Skip to main content

Security report for zulu5.com

audienzz AG · Media · Switzerland

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

66/100

Risk levelMedium

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

Zulu5 is a Swiss-based digital advertising intelligence platform developed by audienzz AG, offering market analysis and brand safety solutions to advertisers, agencies, publishers, and adtech companies. The platform provides access to a global database of ad campaigns, enabling users to analyze, compare, and safeguard digital campaigns with features like custom alerts, historical data access, and brand safety monitoring. The website demonstrates a professional and consistent brand presence with comprehensive content and client testimonials, positioning itself as a trusted player in the media and technology sectors. Technically, the website employs modern JavaScript libraries and analytics tools such as Google Tag Manager, Google Optimize, Lucky Orange, and LinkedIn Insight Tag, indicating a mature digital infrastructure. The site is mobile-optimized with good SEO practices and moderate performance. Security measures include HTTPS enforcement and CSRF tokens in forms, though explicit security headers and incident response policies are not publicly documented. The security posture is generally strong, with no visible vulnerabilities or exposed sensitive data. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms aligned with GDPR requirements. However, the absence of WHOIS registration data for the domain raises concerns about domain legitimacy and registration transparency, which impacts the overall trust score. Overall, Zulu5 presents a credible and professional digital presence with robust business and technical foundations. The main risk lies in the lack of publicly available domain registration data, which should be investigated further to ensure full legitimacy and trustworthiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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

5 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 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. GDPR outside view

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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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 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 zulu5.com

This scan found 23 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
75
Security headers
30
Email security
60
DNS health
80
Network security
100
GDPR outside view
53
Average
66

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

Zulu5 operates in the digital advertising intelligence market, targeting advertisers, agencies, publishers, and adtech firms seeking transparency and safety in online campaigns. Its competitive advantage lies in providing a comprehensive database of ad campaigns with real-time insights, historical data, and brand safety tools. The business model is SaaS-based with demo and subscription offerings. The company leverages partnerships with reputable brands like NZZ and audienzz AG, enhancing market credibility. Growth indicators include multi-language support, extensive client logos, and testimonials. The platform's integration of advanced analytics and alerting features positions it well for continued expansion in the media intelligence sector.

Security posture

Zulu5 demonstrates a mature security posture with HTTPS enforced site-wide and CSRF protection on forms. The presence of privacy and cookie policies with consent mechanisms indicates compliance with GDPR. However, the lack of explicit security headers such as Content-Security-Policy and absence of published incident response or vulnerability disclosure policies represent gaps. No vulnerabilities or exposed sensitive data were detected in the analysis. The missing WHOIS data for the domain is a notable concern, potentially indicating privacy protection or registration issues. Overall, the security maturity is good but could be improved by publishing security policies and enhancing HTTP security headers.

Recommendations

  1. Implement and publish a security.txt file and vulnerability disclosure policy to improve transparency and incident response readiness.
  2. Add and enforce HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-XSS-Protection to enhance protection against common web attacks.
  3. Investigate and resolve the missing WHOIS registration data to ensure domain legitimacy and improve trustworthiness.
  4. Publish explicit security and incident response policies on the website to demonstrate security culture and preparedness.
  5. Continue monitoring and optimizing privacy compliance, including clear data retention policies and user data management.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
audienzz AG
Description
Zulu5 offers digital advertising market analysis and brand safety solutions, enabling users to analyze, compare, and safeguard digital campaigns with access to a global database of ads and live insights.
Key services
Ad campaign search and analysis, Market comparison and insights, Brand safety and ad fraud detection, Custom alerts and reporting, Historical ad campaign data access
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery, Google Tag Manager, Google Optimize, Lucky Orange, LinkedIn Insight Tag, Slick Carousel, Masonry, ImagesLoaded
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • CSRF tokens present in forms

Analytics and tracking

Services
Google Tag Manager, Google Optimize, Lucky Orange, LinkedIn Insight
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Lucky Orange, LinkedIn Insight, Google Optimize
Marketing tools
Google Optimize, Lucky Orange
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. Professional and consistent branding aligned with audienzz AG and NZZ.
  3. Comprehensive privacy and cookie policies with consent mechanisms implemented.
  4. Multiple client testimonials and trusted brand logos displayed.
  5. No direct company contact emails or phone numbers publicly listed; contact via forms only.
  6. No explicit security or incident response policies published.
  7. WHOIS data missing, which is unusual and warrants further investigation.
  8. Use of modern analytics and marketing tools with moderate user tracking.
  9. No adult or questionable content detected; content is business and technology focused.
Technical notes

Notes

The website uses a modern tech stack including jQuery, Slick Carousel, Masonry, and ImagesLoaded for UI components, alongside Google Tag Manager, Google Optimize, Lucky Orange, and LinkedIn Insight for analytics and marketing. The site is well-structured with proper meta tags, Open Graph data, and multi-language support. Performance is moderate with deferred script loading and responsive design for mobile devices. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Technical risks are minimal, but the absence of some security headers and WHOIS data represent areas for improvement.
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 zulu5.com. 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 zulu5.com.

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.