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Security report for idealo.de

idealo internet GmbH · E-commerce · Germany

Low risk. 4 critical or high findings in GDPR outside view and Security headers.

Security score

80/100

Risk levelLow

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

idealo.de is Germany's leading price comparison website, offering consumers access to over 350 million offers from more than 50,000 shops. Owned by Axel Springer SE, idealo has established itself as a market leader in the e-commerce price comparison sector since its founding in 2000. The platform provides expert product advice and comprehensive price comparisons, targeting general consumers primarily in Germany and other European countries. The website is professionally designed with excellent user experience, mobile optimization, and clear navigation, supporting its strong market position. Technically, idealo.de leverages modern web technologies including React and Next.js frameworks, hosted on Amazon AWS infrastructure. The site integrates Usercentrics for GDPR-compliant cookie consent management and uses Google Tag Manager for analytics. Performance is fast, and accessibility features are well implemented. The use of SVG logos and fonts enhances branding consistency and load efficiency. From a security perspective, idealo.de enforces HTTPS with strong SSL configuration and implements key security headers such as Content Security Policy and Strict-Transport-Security. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the site lacks a dedicated security policy or incident response page, which could enhance transparency and preparedness. The WHOIS data is consistent with the business claims, showing a domain age appropriate for the company's history and no suspicious registration patterns. Overall, idealo.de presents a low-risk profile with strong business credibility, technical maturity, and privacy compliance. Strategic recommendations include publishing a formal security policy, providing incident response contact details, and considering a security.txt file to further improve security posture and trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
45/ 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

4 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.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • 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

  2. 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 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';…

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Keep watching idealo.de

This scan found 14 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.

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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
95
Security headers
65
Email security
98
DNS health
75
Network security
100
GDPR outside view
45
Average
80

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention idealo.de, from OffSeq Breach.

Total records
31,184
Employees
3
Customers
31,059
Third parties
122
Weak passwords
14%

Latest record dated 2026-06-14 · 30 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for idealo.de.

Select it in the checkout above.

Masked preview

  • –account.idealo.de2026-06-14
  • –account.idealo.de2026-06-13
  • –idealo.de2026-05-28

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

idealo.de operates as a price comparison platform within the e-commerce sector, generating revenue primarily through affiliate marketing and partnerships with online retailers. Its market leadership in Germany is supported by a large catalog of offers and a user-friendly interface. The company targets a broad consumer base seeking to optimize purchasing decisions. The parent company Axel Springer SE provides strong corporate backing. idealo's ecosystem includes related services such as flight price comparison (flug.idealo.de), indicating diversification within the price comparison niche. The platform's growth is driven by extensive product data, expert content, and compliance with European data protection regulations, positioning it well against competitors.

Security posture

idealo.de demonstrates a mature security posture with enforced HTTPS, robust SSL configuration, and implementation of essential security headers. The integration of Usercentrics CMP ensures GDPR-compliant cookie consent management. No immediate vulnerabilities or exposed sensitive data were identified in the analyzed HTML content. However, the absence of a dedicated security policy and incident response contact information represents a gap in transparency and readiness. The WHOIS data supports legitimacy and reduces risk of domain-related fraud. Overall, the security maturity is high but could benefit from enhanced documentation and public disclosure of security practices.

Recommendations

  1. Publish a dedicated security policy page outlining security controls and practices.
  2. Provide explicit incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  4. Regularly audit and update third-party scripts and libraries to mitigate vulnerabilities.
  5. Enhance transparency on data retention and processing policies to strengthen privacy compliance.

Contact details published on the site

Addresses
Legal name
idealo internet GmbH
VAT number
DE 811 273 930
Registration number
HRB 100 229 B
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
idealo internet GmbH
Description
idealo is Germany's leading price comparison platform offering over 350 million offers from more than 50,000 shops, providing expert advice and product comparisons to help consumers save money.
Key services
Price comparison, Product search, Expert reviews, Shopping advice
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Usercentrics CMP, AWS DNS, SVG graphics, Google Fonts, JavaScript ES Modules
Frameworks
Next.js
Platforms
AWS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Content Security Policy
  • Cookie consent management
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Usercentrics CMP
Marketing tools
Usercentrics Consent Management
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 no blocking or WAF challenges.
  2. Strong GDPR and cookie consent compliance with Usercentrics CMP integration.
  3. High-quality, professional design and user experience.
  4. Robust technical stack using modern frameworks and AWS hosting.
  5. No exposed sensitive data or visible vulnerabilities in HTML content.
  6. No explicit security policy or incident response page found.
  7. WHOIS data consistent and domain age appropriate.
  8. Multiple localized versions of the site for European markets.
  9. Use of SVG logos and fonts for optimized performance and branding.
Technical notes

Notes

The website is built on a modern technology stack featuring React and Next.js frameworks, enabling server-side rendering and fast performance. Hosting on Amazon AWS provides scalability and reliability. The site uses Usercentrics for consent management and Google Tag Manager for analytics, reflecting a mature approach to privacy and data collection. The use of SVG assets and Google Fonts optimizes load times and branding consistency. Accessibility and SEO optimizations are well implemented, supporting broad user reach and compliance. Technical risks are minimal, with no visible outdated or vulnerable components. Opportunities exist to further modernize by documenting security policies and incident response procedures.
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. 79/100Low23 findingsView report
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