Is zerossl.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
ZeroSSL is a technology company specializing in providing free and automated SSL certificates to website owners, developers, and enterprises. The company positions itself as a trusted certificate authority with a strong market presence, supported by notable industry clients such as Microsoft, Intel, and Hubspot. Their services include SSL certificate issuance, monitoring, one-step validation, quick installation, and ACME automation, catering to a broad audience seeking reliable and fast SSL solutions. Founded in 2016, ZeroSSL has established a medium-sized operation with consistent branding and a professional online presence. Technically, the website leverages a modern technology stack including jQuery, Google Tag Manager, Google Analytics, and Cookiebot for cookie consent management. Hosting and DNS services are provided via Cloudflare, enhancing performance and security. The site demonstrates good mobile optimization, SEO practices, and basic accessibility features, though there is room for improvement in accessibility and security headers. From a security perspective, ZeroSSL enforces HTTPS and employs domain registration protections such as clientDeleteProhibited and clientTransferProhibited statuses. Cookie consent is managed comprehensively with granular user controls, reflecting good privacy compliance. However, DNSSEC is not enabled, and explicit security policies or incident response contacts are not publicly available, representing areas for enhancement. Overall, the website is professional, trustworthy, and secure, with no indications of malicious content or vulnerabilities. The domain registration details align well with the business claims, supporting legitimacy. Strategic recommendations include enabling DNSSEC, publishing a security.txt file, enhancing HTTP security headers, and providing clearer contact information for security incidents.
Detected Technologies
10 urgent findings need attention
10 high
- + 2 more findings in the full report below
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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
2 findings
83/100
NIS2 Compliance
9 findings
2/100
Email Security
1 finding
100/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
ZeroSSL operates in the competitive SSL certificate authority market, offering free and paid SSL certificates with automation capabilities. Their business model focuses on simplifying SSL management through REST APIs and ACME protocol support, targeting developers and enterprises. The company leverages partnerships and related domains to extend service offerings and support. Their market positioning is strengthened by endorsements from leading technology companies and a clear focus on ease of use and automation. Revenue streams likely include premium SSL certificates and enterprise services. Growth indicators include continuous feature additions and a robust partner ecosystem. Strategic observations highlight the importance of maintaining trust through transparent privacy practices and strong security postures.
Security Posture Analysis
Comprehensive Security Assessment
ZeroSSL demonstrates a mature security posture with enforced HTTPS, domain registration protections, and comprehensive cookie consent management. The use of Cookiebot ensures GDPR compliance and user privacy controls. However, the absence of DNSSEC and lack of published security policies or incident response contacts are notable gaps. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. The website uses modern analytics and marketing tools responsibly with transparent disclosures. Overall, the security culture appears proactive but could benefit from formalizing vulnerability disclosure processes and enhancing HTTP security headers.
Strategic Recommendations
Priority Actions for Security Improvement
Enable DNSSEC to strengthen DNS security and prevent spoofing.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
ZeroSSL
Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.
good
consistent
Technical Stack
moderate
good
basic
good
Security Assessment
- HTTPS enforced
- Domain status includes clientDeleteProhibited, clientRenewProhibited, clientTransferProhibited, clientUpdateProhibited
- Cookie consent with granular controls
- No DNSSEC enabled (recommend enabling)
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website offers free and paid SSL certificate services with automation features.
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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 Data Protection Officer mentioned
LOWLarge organizations may need to designate a DPO under GDPR
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
Critical sector without clear security compliance
HIGHDetected sectors: energy, transport, banking, digital
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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
SPF Details
DKIM Selectors Found
DMARC Details
MTA-STS Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 66 days
Weak SSL Key Length
HIGHSSL certificate uses 256-bit key, which is considered weak
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
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
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
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
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports
How does zerossl.com compare?
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🔧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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