China Cloud vs Overseas Cloud: Which Data Storage for Foreign Companies in China?

For foreign companies operating in China, China-hosted cloud (中国云, zhōngguó yún) is mandatory for any data subject to localization requirements, while overseas cloud (海外云, hǎiwài yún) is only viable for non-personal, non-important business data — making the choice approximately 80% compliance-driven and only 20% performance-driven. A 2025 survey by the China Cloud Computing Alliance found that 76% of foreign-invested enterprises (FIEs) in China operate a hybrid cloud architecture: a China-hosted cloud for data subject to localization and an overseas cloud for non-China operations. The average FIE spends RMB 1.5-4 million per year on China-hosted cloud services, compared to RMB 800,000-2.5 million on overseas cloud services for China-related workloads. Understanding the cost, compliance, latency, and service differences between the two options is essential for making the right data storage decision.

China-Hosted Cloud: The Compliant Option

China-hosted cloud services maintain data centers physically located within China’s borders and hold the necessary Chinese telecommunications licenses. Providers fall into two categories. Domestic Chinese cloud providers — Alibaba Cloud (阿里云, ālǐ yún), Huawei Cloud (华为云, huáwéi yún), Tencent Cloud (腾讯云, téngxùn yún), Baidu AI Cloud (百度智能云, bǎidù zhìnéng yún), and JD Cloud (京东云, jīngdōng yún) — are fully owned by Chinese companies and hold their own value-added telecom service licenses (增值电信业务经营许可证, zēngzhí diànxìn yèwù jīngyíng xǔkězhèng). These providers dominate the China cloud market with a combined market share of approximately 65% as of 2026.

Foreign cloud providers with China-licensed partners — AWS China (operated by Sinnet, 光环新网, in the Beijing region and NWCD, 西云数据, in the Ningxia region) and Azure China (operated by 21Vianet, 世纪互联) — provide the same cloud infrastructure technology as their global counterparts but through Chinese-licensed entities that hold the required permits and guarantee data stays within China. GCP (Google Cloud Platform) does not have a China-licensed partner and is not directly available as a China-hosted service. China-hosted clouds are the only compliant option for: personal information subject to data localization under PIPL Articles 36-38; important data under DSL Article 31 and the 22 industry-specific catalogues; data processed by CIIOs; financial data under PBOC regulations; healthcare data under NHC regulations; and data in telecommunications, transportation, energy, education, and scientific research sectors.

Overseas Cloud: The Global Option

Overseas cloud services — AWS Global (US-East, EU-West, Asia-Pacific regions outside China), Azure Global, GCP, and other non-China-hosted providers — are operated by entities without Chinese telecom licenses, maintaining no data center infrastructure within China. These services are accessible from within China but face network performance limitations due to the Great Firewall (GFW, 防火长城, fánghuǒ chángchéng) and cross-border bandwidth constraints. Access latency from major Chinese cities to overseas cloud regions like Singapore or Hong Kong typically ranges from 100-350ms, compared to 5-30ms for China-hosted services.

Overseas clouds are generally not compliant for personal information or important data of Chinese individuals, as cross-border transfer without following one of the three approved PIPL routes (CAC security assessment, SCCs, or CNCA certification) violates PIPL Articles 38-40. However, overseas clouds remain viable for: general business data that is not personal information and does not qualify as important data; consolidated analytics and aggregated reporting data; data of non-Chinese individuals processed by overseas headquarters; and data for non-China business operations. Even for these categories, the company should document the legal basis for using overseas cloud and maintain a data classification record demonstrating the data does not fall under PIPL or DSL localization requirements.

Comparative Analysis: 12 Key Dimensions

Cost Comparison: Detailed Breakdown

The cost differential between China-hosted and overseas cloud services varies significantly by service type. For compute instances (virtual machines), China-hosted clouds typically cost 10-25% more than equivalent overseas instances. An AWS China t3.medium instance (Sinnet-operated) costs approximately RMB 0.98/hour (USD 0.14), compared to approximately USD 0.04/hour for the same instance type in AWS US-East. Alibaba Cloud’s ecs.g6.large costs approximately RMB 0.75/hour. The premium reflects the operating costs of maintaining separate China infrastructure and China’s higher energy and bandwidth costs.

Bandwidth costs show the largest differential. China-hosted cloud outbound bandwidth costs RMB 600-1,200/Mbps/month, compared to RMB 50-200/Mbps/month for overseas cloud outbound bandwidth — a 6-12x premium. For data-heavy workloads such as video streaming, large file transfers, and real-time communications, bandwidth costs can exceed compute and storage costs combined. Storage costs are more comparable: standard object storage costs approximately RMB 0.10-0.15/GB/month on China clouds versus RMB 0.02-0.03/GB/month overseas — a 3-5x premium. However, storage typically represents a smaller portion of total cloud spend (15-25%). The overall TCO for a China-hosted deployment is typically 20-40% higher than the equivalent overseas deployment.

