Here is a list of some wellknown AI (Artificial Intelligence) companies:

1、Google AI (USA): A subsidiary of Alphabet Inc., Google AI focuses on developing and applying various forms of AI to help people and businesses.
2、Microsoft AI (USA): Microsoft's AI division focuses on developing AI solutions for various industries, including healthcare, finance, and education.
3、IBM Watson (USA): IBM's AI division, Watson, provides AI solutions for businesses, including natural language processing, machine learning, and data analytics.
4、Amazon AI (USA): Amazon's AI division focuses on developing AI solutions for various industries, including ecommerce, healthcare, and finance.
5、Facebook AI (USA): Facebook's AI division focuses on developing AI solutions for various applications, including facial recognition, natural language processing, and computer vision.
6、Apple AI (USA): Apple's AI division focuses on developing AI solutions for various applications, including Siri, Core ML, and Vision Framework.
7、Baidu AI (China): Baidu's AI division focuses on developing AI solutions for various industries, including search, advertising, and autonomous driving.
8、Alibaba AI (China): Alibaba's AI division focuses on developing AI solutions for various industries, including ecommerce, finance, and logistics.
9、NVIDIA AI (USA): NVIDIA's AI division focuses on developing AI solutions for various industries, including computer vision, natural language processing, and robotics.
10、DeepMind (UK): A leading AI research organization, DeepMind is known for its work on deep learning and AI applications.

AI Startups:

1、Zoox (USA): A selfdriving car company acquired by Amazon.
2、Nuro (USA): A robotics company developing autonomous delivery vehicles.
3、Clarifai (USA): A computer vision company providing AI solutions for various industries.
4、Element AI (Canada): A AI research organization focusing on developing practical AI solutions.
5、SenseTime (China): A leading AI company in computer vision and deep learning.

AI Research Organizations:

1、MIT AI Lab (USA): A research organization focused on developing AI solutions for various industries.
2、Stanford AI Lab (USA): A research organization focused on developing AI solutions for various industries.
3、Carnegie Mellon AI (USA): A research organization focused on developing AI solutions for various industries.

Other notable AI companies:

1、Salesforce Einstein (USA): A suite of AIpowered solutions for customer relationship management.
2、SAP Leonardo (Germany): A suite of AIpowered solutions for enterprise applications.
3、Oracle AI (USA): A suite of AIpowered solutions for various industries, including finance and healthcare.

This is not an exhaustive list, and there are many more AI companies and research organizations around the world.