Appen

Appen is a global AI training data company that provides human-annotated datasets, data collection, and content relevance rating services to power machine learning and AI models. They operate a gig-economy crowd platform (Appen Connect) with over one million contractors worldwide who perform labeling, annotation, and AI evaluation tasks. The company serves major technology companies and has been a foundational part of the AI supply chain for training large language models and search engines.