What Is 360.cn
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Last updated: April 15, 2026
Key Facts
- Qihoo 360 was founded in 2005 by Zhou Hongyi
- 360.cn attracts over 500 million monthly active users
- The company launched 360 Search in 2012
- 360 Safe Guard protects over 400 million devices
- Qihoo 360 went public on the NYSE in 2011 before delisting in 2015
Overview
360.cn is the official website of Qihoo 360 Technology Co. Ltd., a major Chinese internet security and technology firm headquartered in Beijing. The company has grown into one of China’s most influential tech players, offering a broad suite of free and premium digital services.
Initially focused on antivirus software, 360.cn has expanded into web browsing, mobile security, cloud storage, and artificial intelligence. Its business model relies heavily on advertising and value-added services supported by a massive user base across China.
- Founded in 2005 by internet entrepreneur Zhou Hongyi, Qihoo 360 began as a provider of free antivirus tools to challenge established Western security software.
- 360 Safe Guard is one of the most widely used PC protection tools in China, with over 400 million devices protected as of 2023.
- The company launched 360 Search in 2012, which quickly captured 25% of China’s search engine market within a year of release.
- Monthly active users on 360.cn and affiliated platforms exceed 500 million, making it one of the largest digital ecosystems in Asia.
- Qihoo 360 delisted from the NYSE in 2015 in a $9.3 billion buyout, one of the largest tech privatizations in Chinese history.
How It Works
360.cn operates through a freemium model that combines free security tools with monetized services such as advertising, browser toolbars, and cloud storage.
- Free Antivirus Engine: The 360 Antivirus software uses cloud-based threat detection and real-time updates to identify malware, with a reported 99.1% detection rate in independent tests.
- 360 Secure Browser: Built on the Chromium engine, it supports over 100,000 extensions and integrates phishing protection and download scanning.
- 360 Search (Haosou): Launched as a competitor to Baidu, it processes over 1.2 billion searches per month and powers results for multiple third-party sites.
- Mobile Security Suite: The 360 Mobile Guard app offers antivirus scanning, junk file cleanup, and call blocking for over 300 million Android users.
- AI-Powered Threat Analysis: 360.cn uses machine learning to analyze over 200 million new malware samples annually, updating defenses in real time.
- Cloud Infrastructure: The company operates 12 data centers across China, supporting encrypted storage and synchronized user profiles.
Comparison at a Glance
Below is a comparison of 360.cn’s core services against leading competitors in China’s tech market:
| Feature | 360.cn | Baidu | Tencent | Alibaba |
|---|---|---|---|---|
| Primary Focus | Internet security, search, browser | Search, AI, advertising | Social media, gaming | E-commerce, cloud |
| Monthly Active Users | 500 million+ | 1.1 billion | 1.3 billion | 1.0 billion |
| Search Engine Market Share (2023) | 25% | 65% | 5% | N/A |
| Antivirus Reach | 400 million devices | 50 million | 300 million (via Tencent PC Manager) | 20 million |
| Founded | 2005 | 2000 | 1998 | 1999 |
While Baidu dominates search and Alibaba leads in e-commerce, 360.cn maintains a strong niche in cybersecurity and browser-based services. Its integration of security tools with search and cloud features differentiates it from broader tech conglomerates.
Why It Matters
360.cn plays a critical role in China’s digital infrastructure, particularly in protecting users from cyber threats and shaping online behavior through its browser and search tools.
- National cybersecurity initiatives have partnered with 360.cn to combat phishing, ransomware, and state-sponsored hacking attempts.
- The company’s 360 Threat Intelligence Platform monitors over 7,000 cyberattack groups and shares data with government agencies.
- 360.cn’s browser has been adopted by over 40% of Chinese enterprises for internal network protection and monitoring.
- Its AI research division has filed over 10,000 patents related to deep learning and malware detection since 2015.
- The platform supports 150 million daily downloads of software updates, patches, and security tools from its app store.
- 360.cn contributes to internet censorship compliance by filtering banned content in alignment with Chinese regulations.
As cyber threats grow more sophisticated, 360.cn remains a key player in securing China’s digital population while navigating complex regulatory and competitive landscapes.
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Sources
- WikipediaCC-BY-SA-4.0
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