ACLS vs VNET Comparison

Axcelis Technologies Inc designs, manufactures, and services ion implantation and other processing equipment used in the fabrication of semiconductor chips. In addition to equipment, the company provides aftermarket lifecycle products and services, including used tools, spare parts, equipment upgrades, maintenance services, and customer training. Geographically, the group has a business presence in North America, Asia Pacific, and Europe, of which key revenue is derived from the Asia Pacific.

VNET started as AsiaCloud in 1999 and moved into the data center business, opening its first self-developed data center in 2010. The firm listed (as 21Vianet) on the Nasdaq in April 2011, subsequently changing its name to VNET Group in 2021. It originally focused on providing data center services such as colocation and cloud services to retail clients in China, but added hyperscale customers in 2019 and now counts large Chinese hyperscalers such as Alibaba Cloud, Tencent Cloud, and Huawei Cloud as customers. At the end of September 2025, it had 52,288 retail cabinets, with the majority in Beijing, Shanghai, and the Greater Bay area. It also had 783 MW of wholesale capacity in service, with a further 306 MW under construction and a further 705 MW held for future development.