XONAI, a cloud optimization solution helping organizations reduce data infrastructure costs, has closed $3.5 million in Seed funding.  London-based Kadmos Capital led the round with participation from investors Adara Ventures, Deep Science Ventures, Nauta Capital, Notion Capital, and notable angels Mehdi Ghissassi, Director of Product Management for Google DeepMind, Martin Gould, former Head of Product for Spotify’s Content Platform, among others.