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Security report for posthog.com

PostHog · Technology · N/a

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

Security score

71/100

Risk levelMedium

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

PostHog is a technology company founded in 2020 that offers an all-in-one platform for product analytics, feature flags, session replays, experiments, and surveys, primarily targeting developers. The company positions itself uniquely in the market by providing a comprehensive developer-focused analytics solution. The website is professionally designed using modern technologies such as Gatsby and React, hosted with Amazon Registrar and Cloudflare DNS, and employs PostHog's own analytics for user tracking and session recording. The site demonstrates good technical maturity with fast performance, mobile optimization, and SEO best practices. Security posture is solid with HTTPS enabled and domain status protections, though DNSSEC is not enabled and some security headers are missing. Privacy compliance is limited as no explicit privacy or cookie policies were found in the provided content. Overall, the website is trustworthy and professional, with room for improvement in privacy disclosures and security transparency.

Scanned

This is an earlier scan of posthog.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
70/ 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 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 posthog.com

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
62
Security headers
30
Email security
80
DNS health
85
Network security
100
GDPR outside view
70
Average
71

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

PostHog operates in the technology sector, offering SaaS solutions for product analytics and feature management. Its business model revolves around providing developers with tools to build successful products through data-driven insights. The company targets developer audiences and product teams, leveraging a unique all-in-one platform approach to differentiate itself from competitors. The domain registration and hosting infrastructure reflect a medium-sized enterprise with professional standards. The absence of detailed contact information and privacy policies suggests potential areas for growth in customer engagement and compliance. The company maintains a consistent brand presence and uses social media channels like Twitter to engage with its audience.

Security posture

The website employs HTTPS with a good SSL configuration and domain registration protections such as clientDeleteProhibited and clientTransferProhibited statuses. However, DNSSEC is not enabled, which could be a security enhancement. The site uses PostHog analytics with session recording capabilities that mask password inputs, indicating attention to user data privacy during tracking. No explicit security policies, incident response contacts, or vulnerability disclosure mechanisms were found, which limits transparency and readiness perception. Security headers are not explicitly detected in the provided content, suggesting room for improvement. Overall, the security posture is good but could be strengthened by publishing security policies, enabling DNSSEC, and adding security headers.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish comprehensive privacy and cookie policies with clear GDPR compliance and consent mechanisms.
  3. Add a security.txt file and vulnerability disclosure policy to improve transparency and incident response readiness.
  4. Implement and document security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options.
  5. Provide clear contact information including security and data protection officer contacts to build trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
PostHog
Description
PostHog is the only all-in-one platform for product analytics, feature flags, session replays, experiments, and surveys that's built for developers.
Key services
product analytics, feature flags, session replays, experiments, surveys
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React, Gatsby, PostHog analytics
Frameworks
Gatsby
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enabled
  • Domain status includes clientDeleteProhibited, clientTransferProhibited, clientUpdateProhibited
  • Session recording with input masking for passwords
  • Use of localStorage+cookie persistence for analytics

Analytics and tracking

Services
PostHog
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
PostHog analytics
Marketing tools
PostHog analytics
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is developer-focused and technology-oriented.
  3. No explicit privacy, cookie, or terms of service policies found in the provided HTML content.
  4. Use of PostHog analytics platform for tracking and session recording.
  5. Professional design and SEO metadata present.
  6. No contact emails or phone numbers explicitly found in the HTML content.
  7. No security.txt or vulnerability disclosure policy detected.
  8. Domain is registered with Amazon Registrar and uses Cloudflare DNS.
  9. SSL is enabled and configured properly.
  10. No suspicious or malicious content detected.
Technical notes

Notes

The website is built using modern web technologies including React and Gatsby, indicating a static site generation approach for performance and SEO benefits. Hosting is managed via Amazon Registrar and Cloudflare DNS, ensuring reliable infrastructure. The site uses PostHog's own analytics platform for user behavior tracking and session recording, with privacy-conscious features like input masking. Performance is fast with good mobile optimization and accessibility features. However, some technical improvements could include adding missing security headers and enabling DNSSEC. The site lacks visible forms or data collection fields in the provided content, suggesting minimal direct user data capture on the landing pages.
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

Earlier scans of this domain

  1. 68/100 −5Medium29 findingsView report
  2. 73/100Medium28 findingsView report
  3. 73/100Medium26 findingsView report
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