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 offers various platforms, including CrowdGen Crowd Platform, AI Data Annotation Platform, AI Data Solutions; and China Platform & Services. It also provides sourcing and recruitment, qualification and smart matching, crowd Payments, and crowd support; data collection and annotation, LLM & Generative AI workflows fine-tuning and evaluation, and AI automation tools; and LLM & Generative AI data solutions, supervised fine tuning, human preference ranking, red teaming, and AI training data; and MatrixGo and Generative AI data annotation platform, AI data services for China markets, and off-the-shelf datasets. The company serves technology, automotive, financial services, retail, governments, and healthcare 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.