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Security report for zellic.io

Zellic · Technology · N/a

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

68/100

Risk levelMedium

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

Zellic is a specialized security consulting firm focusing on securing emerging technologies, particularly in blockchain and cryptographic software. The company offers comprehensive security assessments, audits, and offensive security research services trusted by developers, founders, and investors. Their market position is strong, supported by client testimonials from reputable organizations and a reputation for deep technical expertise. Technically, the website is built on modern frameworks such as Alpine.js and Swiper.js, hosted on Cloudflare, and optimized for performance and mobile devices. Security posture is good with HTTPS enforced and no visible vulnerabilities, though improvements can be made by adding security headers and explicit cookie consent mechanisms. The lack of WHOIS data due to privacy protection is common for security firms and does not detract significantly from trustworthiness. Overall, Zellic presents a professional, trustworthy, and technically mature online presence.

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

6 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. 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

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

Keep watching zellic.io

This scan found 22 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

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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
15
Email security
85
DNS health
80
Network security
100
GDPR outside view
53
Average
68

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

Zellic operates in the technology sector, providing essential security services for emerging tech companies. Their business model centers on delivering high-quality security audits and research, leveraging a team with a background in top-tier hacking competitions. The company targets developers, founders, and investors in innovative technology fields, particularly blockchain. Their competitive advantage lies in their deep technical expertise and client engagement approach. Revenue streams likely come from consulting and auditing contracts. The company maintains a strong partnership ecosystem with notable clients but does not publicly disclose subsidiaries or parent companies. Growth indicators include active research publication and a visible commitment to community engagement.

Security posture

Zellic demonstrates a mature security posture with HTTPS enforced and no exposed sensitive data. However, the website lacks some security best practices such as security headers (CSP, HSTS, X-Frame-Options) and a public vulnerability disclosure policy. No incident response contacts or security policies are publicly available. The absence of cookie consent mechanisms despite tracking scripts indicates a gap in privacy compliance. Overall, the security culture appears strong internally, but public-facing security transparency could be improved to enhance trust and compliance.

Recommendations

  1. Implement and publish a comprehensive cookie policy with explicit consent mechanisms to comply with privacy regulations.
  2. Add security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options to improve website security posture.
  3. Publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  4. Provide clear incident response contact information, including security or abuse email addresses, to improve transparency and trust.
  5. Consider publishing terms of service to clarify legal relationships and user expectations.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Zellic
Description
Zellic specializes in securing emerging technologies. Developers, founders, and investors trust Zellic to ship quickly, confidently, and without critical vulnerabilities. They provide security assessments and offensive security research to find vulnerabilities others miss.
Key services
Security assessments, Security audits, Offensive security research, Formal verification, Static analysis, Fuzzing, Applied cryptography, Secure enclaves and trusted computing
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Alpine.js, Swiper.js, Google Tag Manager, Cloudflare Insights
Frameworks
Alpine.js
Platforms
Webflow CMS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

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

Analytics and tracking

Services
Google Tag Manager, Cloudflare Insights
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Cloudflare Insights
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 unavailable due to malformed response, indicating privacy protection or registry limitations.
  3. Strong focus on security services for emerging technologies including blockchain and cryptography.
  4. Multiple client testimonials from reputable companies enhance trust.
  5. No direct contact emails or phone numbers publicly listed; contact via form only.
  6. No explicit cookie consent mechanism found despite tracking scripts present.
  7. No terms of service page detected.
  8. No vulnerability disclosure or security.txt found.
  9. Website uses modern JavaScript frameworks and is hosted behind Cloudflare.
  10. No adult or questionable content detected; content is safe for general audiences.
Technical notes

Notes

The website is built using modern web technologies including Alpine.js for reactive components and Swiper.js for interactive sliders. It is hosted on Cloudflare, which provides CDN and security benefits. The site is optimized for mobile devices and performs well with fast loading times. The use of Webflow CMS enables efficient content management. No technical debt or outdated libraries were detected. Opportunities exist to enhance technical security by adding HTTP security headers and improving privacy compliance mechanisms.
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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