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Security report for trengo.eu

Trengo · Technology · Netherlands

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

73/100

Risk levelMedium

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

Trengo is a well-established technology company founded in 2005, specializing in AI-powered customer engagement platforms that centralize omnichannel communication. Their platform integrates AI agents, AI journeys, and WhatsApp Business API to automate and enhance customer support and engagement. The company targets customer service and sales teams aiming to improve efficiency and customer satisfaction. Technically, the website is built on Webflow with a modern tech stack including jQuery, GSAP, and multiple analytics and marketing tools. The site is fast, mobile-optimized, and SEO-friendly, reflecting a mature digital presence. Security-wise, the site enforces HTTPS, uses Cloudflare DNS, and implements a comprehensive cookie consent mechanism, though explicit security policies and incident response contacts are not published. Overall, the domain registration and website content are consistent and legitimate, with no critical vulnerabilities detected. Strategic recommendations include enabling DNSSEC, publishing security and incident response policies, and adding a vulnerability disclosure mechanism.

Scanned

This is an earlier scan of trengo.eu. View the latest report

NIS2 and GDPR posture

GDPR outside view
95/ 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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. 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

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

Keep watching trengo.eu

This scan found 20 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
65
Security headers
15
Email security
77
DNS health
85
Network security
100
GDPR outside view
95
Average
73

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

Trengo occupies a strong market position as a Meta Business Partner and official WhatsApp Business Partner, serving over 9,000 businesses worldwide. Their SaaS business model focuses on delivering AI-driven customer engagement solutions that automate repetitive tasks and improve customer interactions. The company targets sectors such as retail, e-commerce, travel, hospitality, automotive, energy, and financial services. Their partnership ecosystem includes major platforms like WhatsApp and Meta, enhancing credibility and reach. Growth indicators include active marketing, comprehensive analytics usage, and continuous product innovation with AI features. The company maintains a professional brand image with consistent messaging and strong trust signals such as G2 ratings and partner badges.

Security posture

Trengo demonstrates a solid security posture with HTTPS enforced and domain status set to clientTransferProhibited, reducing risk of unauthorized domain transfers. The use of Cloudflare DNS and bot management cookies adds protection against malicious traffic. The cookie consent banner complies with GDPR requirements, offering users control over cookie categories. However, the absence of a dedicated security policy page, incident response contact information, and vulnerability disclosure mechanisms represents gaps in transparency and readiness. No exposed sensitive data or vulnerable libraries were detected in the website content. Security headers are implied but not explicitly documented. Overall, the security maturity is good but could be improved by formalizing policies and communication channels.

Recommendations

  1. Enable DNSSEC to enhance DNS security and prevent spoofing.
  2. Publish a dedicated security policy page outlining security practices and controls.
  3. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  4. Implement and publish a vulnerability disclosure policy and security.txt file.
  5. Explicitly configure and document security headers like Content-Security-Policy and X-Content-Type-Options.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Trengo
Description
Trengo offers an AI-powered customer engagement platform that centralizes omnichannel communication and automates workflows to enhance customer interactions.
Key services
Omnichannel inbox, AI agents (AI HelpMate), AI Journeys, WhatsApp Business API integration, Reporting & analytics, Mobile apps
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow, jQuery, GSAP, Google Tag Manager, Google Analytics, Hotjar, Visual Website Optimizer (VWO), Dreamdata analytics, Cloudflare DNS
Frameworks
Webflow CMS
Platforms
Cloudflare
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Cloudflare Bot Management cookies
  • Cookie consent banner with customization and rejection options

Analytics and tracking

Services
Google Analytics, Hotjar, Segment, Dreamdata
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Ads, Facebook Ads, LinkedIn Ads, Bing Ads, DoubleClick
Tracking pixels
Facebook Pixel, LinkedIn Insight Tag, Hotjar, Segment
Marketing tools
Dreamdata, Hotjar, Visual Website Optimizer (VWO), CookieYes
Transparency
good

Site quality

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

Key observations

  1. Website uses modern web technologies and analytics tools.
  2. Strong focus on AI-powered customer engagement solutions.
  3. Comprehensive cookie consent mechanism with detailed cookie categorization.
  4. No exposed sensitive data or security misconfigurations detected.
  5. No direct contact emails or phone numbers found; contact via forms only.
  6. No explicit security policy or incident response information published.
  7. No vulnerability disclosure or security.txt found.
  8. Website is well-structured, mobile-optimized, and SEO-friendly.
Technical notes

Notes

The website is built on the Webflow CMS platform, leveraging modern JavaScript libraries such as jQuery and GSAP for animations and interactions. It integrates multiple analytics and marketing tools including Google Analytics, Hotjar, Segment, Dreamdata, and Visual Website Optimizer, indicating a mature data-driven approach. Hosting and DNS are managed via Cloudflare, providing performance and security benefits. The site is mobile-optimized with responsive design and accessibility considerations. Performance is fast with efficient asset loading and CDN usage. Technical debt appears minimal, though opportunities exist to enhance security header implementation and formalize security documentation. Overall, the technical infrastructure supports a robust and scalable customer engagement platform.
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. 73/100 +6Medium29 findingsView report
  2. 67/100Medium30 findingsView report
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