Julien Dassault

Président Fondateur de DASTERIA | Investisseur de Convictions | Administrateur de Sociétés | Photographe • Musicien

📍 Lisboa, Lisbon, Portugal🔄 Updated September 2026💼 11 investments📅 7 years investing🗓 Last invested Dec 2025
Operator-angel🌍 PortugalInvested this year
11
Total investments
6
Early stage
3
Mid stage
1
Late stage
7y
Years active

Portfolio

11 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor and Board Member
Dec 2025
HyprView addresses the critical limits of current predictive biomarkers in oncology, where relying solely on genes and proteins fails to accurately match patients to precision therapies. The core innovation is a proprietary and patented imaging platform combining advanced photonics and AI to achieve unmatched data quality for a better patient stratification. From raw biopsies, we capture massive amount of information and apply deep learning to this unique data set to build comprehensive biomarker signatures for predicting therapy response.
Investisseur
Apr 2023
on.suzane est la première plateforme SVOD collaborative spécialisée sur les sujets féminins et féministes. on.suzane diffuse et produit des contenus (documentaires/fictions/émissions) qui ont vocation à provoquer une prise de conscience personnelle et 
un changement sociétal. À travers ses 4 thématiques (la maternité, le corps, la condition féminine, portraits inspirants), on.suzane aide les femmes à sinformer sur les sujets qui les concernent, afin quelles puissent sapproprier leur vie. Les abonnées ont un accès illimité aux films mais également à la communauté on.suzane à travers son outil collaboratif intégré à la plateforme. Elles sont invitées à échanger, collaborer, se rencontrer 
afin de créer des réseaux d’entraide féminins.
Investisseur et Membre du Conseil
Dec 2022
Investissez dans des biens rares et rentables tels que le vin, le whisky, les montres, les sacs et les œuvres dart.
Investor and Board Member
Dec 2022
About • JAK was founded in 2014, in Lisbon, Portugal, by Isabel and José Maria. Part of JAK's vision is to create products with modern design, that are made of high-quality materials and age beautifully over time. We create sneakers and accessories for an urban lifestyle and everyday use. Production • JAK shoes and accessories are produced in the northern region of Portugal, famous for its multi-generation shoe production family owned factories. We source locally and responsibly, and follow a strict ethical code, making sure our products’ raw materials have less environmental impact, and that the people that work with us are fairly and ethically treated. To ensure this, we hand-pick all our suppliers, and visit their facilities on a regular basis. Values • We are perfectionists, testing and crafting our products to the ultimate detail. We like simplicity and believe that a minimalistic and monochromatic design highlights the high-quality materials we source and the craftsmanship of our Made in Portugal shoes. We want to go beyond fashion and create an authentic lifestyle experience. It's our way of building and influencing tomorrow. Components • Due to its combination of flexibility and durability over time, we mostly use full grain leather, which is the highest quality and most valued part of the hide. Full grain leathers carry natural markings, that add character and age beautifully over time, just like people.
Investisseur
Jun 2022
Commune is a disruptive urban coliving concept for single-parent families. We make their lives easier by creating a community in which all parents and their children are able to thrive. Indeed, Commune brings a pragmatic and much-needed turnkey housing solution to best accommodate parenting duties and address kids’ needs. By doing so, we prevent the vicious circle of social, professional and financial hardship traditionally experienced by solo parents after a family breakup. At Commune, each family maintains their independence and has their own individual furnished housing unit, which includes 2 sleeping spaces, 1 kitchenette and 1 bathroom. Simultaneously, family members enjoy the advantages of communal life. We offer magnificent shared spaces, notably a fully-equipped kitchen, a creative play room, as well as an extensive range of mutualised services: daycare, sport classes, legal assistance, amongst others. Commune‘s first location will open in Paris soon.
