1. Tencent

Tencent earlier opened a cloud data center in Silicon Valley to keep up with the market share growth of US cloud services. Half of WeChat's 770 million daily users use the service for more than 90 minutes a day.

2. Alibaba

Although Alibaba is the largest e-commerce company in the world, its fastest growing is cloud services. It has cloud data centers around the world and has begun selling big data services to small and medium-sized enterprises. Alibaba Cloud entered Gartner's IaaS Magic Quadrant in June.

3. Baidu

Baidu focuses on artificial intelligence, with more than 1,300 people dedicated to its development. Baidu also announced a partnership with Nvidia to enhance its cloud and autonomous driving artificial intelligence capabilities through Volta GPUs.

4. IBM

IBM accounts for 40% of revenue from blockchain, cloud computing and artificial intelligence. By 2017, it also had major deals for cloud services for BMW and Bombardier.

5. Alphabet (Google parent company)

Artificial intelligence is still one of the key areas of Alphabet and its subsidiaries, and Google Cloud Platform is not explicitly mentioned in the company summary. MIT says Alphabet can save 40% on data center cooling energy using DeepMind machine learning algorithms.