Z.AI Co., Ltd., together with its subsidiaries, provides customized large model-related services in the People's Republic of China. It operates through two segments: On-premise Deployment and Cloud-based Deployment. The company develops customized large model-related services delivered on customers' own infrastructure, and offers cloud-based large model-related services through cloud infrastructure. It also provides subscription-based and usage-based services, along with related services such as model training and fine-tuning, and offers z.ai, AutoGLM, AutoClaw, ChatGLM, Zread.ai, and AMiner. Formerly known as Knowledge Atlas Technology Joint Stock Company Limited, it changed its name to Z.AI Co., Ltd. in July 2026. The company was incorporated in 2019 and is headquartered in Beijing, China.