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Security report for opusenergy.com

Opus Energy · Energy · United Kingdom

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

74/100

Risk levelMedium

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

Opus Energy is a well-established UK-based energy supplier specializing in renewable electricity for business customers, including SMEs and larger enterprises. Founded in 2002 and operating under the parent company Drax, it serves over 23,000 UK premises with a focus on sustainability and smart energy solutions. The website reflects a professional and consistent brand image, with clear navigation and relevant content tailored to its target audience. The business model centers on supplying renewable energy and supporting customers with smart meter installations and energy generation income opportunities. Technically, the website employs a modern technology stack including JavaScript frameworks, analytics tools like Google Analytics and Hotjar, and search functionality powered by Algolia. The site is mobile-optimized and SEO-friendly, though accessibility features could be enhanced. Performance is moderate with asynchronous loading of scripts to improve user experience. From a security perspective, the site uses HTTPS with no detected SSL issues and avoids exposing sensitive data. However, it lacks explicit security headers and does not publicly disclose a security policy or incident response plan. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms in place. Contact information is available primarily via phone and contact forms, but no direct company emails are exposed. Overall, the website presents a high level of business credibility and trustworthiness, supported by parent company association and customer review integrations. The security posture is solid but could be improved with additional headers and transparency around incident response. The site is not blocked by WAF or security challenges, allowing full content access and analysis.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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 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. GDPR outside view

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

    • 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

  3. 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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching opusenergy.com

This scan found 21 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.

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Full report

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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
77
Security headers
50
Email security
70
DNS health
80
Network security
100
GDPR outside view
68
Average
74

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

Technical appendix

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

Business context

Business profile

Opus Energy holds a strong market position as a renewable energy supplier to UK businesses, leveraging its parent company Drax's resources. Its competitive advantage lies in its renewable energy sourcing, smart meter services, and customer support portals. The business model is B2B focused, targeting SMEs and larger enterprises seeking sustainable energy solutions. Revenue streams include energy supply contracts and services related to energy generation and smart meter installations. The company demonstrates growth through a large customer base and strategic partnerships. The website ecosystem includes integrations with review platforms and marketing tools, reflecting a mature digital presence.

Security posture

The website exhibits a mature security posture with enforced HTTPS and no visible exposure of sensitive data. The use of asynchronous loading for third-party scripts reduces performance impact but requires ongoing monitoring for vulnerabilities. The absence of security headers and public incident response information represents a compliance gap. No vulnerability disclosure or security.txt file is present, limiting transparency for security researchers. Privacy policies and cookie consent mechanisms align with GDPR requirements, indicating good data protection practices. Overall, the security maturity is good but could benefit from enhanced transparency and technical controls.

Recommendations

  1. Implement HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-XSS-Protection to strengthen browser security.
  2. Publish a dedicated security policy and incident response page to improve transparency and customer trust.
  3. Add a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  4. Enhance accessibility features to meet WCAG standards and improve inclusivity.
  5. Regularly audit and update third-party scripts and tracking tools to mitigate potential vulnerabilities.

Contact details published on the site

Legal name
Opus Energy Limited
Registration number
04382246
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Opus Energy
Description
Opus Energy provides competitive business energy to SMEs and larger businesses across the UK, specializing in renewable source electricity including solar, wind, hydro and anaerobic digestion.
Key services
Business electricity supply, Renewable energy sourcing, Smart meter installation and resources, Energy generation income services
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Modernizr, Algolia search, Google Tag Manager, Google Analytics, Hotjar, Trustpilot widget, Maxymiser, Qualtrics
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of security-related scripts asynchronously

Analytics and tracking

Services
Google Analytics, Hotjar, Google Tag Manager
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Ads, Twitter Ads, DoubleClick
Tracking pixels
Hotjar, Twitter, Facebook Pixel, LinkedIn Insight Tag
Marketing tools
Qualtrics
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed with clear navigation and good content quality
  2. Strong focus on renewable energy for business customers in the UK
  3. Use of multiple third-party analytics and marketing tools with consent mechanisms
  4. No visible security policy or incident response information publicly available
  5. No security.txt or vulnerability disclosure found
  6. Contact information is available but no direct emails found in HTML
  7. Parent company Drax is prominently referenced, adding trust
  8. Website uses HTTPS with no detected SSL issues
  9. No WAF or blocking mechanisms detected
Technical notes

Notes

The website uses a custom CMS (CSG 1.0.2) and modern JavaScript libraries including Modernizr for feature detection and Algolia for search functionality. Analytics and marketing integrations include Google Tag Manager, Google Analytics, Hotjar, Twitter Ads, Facebook Pixel, LinkedIn Insight Tag, and Qualtrics for surveys. The site is optimized for mobile devices with responsive images and CSS. Performance is moderate, with asynchronous script loading and preconnect hints to external domains. No major technical debt or deprecated technologies were detected. Hosting provider details are not explicitly disclosed. SEO is supported by proper meta tags, Open Graph, and Twitter card metadata. Accessibility is basic but could be improved.
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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