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Security report for sentry.io

Functional Software, Inc dba Sentry · Technology · United States

Low risk. 4 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

78/100

Risk levelLow

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

Sentry, operated by Functional Software, Inc, is a well-established enterprise software company founded in 2012, specializing in application performance monitoring and error tracking solutions for developers and software teams. The company positions itself as a leader in the technology sector, offering SaaS-based services that enable clients to detect, diagnose, and resolve software errors efficiently, thereby improving application reliability and user experience. The website content is professionally designed, highly relevant, and targets a developer audience with clear messaging and modern UI/UX standards. Technically, the website leverages modern frameworks such as Gatsby and React, hosted likely on Google Cloud infrastructure, with integrations for Google Tag Manager and Plausible Analytics for tracking and marketing insights. The site demonstrates fast performance, excellent mobile optimization, and good accessibility features, reflecting a mature digital infrastructure. However, explicit privacy and cookie policies are not detected on the analyzed page, indicating an area for compliance improvement. From a security perspective, the site enforces HTTPS, uses clientTransferProhibited domain status, and employs reputable DNS and hosting providers. While no critical vulnerabilities or exposed sensitive data are found, the absence of DNSSEC and explicit security headers suggests room for enhancement. Incident response and vulnerability disclosure mechanisms are not visible, which could be improved to strengthen trust and transparency. Overall, Sentry's website reflects a high level of professionalism, technical maturity, and business credibility. The domain registration data aligns well with the company's identity and history, supporting legitimacy. Strategic recommendations include publishing comprehensive privacy and cookie policies with consent mechanisms, enabling DNSSEC, adding explicit security headers, and providing clear security and incident response information to enhance compliance and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 100 · Low
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

4 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"

  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

  3. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

  4. 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

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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
77
Security headers
45
Email security
75
DNS health
85
Network security
100
GDPR outside view
85
Average
78

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

Sentry operates in the technology sector, focusing on developer tools for application monitoring and error tracking. Its SaaS business model targets software development teams and enterprises seeking to improve software quality and operational efficiency. The company benefits from a strong market position as a recognized leader in its niche, supported by a mature digital presence and consistent branding. The absence of visible contact details on the welcome page suggests that contact channels may be centralized elsewhere or require user login. The company leverages partnerships with major cloud and analytics providers, enhancing its ecosystem. Growth indicators include a long domain history and professional web infrastructure. No subsidiaries or parent companies are identified from the data provided.

Security posture

Sentry's security posture is robust with HTTPS enforced and domain transfer protections in place. The use of Google-managed DNS and hosting infrastructure adds reliability and security. However, the lack of DNSSEC and explicit security headers such as Content-Security-Policy and X-Frame-Options could expose the site to certain risks. No security.txt or vulnerability disclosure pages are found, which limits transparency for security researchers. No incident response contacts are visible, which could hinder timely reporting of security issues. The site does not expose sensitive data or vulnerable libraries in the analyzed content. Overall, the security maturity is high but could be improved with additional security controls and transparency measures.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy with explicit user consent mechanisms to improve GDPR compliance.
  2. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  3. Implement and publish explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  4. Create and link to a security.txt file and vulnerability disclosure policy to facilitate responsible security reporting.
  5. Add visible incident response contact channels (e.g., security@ or abuse@ email addresses) on the website.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Functional Software, Inc dba Sentry
Description
Application performance monitoring for developers & software teams to see errors clearer, solve issues faster & continue learning continuously.
Key services
Application performance monitoring, Error tracking, Issue resolution, Continuous learning
Content quality
excellent
Branding
consistent

Technology

Stack
React, Gatsby, Google Tag Manager, Plausible Analytics
Frameworks
Gatsby
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Client transfer prohibited domain status
  • Use of Google Tag Manager with nonce
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager, Plausible Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Plausible Analytics
Marketing tools
Plausible 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 rich, professional, and targeted at software developers and teams.
  3. No explicit privacy or cookie policies found on the welcome page HTML content.
  4. Strong use of modern web technologies and analytics tools.
  5. WHOIS data confirms long-standing domain ownership by the company.
  6. No contact emails or phone numbers explicitly found in the provided HTML content.
  7. No security.txt or vulnerability disclosure information detected.
  8. No visible forms on the welcome page HTML content.
  9. Social media link to Mastodon (fosstodon.org/@getsentry) found.
Technical notes

Notes

The website is built using modern web technologies including React and Gatsby, ensuring fast loading times and excellent mobile responsiveness. Hosting and DNS are managed via Google Domains and likely Google Cloud, providing reliable infrastructure. Analytics are implemented using Google Tag Manager and Plausible Analytics, indicating a balanced approach to user tracking and privacy. The site uses optimized fonts and images, and the HTML structure is valid and well-organized. No CMS is detected, suggesting a custom or static site generation approach. Technical risks are minimal, but the absence of DNSSEC and some security headers represent potential areas for technical debt reduction and modernization.
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. 79/100 +4Low25 findingsView report
  2. 75/100 −3Medium28 findingsView report
  3. 78/100Low22 findingsView report
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