Appen

Appen is a data platform designed to help organizations build, improve, and deploy AI and machine learning models by providing high-quality training data and evaluation services. The platform combines a global crowd of contributors with tools for data collection, data labeling, and model assessment across text, image, audio, video, and sensor data. Appen enables users to define detailed annotation guidelines, configure workflows, and manage complex labeling projects at scale, with quality controls such as consensus checks, gold-standard data, and reviewer hierarchies.

Key capabilities include data sourcing from diverse populations, multilingual annotation, sentiment and intent analysis, entity recognition, image and video bounding boxes, transcription, and speech recognition training. Appen also offers model evaluation and human-in-the-loop feedback to continuously refine AI systems. Typical use cases span search relevance tuning, content moderation, virtual assistants, recommendation systems, autonomous vehicles, and computer vision applications in retail, manufacturing, and healthcare.