UmojaHack Africa 2023, the largest pan-African machine learning hackathon, took place 18-19 March 2023. The event brought together over 1000 students from 345 universities in 36 countries to build machine learning models for climate change. The winners of each challenge won prizes of cash and online learning licenses amounting to more than $10 000. Sponsors for the event included Mara, DeepMind, Kaggle, MPOWER Financing, African Energy Chamber, and InstaDeep. Zindi has grown the network of participating universities to almost 350 higher education institutions across the continent.