Overview
Google Cloud Armor is Google's cloud-native web application firewall and DDoS protection service. Built on the same infrastructure that protects Google Search, YouTube, and Gmail, Cloud Armor leverages Google's massive global network to provide edge protection at unprecedented scale.
Cloud Armor integrates natively with Google Cloud Load Balancing, providing protection for applications deployed on Google Cloud Platform. The service offers pre-configured WAF rules based on OWASP standards, along with adaptive protection that uses machine learning to detect and mitigate sophisticated attacks.
A key differentiator is Cloud Armor's integration with reCAPTCHA Enterprise and Bot Management, allowing organizations to implement sophisticated bot detection and user verification challenges. This makes it particularly effective against credential stuffing and automated attacks.
Ratings Breakdown
Key Features
Pre-configured WAF Rules
Ready-to-use rule sets for OWASP Top 10, SQLi, XSS, and other common attacks.
Adaptive Protection
ML-powered automatic detection and mitigation of sophisticated L7 DDoS attacks.
Bot Management
Integration with reCAPTCHA Enterprise for advanced bot detection and challenge pages.
Rate Limiting
Flexible rate limiting based on IP, headers, or other request attributes.
Geo-Based Access Control
Allow or deny traffic based on geographic location of the request origin.
Named IP Lists
Block known malicious IPs using Google's threat intelligence or custom lists.
Pros & Cons
Pros
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Google-scale infrastructure
Protection backed by the same network infrastructure that defends Google's own services.
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Transparent pricing
Clear pay-per-use pricing makes cost estimation straightforward compared to enterprise WAFs.
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Adaptive protection
ML-powered attack detection automatically responds to novel attack patterns.
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reCAPTCHA integration
Native integration with reCAPTCHA Enterprise for sophisticated bot management.
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Strong compliance
Comprehensive compliance certifications including FedRAMP for government workloads.
Cons
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GCP-only
Can only protect applications behind Google Cloud Load Balancing.
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Limited to HTTP/S
WAF features only available for HTTP/S traffic, not raw TCP/UDP.
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Managed Protection is expensive
Advanced features require $3,000/month minimum commitment.
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Fewer managed rules than competitors
Pre-configured rule library is smaller than AWS WAF or Cloudflare.
Pricing
Pricing model: Pay-per-use (policies + rules + requests)
Standard (Small)
Small deployment with 1 policy and 10 rules
- 1 policy ($5/mo)
- 10 rules ($10/mo)
- Pre-configured WAF rules
- Standard DDoS protection
Standard (Medium)
Medium deployment with 2 policies and 25 rules
- 2 policies ($10/mo)
- 25 rules ($25/mo)
- Rate limiting
- Adaptive protection preview
Plus (Managed Protection)
Enterprise-grade DDoS and WAF protection
- Everything in Standard
- Adaptive protection
- DDoS response team
- 100 protected resources included
Enterprise
Full enterprise security suite
- Everything in Plus
- Bot management
- reCAPTCHA integration
- Premium support
Our Verdict
Google Cloud Armor is the natural choice for applications running on Google Cloud Platform. Its integration with GCP load balancing, clear pricing model, and Google-scale infrastructure make it compelling for GCP-native deployments.
The adaptive protection feature using machine learning is a standout, providing automatic defense against sophisticated attacks without manual rule tuning. Combined with reCAPTCHA integration, it's particularly effective against automated threats.
Our verdict: Best WAF for GCP-native applications. Excellent value at the Standard tier; consider Managed Protection Plus for high-value targets.
CVE Coverage
Google Cloud Armor can detect and block attacks matching 90K+ known CVEs based on its supported rule sets.
Coverage by Attack Type
Latest Blockable CVEs
| CVE | Severity |
|---|---|
| CVE-2026-6606 | HIGH |
| CVE-2026-6605 | HIGH |
| CVE-2026-6604 | HIGH |
| CVE-2026-6603 | HIGH |
| CVE-2026-6602 | HIGH |
| CVE-2026-6600 | LOW |
| CVE-2026-32963 | UNKNOWN |
| CVE-2026-6596 | HIGH |
| CVE-2026-6595 | HIGH |
| CVE-2026-6594 | HIGH |
Frequently Asked Questions
Can Google Cloud Armor protect applications not on GCP?
Not directly. Cloud Armor only works with Google Cloud Load Balancing. However, you can route external application traffic through a GCP load balancer to gain protection, though this adds complexity and may introduce latency depending on your application's location.
What's the difference between Standard and Managed Protection Plus?
Standard provides basic WAF and DDoS protection. Managed Protection Plus adds adaptive protection (ML-based attack detection), access to Google's DDoS response team, and enhanced attack analytics. Plus is worth it for high-value applications facing sophisticated threats.
How does Cloud Armor pricing compare to AWS WAF?
Both use pay-per-use pricing. AWS WAF charges $5/Web ACL + $1/rule + $0.60/million requests. Cloud Armor charges $5/policy + $1/rule + $0.75/million requests. At scale, AWS WAF is slightly cheaper per request, but Cloud Armor's adaptive protection may reduce rule complexity and operational costs.
Ready to try Google Cloud Armor?
Visit the website to learn more or request a demo.