Service Availability and Feature Parity

Not all cloud services available globally are available on China-hosted clouds. AWS China (Sinnet/NWCD) offers approximately 80% of the AWS global catalog, with gaps in newer AI/ML services, IoT services, and some analytics tools. Azure China (21Vianet) offers approximately 85% of the Azure catalog. Alibaba Cloud offers the most comprehensive China-specific service catalog but lacks certain global services. For AI/ML workloads, the gap is narrowing: China-hosted clouds offer Chinese LLMs (Qwen, Ernie, ChatGLM, DeepSeek) not available on overseas clouds, while overseas clouds offer Western LLMs (GPT-4, Claude, Gemini) not available in China. Foreign companies running AI workloads must verify preferred model availability on their chosen provider.

Network Performance and Compliance Certification

Network latency is one of the most noticeable differences. China-hosted cloud delivers 5-30ms latency within China; overseas cloud delivers 100-350ms from within China due to GFW inspection, cross-border cable congestion, and routing inefficiencies. Total international bandwidth for China is approximately 40 Tbps (2025 estimate), shared across all users and services. During peak hours (8-11 PM CST), congestion can add 50-150ms of additional latency to overseas connections. China-hosted clouds must pass the Multi-Level Protection Scheme (MLPS, 等级保护, děngjí bǎohù) — Level 2 minimum for commercial applications, Level 3 for CIIO workloads. All major China-hosted providers maintain MLPS Level 3 certification. The MIIT’s Cloud Computing Service Security Assessment is a separate requirement for cloud services used by telecom license holders and government entities.

Decision Framework: Choosing Your Cloud Architecture

1. Your company handles personal information or important data: Use China-hosted cloud for all data subject to localization. Alibaba Cloud, AWS China, or Azure China are compliant options. Budget RMB 1.5-4 million per year for a mid-size deployment. Maintain data classification documentation.
2. Your company operates in a regulated industry (finance, healthcare, telecom): China-hosted cloud is mandatory for regulated data. Confirm your provider holds industry-specific certifications required by your sector regulator. Alibaba Cloud and Huawei Cloud typically have the most comprehensive industry certifications.
3. Your company needs global connectivity with overseas headquarters: Implement a hybrid architecture — China-hosted for China data, overseas cloud for global operations. Use dedicated interconnect services (AWS Direct Connect China, Azure ExpressRoute China, Alibaba Cloud CEN). Budget an additional RMB 500,000-1,500,000 per year for cross-border connectivity.
4. Your company processes only general business data: Overseas cloud is legally viable but network performance issues (100-350ms latency from China) make it impractical for latency-sensitive workloads. Consider China-hosted for user-facing components and overseas for backend/non-China processing. Register an ICP license if serving public-facing content from overseas cloud.
5. Your company is a startup or small FIE: Alibaba Cloud offers the most cost-effective China-hosted option with extensive free tier. Estimated monthly cost: RMB 2,000-5,000/month for a basic setup (small compute, 50GB storage, basic bandwidth). Factor in bandwidth costs, which can exceed compute costs for data-heavy applications.

Recent Developments (2025-2026)

The cloud landscape in China continues to evolve rapidly. Alibaba Cloud’s expansion of AI/ML services has narrowed the feature gap with overseas clouds, particularly in LLM deployment and AI training infrastructure. The MIIT’s January 2026 expansion of the Cloud Computing Service Security Assessment to cover AI/ML platforms creates a formal certification pathway for AI workloads. AWS China’s 2025 expansion added 14 new services to its Sinnet-operated Beijing region, bringing total available services to over 120. On the regulatory front, the CAC’s Data Export Facilitation Measures (January 2026) created potential exemptions from strict data localization for certain non-sensitive business data in pilot FTZs. If broadly adopted, these could make overseas cloud a more viable option for some non-personal business data currently stored on China-hosted clouds. However, foreign companies should not base their architecture decisions on anticipated exemptions — the pilot programs are limited in scope and geography, and the exemptions explicitly exclude personal information and important data.

Selection Criteria and Decision

Choosing between China-hosted and overseas cloud for your China operations is fundamentally a compliance-first decision, with cost and performance as secondary considerations. Start with a data classification audit under PIPL and DSL.

• [guide: SLUG-TO-BE-FILLED] — Step-by-step guide to selecting a China cloud provider for foreign companies
• [comparison: SLUG-TO-BE-FILLED] — SCCs vs Security Assessment: which cross-border data route for your China business
• [tool: SLUG-TO-BE-FILLED] — Cloud cost estimator tool for foreign companies in China

China Cloud vs Overseas Cloud: Which Data Storage for Foreign Companies in China? — first published on China Gateway 360. Last updated: July 2026.

Official Sources

• Cyberspace Administration of China: Personal Information Protection Law
• Cyberspace Administration of China: official policy and regulatory portal
• National Information Security Standardization Technical Committee