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Security report for simplybook.it

SimplyBook.me · Technology · United States

Low risk. 3 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

77/100

Risk levelLow

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

SimplyBook.me is a well-established SaaS provider specializing in online appointment booking and scheduling solutions for service-based industries worldwide. Founded in 2011, the company offers a comprehensive platform including booking websites, widgets, client and admin mobile apps, payment processing, and multi-channel integrations. The business targets a broad audience of small to medium enterprises seeking efficient scheduling and client management tools. Their market position is strong, supported by thousands of customers and positive testimonials. Technically, SimplyBook.me employs modern web technologies with a focus on performance, mobile optimization, and accessibility. Hosting is provided by Linode with DNS managed accordingly. The website integrates multiple analytics and marketing tools such as Google Tag Manager, LinkedIn Insight, and Reditus affiliate tracking, demonstrating digital maturity and marketing sophistication. From a security perspective, the company maintains a robust posture with ISO 27001 certification and GDPR compliance. HTTPS is enforced, and no critical vulnerabilities or exposed sensitive data were detected. However, some security headers could be improved, and a formal vulnerability disclosure policy is absent. Privacy policies and cookie consent mechanisms are comprehensive and transparent. Overall, SimplyBook.me presents a low-risk profile with strong business credibility, technical soundness, and good privacy and security practices. Strategic recommendations include enhancing security headers, publishing a security.txt file, and providing explicit incident response contacts to further strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
80/ 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

3 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 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 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 simplybook.it

This scan found 19 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

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

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Full report

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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
82
Security headers
45
Email security
75
DNS health
80
Network security
100
GDPR outside view
80
Average
77

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

SimplyBook.me operates in the technology sector, providing appointment scheduling SaaS solutions that cater to diverse industries including healthcare, education, fitness, and professional services. Their business model is subscription-based with tiered pricing aligned to booking volume and feature usage. Revenue streams include online bookings, payment processing fees, and premium features such as social media management and marketing tools. The company leverages partnerships with payment processors and social platforms to enhance service offerings. Growth indicators include a decade-long domain presence, ISO certification, and active customer engagement through blogs, case studies, and video tutorials. The platform's flexibility and customization options provide competitive advantages in a crowded market.

Security posture

SimplyBook.me demonstrates a mature security posture with ISO 27001 certification and GDPR compliance, indicating adherence to international standards and data protection regulations. The website enforces HTTPS and integrates secure client and admin applications with push notifications. No exposed credentials or vulnerable libraries were identified in the analyzed content. However, the absence of certain security headers like Content-Security-Policy and a published security.txt file suggests room for improvement. Incident response mechanisms and dedicated security contact channels are not explicitly disclosed, which could impact rapid vulnerability handling. Overall, the security culture appears proactive but could benefit from enhanced transparency and formalized vulnerability disclosure processes.

Recommendations

  1. Implement and enforce Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options HTTP headers to strengthen browser security.
  2. Publish a security.txt file at the root domain to facilitate responsible vulnerability disclosure and improve incident response readiness.
  3. Provide explicit incident response contact information (e.g., security@ or abuse@ email addresses) on the website or legal pages.
  4. Regularly audit third-party scripts and libraries to ensure no vulnerable components are included.
  5. Enhance transparency around data retention policies and user privacy to reinforce GDPR compliance and user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SimplyBook.me
Description
Online booking system. Booking website or widget for your own website. Let clients schedule appointments, get reminders and pay online 24/7. Free version!
Key services
Online appointment booking, Booking website and widgets, Client and admin mobile apps, Payment processing, Notifications via WhatsApp, SMS, Email, Integrations with social media and payment providers
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, YouTube embeds, SVG graphics, CSS3, HTML5
Frameworks
Bootstrap (implied by dropdown and modal classes), Google Tag Manager
Platforms
Web, iOS app, Android app
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • ISO 27001 certified
  • GDPR compliant
  • Client and admin apps with push notifications
  • No exposed sensitive data detected in HTML

Analytics and tracking

Services
Google Analytics, Piwik (Matomo), LinkedIn Insight
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads, LinkedIn Ads
Tracking pixels
LinkedIn Insight Tag, Reditus
Marketing tools
YouTube
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 rich content and multimedia.
  2. Strong focus on appointment booking SaaS for multiple industries.
  3. Good use of modern web technologies and mobile optimization.
  4. Strong privacy and security posture with ISO 27001 certification and GDPR compliance.
  5. Active marketing and analytics integration with transparent policies.
  6. No suspicious or malicious indicators found.
Technical notes

Notes

The website is built with modern HTML5 and CSS3 standards, utilizing SVG graphics for crisp visuals and responsive design techniques for excellent mobile optimization. Google Tag Manager is used for managing analytics and marketing tags, alongside integrations with YouTube, LinkedIn, and Reditus affiliate tracking. Hosting is managed via Linode, a reputable cloud provider. Performance appears fast with preloading of critical assets and lazy loading of images. Accessibility features such as ARIA labels and semantic HTML are present, contributing to good usability. The technical stack is robust with minimal technical debt visible, though explicit CMS usage is not detected, suggesting a custom or proprietary 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

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