, our customers are increasingly faced with the challenge of meeting stricter requirements in terms of recyclability, supply chain transparency and CO2 reduction. Packmatic provides support here thanks to smart features and deep sustainability expertise, ensuring their customers’ continued success in the future. Learn more by filling out the form on this page, or by contacting us directly: info@packmatic.io www.packmatic.io
Pre-Seed Investor (Angel)
Nov 2022
Wir bei Vamo haben es uns zur Mission gemacht grünes, günstiges Heizen mit Wärmepumpen unkompliziert und für jedermann möglich sowie bezahlbar zu machen. Unser Team aus kompetenten Installateuren und Elektrikern kümmert sich dabei um alles rund um die Installation einer Wärmepumpe. Von der Antragstellung der KfW-Förderung über den Einbau bis zur Wartung - wir bieten unseren Kunden ein Rundum-sorglos-Paket für den Heizungswechsel. Deutschlandweit ohne Aufpreis!
Seed Investor (VC)
Aug 2022
plancraft ermöglicht Handwerker:innen sich auf das zu konzentrieren, was sie lieben. Das Handwerk! Unsere extrem intuitive SaaS-Lösung macht Büroarbeit und Teamwork maximal effizient. Von der Angebotserstellung über die Projektplanung bis zur Arbeitszeiterfassung - grundlegende Prozesse werden digitalisiert und für eine chronisch überlastete Zielgruppe simplifiziert. Plancraft vereint erstmals die Flexibilität der Cloud mit der Spezifität von Branchensoftware, wodurch ein neuer Standard gesetzt wird. Jetzt kostenlos testen! Als Team haben wir folgende Werte für uns identifiziert. Bock: Wir haben einfach richtig Bock! Unsere Vision vom digitalen Handwerk zündet das Feuer in uns, und wir lieben den Spaß, den wir auf der Reise haben. Zusammenhalt: Zusammenhalt und Teamspirit ist keine in Worte geschriebene Definition, sondern eine Einstellung, die wir alle teilen. Bodenständigkeit: No bullshit. Einfach 100% wir, authentisch und stets auf Augenhöhe.
Pre-Seed Investor (VC)
Feb 2022
We empower sustainability & compliance teams to make their work more productive and impactful. 💫 With Sunhat, experts generate context-based and audit-proof content with AI — for ratings, certification and non-financial reporting. Sunhat eliminates the hassle of manually collecting, reviewing and maintaining sustainability evidence, so you can focus on your most impactful tasks. Our Sunhat experts help you to get up and running and guide you on throughout your journey.
Pre-Seed Investor (VC)
Jan 2022
Kertos is an AI-powered compliance automation platform designed to help businesses streamline and simplify compliance management. By replacing manual processes, spreadsheets, and costly consultants, Kertos enables organizations to stay ahead of growing regulatory demands with speed, accuracy, and efficiency. Our solution adapts to your unique risk profile, ensuring compliance becomes an enabler of growth—not a barrier. With Kertos, businesses can reduce costs, mitigate risks, and future-proof their compliance efforts in an ever-evolving landscape.
Pre-Seed Investor (VC)
Sep 2021
B2B Software as a Service (SaaS) startup that enables digital planning and calculation data to be effectively used on the physical construction site, captures (automatically) construction progress, and learns from the collected data to optimize processes.
Pre-Seed Investor (VC)
Jul 2021
Floy supports radiologists in seeing diseases that are difficult to detect. Radiologists receive a financial profit for every patient for whom they employ Floy-AI. Founded in 2021, Floy already raised €3.4m in funding and closed over 100 radiology locations.
Pre-Seed Investor (Angel)
Feb 2021
Our mission is to enable teams to discover and work with all the tools they need without friction.
Experience · 16 entries
All (16)
Investments (15)
2025
Pre-Seed Investor (private Angel Investment)
May 2025
Wir sind BonFry – ein Unternehmen, das Gastronomie, Hotellerie und Lebensmittelproduktion dabei unterstützt, nachhaltig zu handeln. Höchste Qualität, operative Effizienz und digitale Transparenz definieren das Ölmanagement der Zukunft. Gemeinsam mit unseren Partnern verfolgen wir das Prinzip der Kreislaufwirtschaft für Frittieröle und verwerten diese zu nachhaltigen Kraftstoffen weiter.
Pre-Seed Investor (Private Angel Investment)
Mar 2025
We’re building the first plant-based ingredient platform that makes sodium reduction work at scale—without sacrificing taste, cost, or clean label. Backed by proprietary process + formulation IP, we help food makers reformulate everyday products that people actually buy. Powered by circular, blue-economy sourcing, we reduce waste and CO₂ and create inclusive livelihoods across coastal value chains.
Pre-Seed Investor (VC)
Jan 2025
LawX ist das Betriebssystem der nächsten Generation für Notariate und Kanzleien. Von der Anlage bis zur Abrechnung vereint LawX alle Arbeitsschritte in einem intelligenten, KI-gestützten System. Das Ergebnis: schnelleres, produktiveres Arbeiten mit mehr Effizienz und weniger Aufwand. LawX ist intuitiv aufgebaut, sofort verständlich und vom ersten Tag mit den eigenen Büro-Vorlagen nutzbar – ganz ohne lange Schulungen oder komplexes Programmieren. KI-basierte Automatisierung übernimmt Routineaufgaben präzise und verlässlich. So wächst das Büro weiter, auch wenn Fachkräfte knapp sind. Mit LawX behalten Teams jederzeit den Überblick, arbeiten reibungslos zusammen und sichern Qualität und Exzellenz in jedem Schritt.
2024
Pre-Seed Investor (VC)
Dec 2024
How to empower operators and technicians at scale, and reduce time-to-problem-solve? We live in a manufactured world. Everything we see around us, has been manufactured. To improve the state of our world, we need to empower technicians, and transform physical operations. Augmented Industries offers an enterprise-grade, AI-enabled technician excellence software that helps manufacturers and machine builders to achieve their goals with knowledge management, execution guidance, and training in the flow of work. Need to solve your knowledge-to-action-gap in minutes? - Lets talk.
Pre-Seed Investor (VC)
Mar 2024
The Customer Success Management tool that aims to maximize customer retention and profitability by bringing the customer back to the center of attention. We help B2B SaaS businesses to stop focusing on hunting the prospect and starting to optimize the existing relationships that they have and increase their CLV.
Show all 16 entries ↓
Investment activity
2021–2025 · 15 investments
2021320224202322024320253
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