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Security report for bookla.com

Bookla · Technology · N/a

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

57/100

Risk levelMedium

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

Bookla is a technology company specializing in providing advanced booking and scheduling APIs and SDKs for web, mobile, and IoT platforms. Their solution targets developers and businesses seeking to integrate comprehensive appointment management features into their products. The platform supports multiple SDKs including iOS, Android, Flutter, and TypeScript, and offers no-code components for easier integration. With over 200,000 app downloads and more than 100 companies using their services, Bookla holds a solid position in the scheduling technology market. Technically, the website is built using modern frameworks such as Next.js and React, with a strong emphasis on performance, mobile optimization, and accessibility. The platform integrates with popular third-party services like Stripe, PayPal, Mailchimp, Slack, Google Sheets, and Google Calendar, enhancing its ecosystem and usability. Analytics and tracking are implemented via Google Analytics, Google Tag Manager, and Inspectlet, with a cookie consent mechanism in place. From a security perspective, the site enforces HTTPS and uses domain status locks to protect domain integrity. However, DNSSEC is not enabled, and explicit security headers are not clearly detected in the HTML. There is no publicly available security policy or incident response contact information, nor a vulnerability disclosure program. The domain registration data is consistent and legitimate, with no privacy protection masking registrant details. Overall, Bookla presents a professional, secure, and well-maintained platform with a strong business model and technical foundation. To further enhance trust and security posture, it is recommended to enable DNSSEC, implement comprehensive security headers, and publish security policies and vulnerability disclosure information.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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

5 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"

    • 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 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

  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 bookla.com

This scan found 26 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

€39.90one-time

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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
72
Security headers
25
Email security
70
DNS health
80
Network security
40
GDPR outside view
53
Average
57

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

Bookla operates in the technology sector, focusing on SaaS-based booking and scheduling solutions. Their competitive advantage lies in offering a comprehensive API and SDK suite that supports multiple platforms and no-code integrations, appealing to both developers and non-technical users. Revenue is generated primarily through subscription pricing with a free trial option. The company targets businesses requiring scalable and customizable appointment management, including integration with hardware and third-party services. Growth indicators include a substantial user base and multiple integrations. The partnership ecosystem includes payment processors (Stripe, PayPal) and marketing/communication tools (Mailchimp, Slack). Strategic observations highlight a focus on developer experience, ease of integration, and expanding no-code capabilities.

Security posture

Bookla demonstrates a mature security posture with enforced HTTPS, domain status protections, and secure payment processing via Stripe. The absence of DNSSEC and explicit security headers represents areas for improvement. No sensitive data exposure or vulnerable libraries were detected in the HTML content. The lack of a published security policy, incident response contacts, or vulnerability disclosure program suggests limited transparency in security governance. Compliance with GDPR is implied by the presence of privacy and cookie policies linked to the EU platform subdomain. Overall, the security maturity is good but could benefit from enhanced transparency and technical controls.

Recommendations

  1. Enable DNSSEC to protect against DNS spoofing and improve domain security.
  2. Implement and verify security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Publish a clear security policy and incident response contact information on the website.
  4. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  5. Regularly audit third-party scripts and tracking tools to minimize privacy risks and improve compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Bookla
Description
Bookla provides an advanced API and SDKs for appointment scheduling, offering a complete booking and scheduling solution including REST API, Mobile SDKs (iOS, Android, Flutter), Web SDK, and hardware integration.
Key services
Booking and scheduling API, Mobile SDKs, Web SDK, Hardware integration, No-code components, Third-party integrations
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, TypeScript, Google Analytics, Google Tag Manager, Inspectlet, Cookie Script
Frameworks
Next.js, React
Platforms
Web, iOS, Android, Flutter
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of clientDeleteProhibited and other domain status flags
  • No exposed sensitive data in HTML
  • Use of secure payment processor (Stripe)

Analytics and tracking

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

Advertising

Tracking pixels
Inspectlet
Marketing tools
Mailchimp, Slack
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, well-structured, and professionally presented.
  3. Strong focus on developer and business users for booking and scheduling solutions.
  4. Multiple SDKs and API offerings with no-code integration options.
  5. Good use of modern web technologies and analytics tools.
  6. Privacy and terms policies are present and linked to EU platform subdomain.
  7. No direct contact emails or phone numbers found on the platform page.
  8. No explicit security policy or incident response contact information found.
  9. No vulnerability disclosure or security.txt detected.
  10. No suspicious or malicious domains linked.
Technical notes

Notes

The website uses a modern technology stack centered on React and Next.js, ensuring server-side rendering and good SEO performance. The inclusion of TypeScript indicates a focus on code quality and maintainability. Performance is optimized with preloading of fonts and scripts, and the site is fully responsive with excellent mobile optimization. Analytics and marketing tools are integrated thoughtfully, though care should be taken to balance tracking with privacy compliance. Hosting details are not explicit but domain registration suggests GoDaddy involvement. No CMS is detected, indicating a custom or framework-based build. Overall, the technical infrastructure is robust, scalable, and aligned with current best practices.
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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