ModSecurity vs Cloudflare
A detailed comparison to help you choose between ModSecurity and Cloudflare.
Quick Verdict
4.0/5
ModSecurity
250 reviews
4.4/5
Cloudflare
122 reviews
Cloudflare is rated higher (4.4 vs 4.0). ModSecurity is a free WAF engine that detects and blocks malicious HTTP requests. Operates as a module for major web servers to protect against OWASP Top 10 attacks and custom threats. Cloudflare provides distributed content delivery, DDoS mitigation, and R2 object storage. Designed for developers and enterprises needing reliable infrastructure with minimal latency.
ModSecurity Open-source web application firewall for Apache, Nginx, and IIS | Cloudflare Global CDN and DDoS protection with object storage | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (250 reviews) | 4.4 (122 reviews)✓ |
| Pricing model | free | freemium |
| Starting price | Free | Free tier available |
| Best for | DevOps teams and system administrators running self-managed web servers who need application-layer protection without managed WAF costs. | Teams building web applications requiring global distribution, DDoS protection, and cost-efficient object storage without egress fees. |
| Specifications (entry plan) | ||
| CPU cores | — | 0 vCPU |
| RAM | — | 0 GB |
| Storage | — | 0 GB |
| Bandwidth | — | 0 TB/mo |
| SLA uptime | — | 99.99% |
| Data-center count | — | 300 |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ✓ | |
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ✓ | |
| Data-center locations | ||
| Regions | — | Global — 300+ cities |
| Tags | ||
| Tags | free tieropen sourceself hostable | free tiers3 compatibleddos protectioneu datacenterus datacenterapac datacenterapi accessipv6terraform provider |
| Visit ModSecurity → | Visit Cloudflare → | |
ModSecurity
Pros
- + Deploy on-premises with full control and visibility
- + Use industry-standard OWASP Core Rule Set or create custom rules
- + Inspect request/response payloads, headers, and cookies in real-time
- + Free and open-source with active community support
Cons
- - Requires server-level integration and maintenance expertise
- - Rule tuning needed to avoid false positives in production
- - No built-in DDoS rate-limiting or volumetric attack mitigation
Cloudflare
Pros
- + Remove egress fees with R2 object storage pricing model
- + Deploy content globally with automatic edge caching
- + Mitigate DDoS attacks with Anycast network
- + Integrate security and performance in one platform
Cons
- - R2 has limited regional availability compared to AWS S3
- - Steeper learning curve for complex configuration options
- - Egress costs still apply for some traffic patterns outside R2
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