Is 81.cz Safe? Security Analysis for 81
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GDPR-aligned
Data handling
EU
Hosting region
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81.cz is a Czech-based company specializing in energy-related services including air conditioning, heat pumps, photovoltaic power plants, electronic security systems, and real estate rental. The company operates multiple branches across major Czech cities such as Prague, Brno, Ostrava, Hradec Králové, and Plzeň, supported by strong customer reviews on Google and Firmy.cz. Their business model leverages EU-funded projects to promote sustainable energy solutions, positioning them as a reputable regional player in the energy and real estate sectors. Technically, the website employs modern web technologies including Google Tag Manager, Google reCAPTCHA, Google Maps API, and popular JavaScript libraries like jQuery and Parsley.js. The site is mobile-optimized with good design quality and user experience. However, it lacks explicit privacy and cookie policies, and no security headers are detected, which are areas for improvement. The site uses HTTPS with a presumably strong SSL configuration, enhancing security. From a security perspective, the site shows good practices such as HTTPS enforcement and bot protection via reCAPTCHA, but lacks comprehensive security headers and incident response information. The absence of WHOIS data reduces domain trust slightly, but the presence of verified customer reviews and EU project disclosures supports legitimacy. No vulnerabilities or exposed sensitive data were detected. Overall, the website is professional and trustworthy with moderate technical maturity and security posture. Strategic improvements in privacy compliance, security headers, and transparency around incident response would enhance their security and compliance standing.
Detected Technologies
14 urgent findings need attention
1 critical · 13 high
- + 6 more findings in the full report below
Keep 81.cz 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
6 findings
40/100
GDPR Compliance
5 findings
10/100
NIS2 Compliance
9 findings
2/100
Email Security
6 findings
60/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
81.cz holds a solid market position in the Czech Republic's energy and real estate sectors, targeting residential and commercial customers seeking climate control, renewable energy, and property rental services. Their competitive advantage lies in diversified service offerings under a unified brand and leveraging EU funding for sustainable projects. The company’s multiple regional branches and positive online reviews indicate strong local presence and customer trust. Revenue streams likely include service contracts, equipment sales, and property rentals. The absence of detailed company registration data limits deeper insights, but the brand consistency and external domain network suggest a well-structured business ecosystem.
Security Posture Analysis
Comprehensive Security Assessment
The current security maturity level is moderate. The website enforces HTTPS and uses Google reCAPTCHA to mitigate automated abuse. However, the lack of security headers such as Content-Security-Policy and X-Frame-Options reduces defense-in-depth. No vulnerability disclosures or incident response contacts are published, indicating gaps in security transparency. GDPR compliance is not clearly demonstrated due to missing privacy and cookie policies. The site does not expose sensitive data or use vulnerable libraries based on available information. Overall, the security culture appears functional but could benefit from formalized policies and enhanced technical controls.
Strategic Recommendations
Priority Actions for Security Improvement
Implement and publish a comprehensive privacy policy and cookie consent mechanism to improve GDPR compliance.
✨Observations
Comprehensive website and business-context analysis.
AI-Enhanced Website Analysis
Business Insights
81
81 is a Czech company offering services in climate control, heat pumps, photovoltaic power plants, electronic security systems, and real estate rental. They emphasize reliability and customer service with verified client reviews across multiple Czech cities.
good
consistent
Technical Stack
moderate
good
basic
basic
Security Assessment
- HTTPS enforced
- Use of Google reCAPTCHA for bot protection
- Google Tag Manager for controlled script loading
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with no blocking or WAF challenge.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing X-Frame-Options header
Prevents clickjacking attacks
Missing Content-Security-Policy header
Controls resources the browser is allowed to load
Missing X-XSS-Protection header
Legacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
Controls referrer information sent with requests
Missing Permissions-Policy header
Controls browser features and APIs
Sensitive data may be cached
Cache-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 Privacy Policy found
GDPR requires a clear and accessible privacy policy
No Cookie Policy found
GDPR requires clear information about cookie usage
No Cookie Consent Banner found
GDPR requires explicit consent for non-essential cookies
EU business without adequate privacy measures
EU businesses are subject to strict GDPR requirements
Third-party services without privacy policy
Detected services: Google Analytics, Google APIs
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
NIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
NIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
NIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
NIS2 requires documented incident response and business continuity plans
No business continuity planning found
NIS2 emphasizes operational resilience and business continuity
No security contact information
NIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
Clear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
Consider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
Detected 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
DMARC not enforcing
DMARC policy is set to "none"
No DKIM record found
DKIM adds cryptographic signatures to emails
Strict DMARC Alignment
Strict alignment may cause legitimate emails to fail
No BIMI Record
BIMI displays brand logos in email clients
No MTA-STS Policy
MTA-STS enforces TLS for email delivery
No TLS-RPT Record
TLS-RPT provides reporting for email TLS issues
SPF Details
DMARC Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
Server supports weak protocols: TLSv1.1
Certificate Transparency Not Implemented
Certificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
SSL certificate expires in 89 days
Weak SSL Key Length
SSL certificate uses 256-bit key, which is considered weak
Partial SSL/TLS Assessment
Completed 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
DNSSEC is not configured for this domain
DMARC Policy Set to None
DMARC is configured but not enforcing any policy
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
No unnecessary services detected on common risky ports
How does 81.cz compare?
See how 81.cz 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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