Sébastien Le Roy

Partner @Serena

📍 France, France🔄 Updated September 2026💼 13 investments📅 8 years investing🗓 Last invested Mar 2025𝕏 @upgrade_to_unlock
Operator-angel🌍 France
13
Total investments
4
Early stage
6
Mid stage
2
Late stage
8y
Years active

Portfolio

12 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor
Mar 2025
25 millions dappareils électroménagers sont jetés chaque année en France. Un sacré gâchis, vous ne trouvez pas ? Chez Underdog, nous nous sommes donc lancés un défi de taille : reconditionner de lélectroménager à Nantes en France.
mid stageRetail
Board Member
Oct 2024
Formality is the premier AI solution for managing legal documents. Your companys expansion is bringing some chaos. Files are a mess with confusing names, access rights are tricky to navigate, and were even missing contract renewals! Formality seamlessly centralizes all your legal documents. By harnessing the power of artificial intelligence, the platform ensures instant access to the latest versions, rapid information retrieval, and timely alerts for important dates, eliminating the risk of errors.

Investor
Feb 2023
Jimmy conçoit et opère des générateurs thermiques atomiques pour décarboner massivement lindustrie
Board Member
Jan 2023
Streamline access, organization, and sharing of medical data to enhance the quality of care and clinical research.
Board Member
Jan 2022
Pretto est la fintech du crédit immobilier. Notre mission : instaurer la confiance dans la recherche de crédit immobilier. Envie den savoir plus sur Pretto et comment on y travaille et sépanouit ? On se retrouve ici : http://pretto.link/bienvenue-chez-pretto
Board Member
Jul 2021
MONI is the new solution for diasporas willing to support their loved ones in more than 150 countries. Services include sending money in cash or mobile wallets, airtime top ups and prepaid cards recharges. Our MONI platform is accessible through direct sales on https://www.monisnap.com/fr/ et https://allo.monisnap.com/ but also via strategic partnerships thanks to our remittance-as-a-service platform. Nickel, Bnext and other neobanks trust MONI to offer the best in class user experience to their clients. Our solution generates additional Net banking income and stickyness to our partner's applications. MONI was founded in 2017 by former employees from Google and Groupon, finally bringing to life the long-awaited disruption in the traditional European remittance market, which suffers from poor customer satisfaction, high fees and dull products. MONI is a France based start-up, authorized to work as an agent of Ria Payment Institution and backed by leading investors in Europe like Serena Capital, and Truffle Capital. Monisnap raised a 10M Serie A in 2021. You want to join the adventure? We are hiring! Drop us an email at contact@monisnap.com
Board Observer
Apr 2021
Build high-quality datasets, fast. Enterprises trust us to streamline their data labeling ops and build the best datasets for their custom models, generative AI, and LLMs ___ Why Kili Technology? You might not know this, but: MNIST’s dataset has an error rate of 3.4% and is still cited by more than 38,000 papers. The ImageNet dataset, with its crowdsourced labels, has an error rate of 6%. This dataset arguably underpins the most popular image recognition systems developed by Google and Facebook. Systemic error in these datasets has real-world consequences. Models trained on error-containing data are forced to learn those errors, leading to false predictions or a need of retraining on ever-increasing amounts of data to “wash out” the errors. Every industry has begun to understand the transformative potential of AI and invest. But the revolution of ML transformers and relentless focus on ML model optimization is reaching the point of diminishing returns. What else is there? ______ The Company Kili began as an idea in 2018. Edouard d’Archimbaud, our co-founder and CTO, was working at BNP Paribas, where he built one of the most advanced AI Labs in Europe from scratch. François-Xavier Leduc, our co-founder and CEO, knew how to take a powerful insight and build a company around it.While all the AI hype was on the models, they focused on helping people understand what was truly important: the data. Together, they founded Kili Technology to ensure data was no longer a barrier to good AI.By July 2020, the Kili Technology platform was live and by the end of the year, the first customers had renewed their contract, and the pipeline was full. In 2021, Kili Technology raised over $30M from Serena, Headline and Balderton. Today Kili Technology continues its journey to enable businesses around the world to build trustworthy AI with high-quality data.
Board Observer
Apr 2021
We help software product teams build lightning-fast, accurate, and robust document processing automation features in their applications. Our API gives developers access to state-of-the-art deep learning algorithms for document parsing through an easy-to-use and developer-centric platform. We serve software editors from a wide range of sectors including HRIS, Accounting, Procurement, Logistics, Loan Origination, Fleet Management, Property Management and much more.
