21Vianet

As of 2026-10-28, 21Vianet has 4 tracked suppliers and 5 tracked customers in this dataset; its largest supplier by market cap is Schneider Electric. The supplier and customer lists here follow a shared pattern for this segment rather than being individually confirmed for 21Vianet — see /methodology.

Sourced from 2 references — Wikipedia, secondary source — last verified 2026-07-19.

Chinese carrier-neutral data-center and cloud operator.

Ticker: NASDAQ: VNET
Headquarters: Beijing
Founded: 2009
Revenue: $544M (FY2019) · +10.0% YoY
Net income: $-36M
Operating margin: 20.5%
Market position: niche
Value-chain segment: Data Center Operators (Colo)
Key products: wholesale IDC (Internet Data Center) services, retail IDC colocation cabinets

About 21Vianet

21Vianet, headquartered in China, operates in the Data Center Operators (Colo) segment of the semiconductor & AI supply chain and is positioned as a market niche there. Its key products include wholesale IDC (Internet Data Center) services, retail IDC colocation cabinets. wafergraph maps 4 tracked suppliers and 5 tracked customers for 21Vianet across the value chain. It has a supply-chain criticality score of 6/100, with 19 companies downstream of it.

VNET Group, Inc. is the largest private, carrier-neutral Internet and data center service provider in China. A Cayman Islands holding company, VNET provides value-added telecommunications services in China through four domestic PRC companies: VNET Technology, BJ iJoy, WiFire Network, and SH Zhiyan. It is the exclusive operator of Microsoft Azure and Microsoft 365 services in China, and also houses data centers for Alibaba and other Chinese companies.

Role in the chain

21Vianet is a market niche in AI & Data Center (Data Center Operators (Colo)), headquartered in China. Chinese carrier-neutral data-center and cloud operator.

Diligence questions

The dataset records 4 tracked suppliers for 21Vianet. Which of those edges are researched (named in a filing or primary source) versus segment-inferred, and what happens if one of them stops shipping?
3 of 21Vianet's tracked suppliers are a monopoly or leader (including Delta Electronics, Schneider Electric, Vertiv). Which of those are actually single-source for the process step you care about?
The dataset names 5 tracked customers for 21Vianet. How concentrated is demand among those names, and which of them have a documented second source in this graph?
21Vianet is headquartered in China. What jurisdiction, export-control or logistics risk sits at that HQ, versus at the fabs or plants the filings actually name?
21Vianet trades as NASDAQ:VNET. What does the latest reported period say about capacity and backlog versus the graph position above?
Before treating any edge as a verified relationship, check the provenance labels on the company page and the method note at /methodology.

Full diligence pack for 21Vianet