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Security report for clickhouse.com

ClickHouse, Inc. · Technology · United States

Medium risk. 3 critical or high findings in GDPR outside view.

Security score

68/100

Risk levelMedium

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

ClickHouse, Inc. operates a leading open-source column-oriented OLAP database management system designed for real-time analytical data processing using SQL queries. The company offers both open-source software and managed cloud services across major cloud platforms including AWS, GCP, and Azure. Their market position is strong, supported by a large developer community and enterprise customers such as Meta, Microsoft, and Spotify. The website demonstrates excellent content quality, professional design, and comprehensive resources targeting developers and enterprises requiring scalable real-time analytics solutions. Technically, the site uses modern frameworks like Next.js and React, with Cloudflare CDN for hosting and performance optimization. Security headers are well implemented, but the SSL/TLS configuration is currently inadequate, lacking valid certificates and modern protocols. Privacy and cookie policies are present with consent mechanisms, supporting GDPR compliance. Contact information is primarily via forms, with no direct emails or phone numbers publicly listed. Overall, the website is professional and trustworthy but should improve SSL/TLS security to enhance user trust and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

3 findings rated critical or high. Fix these first.

  1. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • 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

    • High

      Third-party services without privacy policy

      Detected services: Twitter, LinkedIn, Cloudflare

      What to do: Document all third-party data sharing in your privacy policy

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

Keep watching clickhouse.com

This scan found 12 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
50
Security headers
75
Email security
50
DNS health
90
Network security
100
GDPR outside view
40
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

ClickHouse is positioned as a technology leader in the OLAP database market, leveraging an open-source model combined with cloud managed services. Their business model includes free open-source software and paid cloud offerings, targeting enterprises and developers needing fast, scalable analytics. The company has a broad partnership ecosystem with major cloud providers and integrates with numerous third-party tools for data ingestion and visualization. Growth indicators include a large GitHub community, extensive customer logos, and active content marketing. The company emphasizes developer friendliness, cost efficiency, and resource optimization, appealing to sectors like financial services, marketing, gaming, and observability. Strategic observations highlight strong brand consistency, extensive integrations, and a focus on cloud deployment flexibility.

Security posture

The website exhibits a moderate security maturity level with several best practices in place, including a strict Content Security Policy, X-Frame-Options, and X-XSS-Protection headers. However, the SSL/TLS configuration is invalid, with no active TLS protocols or valid certificates detected, which is a critical security gap. No known vulnerabilities like Heartbleed or POODLE are present. The absence of OCSP stapling and session resumption reduces SSL performance and security. Privacy policies and cookie consent mechanisms are implemented, indicating compliance awareness. Incident response and vulnerability disclosure information are not publicly available, which could be improved to enhance transparency and trust. Overall, the security posture is adequate but requires urgent SSL/TLS improvements and enhanced incident response visibility.

Recommendations

  1. Obtain and deploy a valid SSL/TLS certificate supporting TLS 1.2 or TLS 1.3 to secure all site traffic.
  2. Enable and configure HTTP Strict Transport Security (HSTS) with a positive max-age and preload directive.
  3. Implement OCSP stapling and session resumption to improve SSL performance and security.
  4. Publish clear incident response and vulnerability disclosure policies, including security contact emails.
  5. Regularly audit and update third-party scripts and dependencies to minimize security risks.
Technical notes

Notes

The website is built on a modern technology stack featuring Next.js and React, optimized for performance and SEO. Hosting is via Cloudflare CDN, providing fast content delivery and DNS resolution. The site is mobile-optimized with good accessibility features. Analytics and marketing tools include Segment, Google Analytics, Marketo, and Drift, supporting extensive user tracking and marketing automation. The site integrates with numerous external services for functionality and analytics. Performance is fast, with well-structured content and clear navigation. Technical risks include the invalid SSL certificate and lack of advanced SSL features, which could impact user trust and search rankings if not addressed.
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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