Board observer
Dec 2019
At Sarus, we believe that the potential of AI can only be realized if it does not come at the cost of privacy. This is why we are developing a privacy layer to let Enterprises and Public organizations unleash the full potential of sensitive data, and do research, analytics and AI while keeping data safe. With Sarus, data scientists and analysts work on data without ever seeing it. Compliance is streamlined, data value unlocked from day one and security maximal, especially in the fields of healthcare, finance, and sustainable cities. Our solution implements the latest research in privacy-preserving technology, namely differential privacy, remote execution and synthetic data. Sarus was founded in 2019 by three seasoned entrepreneurs with strong engineering and scientific backgrounds. Since then, we have raised over €3M, delivered breakthrough science, hired an outstanding team, published innovative approaches to privacy-preserving AI, built a product and signed first clients. Interested in joining the adventure? Reach out to us! All our job offers are here: https://sarus-technologies.welcomekit.co/
Board observer
Nov 2019
True magic happens when the expertise of industry experts combines with the power of mathematics and digital tools. Kardinal harnesses the wealth of your data to address your most significant strategic and operational challenges, providing tangible and immediately actionable results that unlock the full potential of your last mile. Fleet sizing, route optimization, peak period preparation, territory zoning, and even the study of fleet conversion to electric vehicles: we assist you with all business issues where mathematics play a role, offering practical and immediately implementable solutions.
Board observer
Oct 2019
Klarys is the first eProcurement platform tailored to the specific challenges of fresh food. Our solution is designed for all players in the fresh food supply chain: suppliers and producers, central purchasing agencies and stores, wholesalers and processors. It digitizes and simplifies fresh food purchasing processes to : - Gain operational efficiency - Manage fresh food performance - Ensure end-to-end data reliability - Meet corporate CSR commitments With our all-in-one platform, buying fresh food has never been easier. Follow us for our latest news!
Board observer
Dec 2018
PixelMe is a smart attribution platform for savvy marketers. We're trusted by 12,000+ growing companies around the world. Our Smart Attribution & Audience Builder solutions help you track, analyze, and optimize your marketing. Smart Attribution tracks every customer touchpoint, and shows your ROI across acquisition channels to automatically reveal your most effective channels. Audience Builder is an all-in-one URL shortener. You can brand links, add UTM tags to track traffic sources, and build retargeting audiences from anyone who clicks on your links to increase CTR & conversions. PixelMe was founded in 2017 as a fully remote company. We're a global team with our 3-cofounders based in France. Transform your marketing reporting and optimize your ROI today! Sign up for free at pixelme.me
Experience · 15 entries
All (15)
Investments (13)
Founder (1)
Board (11)
2025
Investor
Mar 2025
25 millions dappareils électroménagers sont jetés chaque année en France. Un sacré gâchis, vous ne trouvez pas ? Chez Underdog, nous nous sommes donc lancés un défi de taille : reconditionner de lélectroménager à Nantes en France.
mid stageRetail
2024
Board Member
Oct 2024
Formality is the premier AI solution for managing legal documents. Your companys expansion is bringing some chaos. Files are a mess with confusing names, access rights are tricky to navigate, and were even missing contract renewals! Formality seamlessly centralizes all your legal documents. By harnessing the power of artificial intelligence, the platform ensures instant access to the latest versions, rapid information retrieval, and timely alerts for important dates, eliminating the risk of errors.

2023
Investor
Feb 2023
Jimmy conçoit et opère des générateurs thermiques atomiques pour décarboner massivement lindustrie
Board Member
Jan 2023
Streamline access, organization, and sharing of medical data to enhance the quality of care and clinical research.
2022
Board Member
Jan 2022
Pretto est la fintech du crédit immobilier. Notre mission : instaurer la confiance dans la recherche de crédit immobilier. Envie den savoir plus sur Pretto et comment on y travaille et sépanouit ? On se retrouve ici : http://pretto.link/bienvenue-chez-pretto
Show all 15 entries ↓
Investment activity
2018–2025 · 13 investments
20181201942021320221202322024120251
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