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Security report for diabrowser.com

The Browser Company · Technology · N/a

Partial score · DNS & email only

75/100

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

Dia Browser is an AI-powered web browser developed by The Browser Company, designed to enhance productivity by enabling users to chat with their tabs, write in their own voice, and manage tasks with privacy controls. The website presents a modern, well-branded interface emphasizing privacy and AI integration, targeting general users interested in innovative browsing experiences. The product is positioned as a Chrome alternative with contextual AI features, aiming to capture a niche in the technology sector focused on privacy and productivity. Technically, the website is built using modern web technologies including React and Next.js, with responsive design and SVG graphics for visual appeal. The site loads moderately fast and is optimized for mobile devices, though accessibility features appear basic. The presence of a custom analytics script indicates some level of user tracking, but no major third-party analytics or advertising networks were detected. From a security perspective, the site enforces HTTPS and emphasizes privacy in its messaging, but lacks explicit security headers and visible privacy or cookie policies. No contact information or incident response channels are provided, and no vulnerability disclosure or security.txt files were found. The WHOIS data for the domain is unavailable, raising concerns about domain registration legitimacy, though the website content and branding suggest a legitimate business presence. Overall, the website is professional and functional but would benefit from enhanced transparency in privacy and security policies, improved contact information, and verification of domain registration to strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

Checks completed
5of 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

1 finding rated critical or high. Fix these first.

  1. 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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Keep watching diabrowser.com

This scan found 10 issues across 4 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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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
Email security
80
DNS health
85
Network security
100
Average
85
After the cap
75

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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

The Browser Company operates in the technology sector, focusing on developing an AI-enhanced web browser named Dia. Their business model revolves around delivering a privacy-focused, productivity-enhancing browser alternative to mainstream options like Chrome. The target audience includes tech-savvy users and professionals seeking AI integration and privacy control in their browsing experience. Market positioning is innovative, leveraging AI chat capabilities with open tabs to differentiate from competitors. The company appears small in size with no subsidiaries or parent companies indicated. The website content and branding are consistent, supporting a credible market presence. However, the lack of public WHOIS data and contact details limits full business transparency. No partnerships or payment processors were identified from the website data.

Security posture

The website demonstrates a baseline security posture with HTTPS enabled, ensuring encrypted communications. However, the absence of key security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces protection against common web attacks. No exposed sensitive data or vulnerable libraries were detected in the provided content. The lack of privacy and cookie policies, incident response contacts, and vulnerability disclosure mechanisms indicates gaps in compliance and security readiness. The site does not provide clear channels for reporting security incidents, which could hinder timely response. Overall, the security maturity is moderate but requires improvements in policy transparency, header implementation, and incident management to align with best practices and regulatory requirements.

Recommendations

  1. Implement and prominently display comprehensive privacy and cookie policies to enhance transparency and GDPR compliance.
  2. Add standard security headers including CSP, HSTS, and X-Frame-Options to strengthen web security posture.
  3. Provide clear contact information including security incident response and abuse reporting channels.
  4. Establish a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  5. Enhance accessibility features and conduct audits to improve inclusivity and user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
The Browser Company
Description
Dia is the AI browser from The Browser Company. Chat with your tabs, write in your own voice, learn and plan faster, shop, and more — all with privacy that you control.
Key services
AI browser, Chat with tabs, Privacy-focused browsing, Productivity tools
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, CSS, SVG
Frameworks
Next.js
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Privacy emphasis

Analytics and tracking

Services
arcnet-script.js (likely custom or proprietary)
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
arcnet-script.js
Transparency
poor

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
moderate

Key observations

  1. Website is accessible and not blocked by WAF
  2. No WHOIS registration data available, domain may be unregistered or WHOIS server returned no data
  3. No privacy, cookie, or terms of service policies found on main page
  4. No contact emails or phone numbers found
  5. Website uses modern web technologies and frameworks
  6. Focus on AI browser product with privacy emphasis
  7. No explicit security headers detected in provided data
  8. Minimal external links, mostly to own domain and CDN
  9. Tracking script 'arcnet-script.js' present, likely for analytics
  10. No social media links or business contact info found in HTML
Technical notes

Notes

The website is built on a modern technology stack featuring React and Next.js frameworks, enabling server-side rendering and improved SEO. The use of SVG graphics and responsive CSS ensures a visually appealing and mobile-optimized experience. Performance is moderate with deferred loading of scripts and preloading of critical CSS. No CMS or hosting provider information was identified. The site lacks advanced accessibility features and some SEO optimizations could be enhanced. The presence of a custom analytics script suggests proprietary tracking, but no major third-party analytics or advertising tools were detected. Technical debt appears low, but improvements in security headers and policy pages are recommended to reduce risks.
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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