early stageReal Estate
Investor
Mar 2022
La marque Juste et Honnête de protections périodiques et soins intimes bio, engagés qui prend soin de vous : des compositions transparentes, des produits efficaces, de la douceur, et du respect pour vos corps/la santé. Et le grand plus : un achat chez Jho = un don à 5 associations qui prennent en charge des femmes dans la précarité ! 💚
mid stageRetail
Investor and Board Member
Feb 2022
A startup that makes sense 🚀 Because renting a place to live in France should be easy! SmartGarant is revolutionizing the landlord-tenant relationship by facilitating access to rental housing for people who do not meet landlords standards (freelancers, self-employed, expatriates, students or young workers, etc.). SmartGarant is the 2.0 guarantor that boosts tenants rental records and reassures landlords. Our service is totally free of charge for the owner and at the tenants expense. Supported by a leading insurer in the real estate sector in Europe, SmartGarant checks the creditworthiness of its tenants, authenticates their supporting documents, covers and compensates owners free of charge for any unpaid rent up to 24 months in order to restore a relationship of trust between owners and tenants. Our vision 💡 SmartGarant is the French pioneer of the 100% digital guarantor, and aims to become a major and essential player in rental life in France, by facilitating access to housing and providing a better rental experience for both owners and tenants. Our values 🤝 The values that drive us are transparency for our customers and partners, efficiency and responsiveness of execution and solidarity. In parallel with our fight to (better) house our tenants, our teams are committed on a daily basis to finding new ways to help the most disadvantaged to find housing through concrete and associative actions. If you share our ambition and values, take up the challenge: we are looking for our talents of tomorrow! SmartGarant is a member partner of the SNPRM and UNIS.
mid stageReal Estate
Investisseur
Jul 2020
TRAJAN CAPITAL select, support and finance talented and ambitious entrepreneurs to acquire SMEs with untapped potential, transform them and boost their development to leverage their full potential of value creation
Active Investor
Jun 2020
Voltaire est la marque française de vélos électriques élégants et intemporels, pensés pour une utilisation urbaine au quotidien. 🎁 6 boutiques situées au cœur de Paris (Marais, Saint-Germain & Sentier), à Levallois, Bruxelles et Séoul 🤝 Partenariat avec plus de 200 détaillants à travers le monde 🌍 Présence dans 15 pays 🥰 Meilleure satisfaction clients parmi les marques de VAE avec des notes de 4.9 sur Google et 4.7 sur Trustpilot 📱 Une communauté engagée de plus de 40 000 abonnés sur nos réseaux sociaux 🏆 Lauréat du Design & Innovation Award 2024, récompensant notre engagement envers lexcellence et linnovation. Découvrez nos modèles sur www.voltaire.bike ou retrouvez-nous sur instagram @voltaire.cycles 🇬🇧🇺🇸 Voltaire is the French brand of timeless e-bikes designed for everyday urban use. 🎁 6 flagship stores located in the heart of Paris, Brussels and Seoul 🤝 Partnership with over 200 retailers worldwide 🌍 Presence in 15 countries, bringing our refined aesthetic to a global audience 🥰 Outstanding customer satisfaction with a score of 4.9 on Google and 4.7 on Trustpilot 📱 An engaged community of over 40,000 followers on our social networks 🏆 Winner of the Design & Innovation Award 2024, recognizing our commitment to excellence and innovation. Check out our models on www.voltaire.bike or find us on Instagram @voltaire.cycles.
Investor
Jan 2020
Created in 2018, Kinéis is a satellite operator and global connectivity provider. The company inherits the forty years of expertise of the ARGOS system, founded by the CNES (French Space Agency) and historically operated by CLS (Collecte Localisation Satellites) to develop a reliable technology providing easy access to useful satellite data. In order to simplify and multiply the uses of professionals and individuals, Kinéis locates and connects objects wherever they are on the planet. In doing so, it deploys all its technological innovation capacities to bring together NewSpace and IoT. Kinéis has raised €100 million (CLS 32%, CNES 26%, Bpifrance 20%, Ifremer, Thalès, HEMERIA, CELAD, BNP Paribas Développement, ETHICS Group, MJKD, Consuls Développement, Invest Marel, and others) and achieved a turnover of €7 million in 2020 (+40% compared to 2019). Kinéis is part of the French Tech Next40 2021 label.
