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StopDDoS

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Stopddos is a cloud security service provider

ChinaCybersecurity
Valuation $100–250M Last recorded · 2018
Total funding $10–50M Disclosed equity funding
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About StopDDoS

StopDDoS, registered as Zhejiang Yunyun Cloud Computing, was a Taizhou-based entity founded in 2017 that provided cloud application security solutions before ceasing operations. The company secured $20 million in a Series A funding round in 2018, which was its sole funding event. The firm's objective was to offer a comprehensive security solution for websites.

The core of its business was centered on protecting web assets from a variety of cyber threats. It served clients in need of robust online security. The business model involved providing a suite of security products designed to defend against malicious traffic and online attacks, though specific pricing or subscription details are not publicly available.

StopDDoS's product portfolio included an Anti-D Cloud Web Application Firewall (WAF), the Yun Yu Game Shield, an anti-DDoS high-defense IP service, high-defense servers, and anti-hijacking SSL certificates. The Anti-D Cloud WAF was a notable product, utilizing a cloud-based FPGA chip-level engine. This system was engineered to defend against various Layer 3, Layer 4, and Layer 7 DDoS attacks by employing multiple recognition and cleaning algorithms. Furthermore, it integrated real-time threat intelligence and user behavior analysis to rapidly distinguish between legitimate and malicious traffic, while its anti-hijacking SSL certificates aimed to enhance website credibility and prevent data sniffing.

Source: Dealroom company data

At a glance

Status
Operational
Headquarters
China
Open positions
None listed
Dealroom signal
0.0/100
Industry
Security
Sector
Cybersecurity, Cloud Security
Business model
Marketplace & ecommerce
Client focus
b2b
Links
Website

Funding history

1 recorded event

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SERIES A✓Equity / VC Oct 2018 $20M $80M Undisclosed —
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Growth signals

StopDDoS website traffic

Latest recorded traffic for StopDDoS is 370 monthly website visits, up 23.3% over the last three months.

Latest monthly visits370 3-month web change+23.3%
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Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

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Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
🇨🇳 China HQ
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Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about StopDDoS on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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