Sébastien Lefebvre

Sébastien brings a unique perspective to Elaia as a serial entrepreneur who has built, scaled, and successfully exited multiple companies. At Elaia he focuses on deep tech investments in AI, given his technical backgroud at the intersection of data and AI.

He founded two companies, both achieving successful exits. Mesagraph, a data analytics and social intelligence platform, was acquired by Twitter in 2014. Following the acquisition, Sébastien relocated to London and became Director of Growth, EMEA at Twitter for three years, where he led commercial expansion across European markets and gained deep expertise in scaling tech platforms internationally.

Beyond his operating roles, Sébastien is highly active in the startup ecosystem as both a mentor and business angel, working with early-stage founders on product-market fit, go-to-market strategy, and international expansion. His hands-on entrepreneurial experience—from technical architecture to commercial scaling—gives him credibility and empathy when working with Elaia's portfolio companies. Sébastien began his career at Videotron in Montreal as an architect for strategic planning.

Sébastien holds a degree from École Supérieure des Sciences et Technique de l'Ingénieur de Nancy.