Investor
Nov 2019
Hexagone is a creative and technological agency committed to supporting life sciences companies in their digital strategies. Our solutions enable to implement operational and pragmatic multi-channel strategies at affordable costs while increasing the impact of marketing initiatives. We are committed to sharing our expertise in marketing initiative design and change management to ensure the success of our clients'​ marketing campaigns. Hexagone also provides simple and affordable content development solutions that facilitate the rapid implementation of our clients'​ digital assets.
Experience · 12 entries
All (12)
Investments (11)
Founder (1)
Board (3)
2025
Investor and Board Member
Dec 2025
HyprView addresses the critical limits of current predictive biomarkers in oncology, where relying solely on genes and proteins fails to accurately match patients to precision therapies. The core innovation is a proprietary and patented imaging platform combining advanced photonics and AI to achieve unmatched data quality for a better patient stratification. From raw biopsies, we capture massive amount of information and apply deep learning to this unique data set to build comprehensive biomarker signatures for predicting therapy response.
2023
Investisseur
Apr 2023
on.suzane est la première plateforme SVOD collaborative spécialisée sur les sujets féminins et féministes. on.suzane diffuse et produit des contenus (documentaires/fictions/émissions) qui ont vocation à provoquer une prise de conscience personnelle et 
un changement sociétal. À travers ses 4 thématiques (la maternité, le corps, la condition féminine, portraits inspirants), on.suzane aide les femmes à sinformer sur les sujets qui les concernent, afin quelles puissent sapproprier leur vie. Les abonnées ont un accès illimité aux films mais également à la communauté on.suzane à travers son outil collaboratif intégré à la plateforme. Elles sont invitées à échanger, collaborer, se rencontrer 
afin de créer des réseaux d’entraide féminins.
2022
Investisseur et Membre du Conseil
Dec 2022
Investissez dans des biens rares et rentables tels que le vin, le whisky, les montres, les sacs et les œuvres dart.
Investor and Board Member
Dec 2022
About • JAK was founded in 2014, in Lisbon, Portugal, by Isabel and José Maria. Part of JAK's vision is to create products with modern design, that are made of high-quality materials and age beautifully over time. We create sneakers and accessories for an urban lifestyle and everyday use. Production • JAK shoes and accessories are produced in the northern region of Portugal, famous for its multi-generation shoe production family owned factories. We source locally and responsibly, and follow a strict ethical code, making sure our products’ raw materials have less environmental impact, and that the people that work with us are fairly and ethically treated. To ensure this, we hand-pick all our suppliers, and visit their facilities on a regular basis. Values • We are perfectionists, testing and crafting our products to the ultimate detail. We like simplicity and believe that a minimalistic and monochromatic design highlights the high-quality materials we source and the craftsmanship of our Made in Portugal shoes. We want to go beyond fashion and create an authentic lifestyle experience. It's our way of building and influencing tomorrow. Components • Due to its combination of flexibility and durability over time, we mostly use full grain leather, which is the highest quality and most valued part of the hide. Full grain leathers carry natural markings, that add character and age beautifully over time, just like people.
Investisseur
Jun 2022
Commune is a disruptive urban coliving concept for single-parent families. We make their lives easier by creating a community in which all parents and their children are able to thrive. Indeed, Commune brings a pragmatic and much-needed turnkey housing solution to best accommodate parenting duties and address kids’ needs. By doing so, we prevent the vicious circle of social, professional and financial hardship traditionally experienced by solo parents after a family breakup. At Commune, each family maintains their independence and has their own individual furnished housing unit, which includes 2 sleeping spaces, 1 kitchenette and 1 bathroom. Simultaneously, family members enjoy the advantages of communal life. We offer magnificent shared spaces, notably a fully-equipped kitchen, a creative play room, as well as an extensive range of mutualised services: daycare, sport classes, legal assistance, amongst others. Commune‘s first location will open in Paris soon.
early stageReal Estate
Show all 12 entries ↓
Investment activity
2019–2025 · 11 investments
2019120203202252023120251
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