Skip to main content

Security report for fonergy.cz

Fonergy s.r.o. · Energy · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

59/100

Risk levelMedium

0–100, higher is better. How it is calculated

Fonergy s.r.o. is a Czech energy supplier specializing in electricity and gas tariffs for households and businesses across the Czech Republic. The company emphasizes transparent pricing, customer-friendly online registration, and digital management of energy accounts via a mobile application. With over 20,000 customers and 12 years of market presence, Fonergy positions itself as a competitive and trusted energy provider offering additional services such as discounted internet TV packages. The website reflects a professional and modern digital presence with clear navigation, mobile optimization, and comprehensive customer support features. Technically, the site employs modern web technologies including Google Tag Manager, reCAPTCHA, and international telephone input libraries, ensuring a secure and user-friendly experience. Security posture is solid with HTTPS enforcement and form validation, though explicit security policies and incident response contacts are not publicly disclosed. The absence of WHOIS domain registration data is a notable gap, reducing full trust verification, but the overall business credibility remains high based on content and certifications. Strategic recommendations include enhancing transparency around security policies and domain registration details to further strengthen trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

7 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics

      What to do: Document all third-party data sharing in your privacy policy

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1

Need hands-on remediation? Email guard@offseq.com

Keep watching fonergy.cz

This scan found 19 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
72
Security headers
85
Email security
70
DNS health
80
Network security
20
GDPR outside view
25
Average
59

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention fonergy.cz, from OffSeq Breach.

Total records
293
Employees
0
Customers
293
Third parties
0
Weak passwords
30%

4 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for fonergy.cz.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Fonergy operates in the energy sector, targeting residential and commercial customers in the Czech Republic. Its business model focuses on direct energy supply combined with digital customer engagement through online accounts and mobile apps. The company leverages competitive pricing and value-added services like TV packages to differentiate itself. Market positioning is supported by a solid customer base and positive ratings. The website indicates a mature digital ecosystem with integrated marketing and analytics tools. Partnerships with social responsibility organizations enhance brand trust. Growth potential lies in expanding digital services and improving transparency. No direct parent or subsidiary relationships were identified. The company maintains a consistent brand image and provides comprehensive customer support channels.

Security posture

The website demonstrates a good security baseline with HTTPS, Google reCAPTCHA integration, and client-side form validation. However, it lacks publicly available security policies, incident response contacts, and vulnerability disclosure mechanisms, which are important for mature security governance. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. Security headers are not explicitly visible but may be present at the server level. The absence of WHOIS data is a concern for domain legitimacy verification. Overall, the security posture is adequate for the business type but could be improved by publishing formal security documentation and establishing clear incident response channels.

Recommendations

  1. Publish a detailed security policy and incident response contact information on the website.
  2. Implement and document security headers such as HSTS, CSP, and X-Frame-Options explicitly.
  3. Establish a vulnerability disclosure program or provide a security.txt file to encourage responsible reporting.
  4. Clarify domain registration details or ensure WHOIS data is publicly accessible to improve trust.
  5. Continue enhancing privacy compliance and transparency around data collection and retention.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Fonergy s.r.o.
Description
Šetřete na energiích bez závazků. Dodáváme elektřinu a plyn po celé ČR transparentně. Přejděte na Fonergy a plaťte méně už do měsíce.
Key services
dodávka elektřiny, dodávka plynu, mobilní aplikace pro správu energií, internetová televize Telly se slevou
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, Google reCAPTCHA, intlTelInput, Swal2 (SweetAlert2), Google Fonts (Kanit)
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Google reCAPTCHA v3 integration
  • Form validation with client-side rules
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Cookie Script
Marketing tools
Cookie Script
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and no blocking detected
  2. WHOIS data is missing, which is unusual and reduces domain trust
  3. Website uses HTTPS and modern web technologies
  4. Privacy and cookie policies are present and GDPR compliant
  5. Contact information is clearly provided including phone, email, and contact form
  6. No security.txt or explicit security policy found
  7. No incident response or vulnerability disclosure information found
  8. Business appears to be a medium-sized energy supplier in Czech Republic
  9. Website is well designed, mobile optimized, and professionally maintained
Technical notes

Notes

The website uses a modern technology stack including Google Tag Manager for analytics and marketing, Google reCAPTCHA v3 for bot protection, and intlTelInput for international phone number input. The Kanit font is loaded from Google Fonts with unicode-range subsets for performance optimization. The site is mobile-optimized with responsive design and accessible navigation. Performance appears moderate with lazy loading of images and asynchronous script loading. No CMS or hosting provider information was detected. SEO is supported by proper meta tags, Open Graph tags, and hreflang attributes for Czech and English languages. Technical debt is minimal, but explicit documentation of security headers and server configurations would improve the technical maturity profile.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Reviews of this site

Share your experience with fonergy.cz. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review fonergy.cz.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.