Appen Butler Hill Inc is a global leader in the development of high-quality, human-annotated datasets for machine learning and artificial intelligence. The company was founded in 1996 and is headquartered in Sydney, Australia, with offices in the United States, United Kingdom, and Philippines. Appen Butler Hill Inc provides a range of services including data collection, transcription, and annotation. The company has a diverse client base that includes technology companies, government agencies, and academic institutions.