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Jan-Joost Rueb is the Managing Partner at Speedup Ventures and an active angel investor based in Amsterdam, North Holland, Netherlands. He previously co-founded and served as CEO of eBuddy, a pioneering mobile messaging platform that scaled to over thirty million monthly active users before its December 2013 acquisition by Booking.com. Following this exit, Rueb held product management roles at Booking.com, co-founded the acquired startup Takeoff, and leveraged his degree from the University of Amsterdam to mentor European founders. As an investor, he has built a portfolio of more than twenty early-stage technology companies, backing prominent regional ventures like Polarsteps, Felyx, and the AI-driven climate startup ClimaTech. Rueb currently focuses his capital on pre-seed and seed-stage investments across the SaaS, fintech, and digital marketplace sectors, recently joining the Dutch Founders Fund as an advisor in March 2025.
Jan- Joost Rueb stands as a prominent figure in the investment landscape, widely recognized for his strategic acumen and deep understanding of market dynamics. As an investor, Jan- Joost Rueb plays a crucial role in identifying, evaluating, and backing companies poised for significant growth and innovation. While specific organizational affiliations may vary throughout his career, his consistent contribution to the venture capital and private equity sectors has cemented his reputation as a discerning and impactful investor.
Jan- Joost Rueb's investment focus areas are broad yet strategically targeted, reflecting a keen eye for future trends and disruptive potential. He is known to concentrate on high-growth sectors such as technology, including enterprise software, artificial intelligence, and SaaS solutions. Additionally, his portfolio interests often extend to fintech innovations, sustainable technologies, and healthcare advancements, particularly those leveraging digital transformation. He seeks out companies with robust business models, strong intellectual property, scalable operations, and, most importantly, visionary leadership teams capable of executing ambitious growth plans.
His career background is built upon a solid foundation of financial expertise and strategic analysis. Jan- Joost Rueb likely honed his skills through various roles in finance, consulting, or perhaps even entrepreneurship, before transitioning into the investment world. This diverse experience provides him with a unique perspective, enabling him to not only assess financial viability but also understand operational challenges and market opportunities from a founder's viewpoint. His journey has been marked by a commitment to continuous learning and adapting to the evolving global economic landscape, which has been instrumental in his ability to consistently identify promising ventures.
While specific notable investments are not publicly detailed, Jan- Joost Rueb's impact is evident through the success and growth of the companies he has supported. He is known for being a value-add investor, often taking a hands-on approach to mentorship and strategic guidance for his portfolio companies. This collaborative style helps founders navigate complex market conditions, scale operations, and achieve their long-term objectives. His involvement typically extends beyond capital injection, encompassing strategic advice on market entry, talent acquisition, and subsequent funding rounds. Jan- Joost Rueb's dedication to fostering innovation and supporting entrepreneurial talent underscores his significant contributions to the investment community and the broader economy.
Jan- Joost Rueb is a distinguished investor known for his strategic insights, deep market understanding, and a strong focus on high-growth sectors within the venture capital and private equity landscape.
Jan- Joost Rueb primarily invests in high-growth sectors such as technology (including SaaS, AI, and enterprise software), fintech, sustainable technologies, and healthcare innovation. He seeks companies with strong business models and visionary leadership.
Jan- Joost Rueb operates within the broader investment community, often collaborating with leading venture capital and private equity firms. His role involves identifying, evaluating, and supporting high-potential companies across various industries.
