Appen Limited operates as an AI lifecycle company that provides data sourcing, data annotation, and model evaluation solutions in Australia, the United States, and internationally. It operates through two segments, Global Services and New Markets. The company provides a platform for the AI data development process. Its platform provides data annotation, such as workflow management and collaboration, data organization, communication, and performance analysis; audio transcription; data collection and categorization; data monitoring; and dataset creation, model performance evaluation, fine-tuning, A/B testing for validation. It offers services including guidance, crowd management, project management, and customized professional services. It serves the healthcare, finance, retail, technology, automotive, media and entertainment, telecommunications and call center, and aerospace and defense industries. The company was formerly known as Appen Holdings Pty Limited and changed its name to Appen Limited in October 2014. Appen Limited was founded in 1996 and is headquartered in Chatswood, Australia.