Scale AI is a San Francisco-based data infrastructure company founded in 2016 by Alexandr Wang and Lucy Guo, originally focused on data labeling and annotation services for training machine learning models, and later expanding into a broader AI data and evaluation platform serving both commercial and government customers.
In 2025, Meta invested approximately $14.3 billion for a 49% stake in Scale AI, and founder Alexandr Wang departed to become Meta's Chief AI Officer, leading Meta Superintelligence Labs. Following Wang's departure, Scale AI named Francis deSouza, formerly Google Cloud's COO, as its new chief executive, marking a significant leadership transition for the company as it continues operating as a strategically important but now minority-Meta-owned data infrastructure provider to the broader AI industry.