Is check24.es Safe? Security Analysis for CHECK24 Comparador S.L.U.
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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
CHECK24.es is the Spanish branch of CHECK24, Europe's largest price comparison platform founded in 1999 in Germany. The company offers a wide range of comparison services including car insurance, hotel bookings, car rentals, and other insurance products. It serves millions of customers seeking transparent, objective, and expert-assisted price comparisons to save time and money. The website is professionally designed, mobile-optimized, and integrates advanced tracking and analytics tools while maintaining strong privacy compliance with GDPR. Contact options and customer support are clearly presented, enhancing user trust. The absence of publicly accessible WHOIS data is due to registry restrictions for .es domains and does not detract from the site's legitimacy. Overall, CHECK24.es demonstrates a mature digital presence with robust business and technical infrastructure.
Detected Technologies
10 urgent findings need attention
10 high
- + 2 more findings in the full report below
Keep check24.es 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
2 findings
83/100
NIS2 Compliance
9 findings
2/100
Email Security
2 findings
87/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
CHECK24 holds a strong market position as a leading price comparison service in Europe, leveraging a commission-based business model. Its competitive advantage lies in offering expert recommendations, transparent pricing, and a broad portfolio of services. The company targets consumers in Spain and Europe who seek efficient ways to compare and purchase insurance, travel, and financial products. The platform's integration of customer reviews and a points program fosters loyalty and engagement. Partnerships with major insurance providers, hotel portals, and car rental companies underpin its extensive offerings. The business shows indicators of scale and maturity, with a large user base and consistent branding across multiple service domains.
Security Posture Analysis
Comprehensive Security Assessment
The website employs HTTPS with strong SSL configuration and implements a comprehensive cookie consent mechanism that respects user privacy and GDPR requirements. Security best practices such as secure login forms, delayed loading of tracking scripts, and absence of exposed sensitive data are observed. However, explicit security headers like Content-Security-Policy and X-Frame-Options are not visibly confirmed and should be audited. There is no public incident response or vulnerability disclosure policy found, which could be improved for transparency. Overall, the security posture is strong with minor areas for enhancement to align with best practices and compliance frameworks.
Strategic Recommendations
Priority Actions for Security Improvement
Conduct a security headers audit and implement missing headers such as Content-Security-Policy and X-Frame-Options.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
CHECK24 Comparador S.L.U.
CHECK24 es el comparador de precios más grande de Europa, nacido en Alemania en 1999. Ofrece comparadores para más de 70 categorías de productos y servicios, incluyendo seguros, hoteles, coches de alquiler, tarjetas de crédito, energía y telefonía. Más de 20 millones de clientes usan sus servicios para ahorrar tiempo y dinero con ayuda de expertos.
excellent
consistent
Technical Stack
moderate
good
good
good
Security Assessment
- HTTPS enforced
- Cookie consent banner with granular controls
- No exposed sensitive data in HTML
- Secure login forms with social login integration
- Use of Google Tag Manager with delayed loading
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with rich content and interactive 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, digital
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
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
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
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
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 check24.es compare?
See how check24.es 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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