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Security report for reonic.de

Reonic GmbH · Energy · Germany

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

72/100

Risk levelMedium

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

Reonic GmbH is a medium-sized German company founded in 2017 specializing in SaaS solutions for the renewable energy sector, focusing on software to plan, sell, and install photovoltaic systems, heat pumps, energy storage, and wallboxes. The company serves installers, solar technicians, utilities, and both private and commercial customers, positioning itself as an all-in-one platform for the entire customer journey from lead generation to installation and documentation. The website reflects a mature digital presence with extensive marketing and analytics integrations, mobile app availability, and strong trust signals including customer testimonials and press coverage. Technically, the site is built on modern frameworks like Next.js, hosted with Cloudflare DNS, and optimized for performance and mobile use. Security posture is good with HTTPS enforced and domain registration consistent with business claims, though DNSSEC is not enabled and security headers are not explicitly detected. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Overall, the website and business demonstrate professionalism, credibility, and a strong market position in the renewable energy software space.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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

4 findings rated critical or high. Fix these first.

  1. 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
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching reonic.de

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.

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Recommended

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

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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
75
Security headers
30
Email security
70
DNS health
75
Network security
100
GDPR outside view
83
Average
72

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 reonic.de, from OffSeq Breach.

No leaked records found

Breach holds no records for reonic.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

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

Business context

Business profile

Reonic operates in the energy sector with a SaaS business model targeting installers and energy solution providers. Its competitive advantage lies in integrating multiple renewable energy components into a single software platform, streamlining workflows from sales to installation. The company has over 1500 customers and is recognized in industry media and associations, indicating solid market traction. Revenue streams likely include subscription fees for software access and possibly premium services. The presence of multiple office locations in Germany and the UK suggests international ambitions. Partnerships with fintech and industry players enhance its ecosystem. The company emphasizes user experience, flexibility, and comprehensive functionality to maintain competitive differentiation.

Security posture

The website demonstrates a good security maturity level with HTTPS enforced and domain registration transparency. However, the absence of DNSSEC and missing explicit security headers represent areas for improvement. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The lack of a published security policy or incident response contact limits transparency in security governance. Privacy policies and cookie consent mechanisms are well implemented, supporting GDPR compliance. Overall, the security posture is solid but could be enhanced by adopting additional DNS and HTTP security best practices and publishing formal security documentation.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS security and prevent spoofing.
  2. Implement and verify HTTP security headers such as Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and X-Content-Type-Options.
  3. Publish a dedicated security policy page and provide clear incident response contact information to improve transparency and trust.
  4. Consider adding a security.txt file at the root domain to facilitate responsible vulnerability disclosure.
  5. Regularly audit third-party scripts and tracking pixels to minimize privacy risks and ensure compliance with evolving regulations.

Contact details published on the site

Addresses
Legal name
Reonic GmbH
VAT number
DE342755511
Registration number
HRB 36147
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Reonic GmbH
Description
Die beste Software, um Photovoltaikanlagen und Wärmepumpen zu vertreiben und zu installieren. Vom ersten Kundenkontakt über Modulbelegung, Stringplanung, Heizlast, hydraulischer Abgleich, Angebotsstellung und digitale Unterschrift, bis zur Installationsvorbereitung, Durchführung und Dokumentation. Inklusive Projektmanagement, E-Mail und Kalender-Integration. Alles in einem.
Key services
Photovoltaik Planung und Vertrieb, Wärmepumpen Planung und Vertrieb, Speicher und Wallbox Integration, Projektmanagement und CRM Funktionen, Digitale Angebotsstellung und Unterschrift
Content quality
excellent
Branding
consistent

Technology

Stack
Next.js, React, Cloudflare DNS, HubSpot Analytics, TikTok Pixel, Facebook Pixel, Microsoft Clarity, Reddit Pixel, Albacross
Frameworks
Next.js
Platforms
Web, iOS App, Android App
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Domain status clientTransferProhibited
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

Analytics and tracking

Services
HubSpot Analytics, Google Analytics (via GTM), Microsoft Clarity, TikTok Analytics, Reddit Analytics
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
HubSpot Ads, TikTok Ads, Facebook Ads, Reddit Ads, Albacross
Tracking pixels
TikTok Pixel, Facebook Pixel, Reddit Pixel, Microsoft Clarity
Marketing tools
HubSpot Analytics, Microsoft Clarity
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 no blocking or WAF challenges.
  2. Content is comprehensive, professional, and well-structured.
  3. Strong presence of trust signals including customer testimonials and press mentions.
  4. Extensive use of third-party analytics and marketing pixels indicating mature digital marketing strategy.
  5. No explicit security policy or incident response information publicly available.
  6. No DNSSEC enabled, which is a minor security improvement opportunity.
  7. Multiple physical office locations in Germany and UK listed.
  8. Mobile apps available on iOS and Android platforms.
  9. Cookie consent mechanism implemented with clear options.
Technical notes

Notes

The website is built on a modern React/Next.js framework, leveraging server-side rendering and static export for performance. Hosting and DNS are managed via Cloudflare, providing CDN and security benefits. The site integrates multiple analytics and marketing tools including HubSpot, TikTok, Facebook, Reddit, Microsoft Clarity, and Google Tag Manager, indicating a sophisticated digital marketing infrastructure. Mobile optimization is excellent with dedicated iOS and Android apps. The site shows good SEO practices with appropriate meta tags and Open Graph data. No CMS is explicitly detected, suggesting a custom or headless CMS approach. Performance is fast with preloading of fonts and CSS. Accessibility is good but could be further improved with explicit ARIA roles and landmarks. Overall, the technical implementation supports a high-quality user experience and scalable platform.
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

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