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Sebastien Dellis

Sébastien Dellis is a Brussels-based entrepreneur who co-founded AppTweak in 2014, building it into a leading App Store Optimization platform used by over 1,500 mobile app publishers.

Dellis co-founded AppTweak alongside Olivier Verdin in Brussels in 2014. The company started as a side project called "The ASO Toolbox" and grew into a professional-grade ASO platform. AppTweak reached profitability in 2017 and reported 957% growth between 2014 and 2021 before raising a $22M Series B from Media Group Rossel.