Is caddyserver.com Safe? Security Analysis for ZeroSSL
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
Caddyserver.com represents the official website for Caddy, an advanced open source web server developed in Go, specializing in automatic HTTPS and TLS certificate management. The project is backed by ZeroSSL and enjoys sponsorship from prominent technology companies such as Stripe and Mercedes-Benz. The website targets developers, enterprises, and SaaS providers seeking secure, scalable, and reliable web server solutions. It offers a modular, extensible platform with features including internal PKI management, reverse proxy capabilities, and PHP application hosting via FrankenPHP. The site demonstrates a high level of technical maturity with modern web technologies, fast performance, and excellent mobile optimization. Security is a core focus, with compliance to PCI, HIPAA, and NIST standards, automatic certificate renewal, and advanced TLS features. However, the site lacks explicit privacy and cookie policies, as well as direct contact information, which are areas for improvement in compliance and user trust. Overall, the website is professional, trustworthy, and well-positioned in the technology market.
Detected Technologies
10 urgent findings need attention
10 high
- + 2 more findings in the full report below
Keep caddyserver.com under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
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Security Headers
8 findings
15/100
GDPR Compliance
3 findings
58/100
NIS2 Compliance
8 findings
17/100
Email Security
4 findings
85/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
Caddy operates as an essential technology entity within the web server and security infrastructure sector. Its open source business model is supported by sponsorships and enterprise services, enabling sustainable development and innovation. The project has a strong competitive advantage due to its automatic HTTPS capabilities, modular architecture, and compliance with major security standards. The target customer segments include developers, SaaS companies, and enterprises requiring scalable and secure web infrastructure. The partnership ecosystem includes ZeroSSL and other industry leaders, enhancing credibility and reach. Growth indicators include extensive community engagement, academic citations, and adoption by high-profile sponsors. Strategic observations highlight the importance of expanding compliance documentation and enhancing direct communication channels to further solidify market trust.
Security Posture Analysis
Comprehensive Security Assessment
Caddy demonstrates a mature security posture with robust TLS management, automatic certificate issuance and renewal, and advanced features like OCSP stapling and cluster coordination. The use of Go, a memory-safe language, reduces common vulnerabilities. Compliance with PCI, HIPAA, and NIST frameworks is explicitly stated, indicating alignment with industry best practices. However, the absence of a published security policy, incident response contacts, and vulnerability disclosure mechanisms represents gaps in transparency and readiness. No vulnerabilities or exposed sensitive data were detected in the website content. The security score is high, but improvements in policy publication and contact availability would enhance incident response and trust.
Strategic Recommendations
Priority Actions for Security Improvement
Publish a comprehensive privacy policy and cookie policy with clear consent mechanisms to improve GDPR and privacy compliance.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
ZeroSSL
Caddy is a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go. It offers automatic TLS certificate management, internal PKI capabilities, and a modular architecture for extensibility.
excellent
consistent
Technical Stack
fast
excellent
good
good
Security Assessment
- Automatic HTTPS with certificate issuance and renewal
- OCSP stapling and caching
- On-Demand TLS for dynamic certificate provisioning
- Cluster coordination for certificate management
- Secure defaults meeting PCI, HIPAA, and NIST compliance
- Memory-safe language (Go) used for development
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with rich content and no blocking.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing Strict-Transport-Security header
HIGHForces HTTPS connections
Missing X-Frame-Options header
HIGHPrevents clickjacking attacks
Missing X-Content-Type-Options header
MEDIUMPrevents MIME type sniffing
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
LOWControls referrer information sent with requests
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
Sensitive data may be cached
LOWCache-Control header should include "no-store" for sensitive pages
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
Privacy policy may not be GDPR compliant
MEDIUMPrivacy policy lacks explicit GDPR compliance elements
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
Strict DMARC Alignment
LOWStrict alignment may cause legitimate emails to fail
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
SPF Details
DKIM Selectors Found
DMARC Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 87 days
Weak SSL Key Length
HIGHSSL certificate uses 256-bit key, which is considered weak
Partial SSL/TLS Assessment
LOWCompleted 2 of 4 security checks due to time constraints
Certificate Details
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
Domain Registration Details
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Service Exposed: SSH
MEDIUMPort 22 (SSH) is publicly accessible - SSH - Secure but can be brute-forced
How does caddyserver.com compare?
See how caddyserver.com stacks up against similar websites in the same industry.
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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PDF Report & Export
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Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.
SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
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