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Security report for jellyfish.com

Jellyfish Digital · Technology · United Kingdom

Low risk. 2 critical or high findings in Security headers and GDPR outside view.

Security score

83/100

Risk levelLow

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

Jellyfish Digital is a global digital marketing company founded in 2005 and headquartered in London, UK. The company specializes in combining media, creative, and data with Generative AI technologies to help brands accelerate and optimize their digital marketing efforts. With a strong global presence including offices across North America, Europe, Asia, and other regions, Jellyfish serves a broad range of enterprise clients seeking advanced marketing solutions. The website reflects a mature digital infrastructure leveraging modern frameworks such as Nuxt.js and Vue.js, integrated with marketing and analytics tools like Google Tag Manager and Vimeo for media delivery. The site is well-optimized for mobile and accessibility, with comprehensive SEO and structured data markup enhancing discoverability. Security posture is strong with HTTPS enforcement and appropriate security headers, though the absence of a dedicated security policy or incident response page suggests room for improvement. Privacy and cookie policies are present and indicate GDPR compliance. Overall, Jellyfish demonstrates a high level of professionalism, technical maturity, and business credibility, positioning it as a trusted leader in the digital marketing technology space.

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

2 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 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

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

Keep watching jellyfish.com

This scan found 14 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

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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
100
Security headers
60
Email security
85
DNS health
85
Network security
100
GDPR outside view
68
Average
83

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

Jellyfish operates in the technology and media sectors, focusing on digital marketing services enhanced by AI capabilities. Its business model centers on providing integrated marketing solutions combining media buying, creative content, and data analytics. The company targets large enterprises and brands looking to leverage AI for smarter marketing strategies. The extensive global office network supports localized service delivery and client engagement. Jellyfish's competitive advantage lies in its AI integration and comprehensive service offering, positioning it well in a competitive digital marketing landscape. The company maintains active social media channels and uses advanced web technologies, indicating a forward-looking digital strategy. No parent company or subsidiaries were identified, suggesting Jellyfish operates as an independent entity. The business shows strong growth indicators and a robust partnership ecosystem, though no explicit partner domains were found in the website content.

Security posture

Jellyfish exhibits a mature security posture with HTTPS enforced and multiple security headers implemented, including HSTS, CSP, and X-Frame-Options. The website does not expose sensitive data or vulnerable libraries in the HTML content. Forms appear secure with standard input fields, though no explicit mention of secure form handling or CAPTCHA was detected. The absence of a published security policy or incident response contact limits transparency in security governance. No vulnerability disclosure or security.txt file was found, which could be improved to enhance trust and facilitate responsible vulnerability reporting. Privacy policies are comprehensive and GDPR compliant, reflecting good data protection practices. Overall, the security posture is strong but could benefit from enhanced transparency and formalized incident response mechanisms.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and governance.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure policy or security.txt file.
  4. Enhance secure form handling with visible anti-bot measures or CAPTCHA where appropriate.
  5. Maintain and communicate data retention policies and privacy compliance updates.

Contact details published on the site

Addresses
Legal name
Jellyfishc
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Jellyfish Digital
Description
We are a global digital marketing business that combines media, creative, and data with the power of Generative AI, helping brands move faster and smarter in today's competitive digital landscape.
Key services
digital marketing, media buying and planning, creative services, data analytics, Generative AI-powered marketing solutions
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Vimeo Player, Google Tag Manager, HubSpot styled components, Nuxt.js
Frameworks
Nuxt.js, Vue.js
Platforms
Vimeo
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Secure forms with proper input fields

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
HubSpot
Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and well-structured
  2. Multiple global office locations listed with detailed addresses
  3. Clear business description and service offerings
  4. Use of modern web technologies and frameworks
  5. Strong SEO and accessibility practices
  6. No signs of malicious or suspicious activity
  7. No explicit security policy or incident response page found
  8. Privacy and cookie policies are present and comprehensive
Technical notes

Notes

The website is built using modern JavaScript frameworks Nuxt.js and Vue.js, indicating a server-side rendered and SEO-friendly architecture. Integration with Google Tag Manager and Vimeo supports analytics and rich media content delivery. The use of HubSpot styled components suggests a CMS or marketing platform integration. Performance is moderate with preloading of key scripts and fonts, and the site is highly optimized for mobile devices with responsive design and accessibility features. SEO is well addressed through meta tags, Open Graph, Twitter cards, and JSON-LD structured data. No major technical debt or outdated technologies were detected. Hosting provider details are not explicit but the infrastructure appears robust. Opportunities exist to improve technical transparency around security and compliance features.
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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