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Security report for guidebook.com

Guidebook Inc. · Technology · United States

Medium risk. 2 critical or high findings in SSL/TLS and GDPR outside view.

Security score

67/100

Risk levelMedium

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

Guidebook Inc. operates a sophisticated SaaS platform that enables event organizers, educational institutions, and enterprises to build customized mobile and web apps for events. The company positions itself as a leader in the event app market with over 100,000 events supported and 25+ million app downloads globally. Their platform offers a no-code drag-and-drop builder, branded apps, event registration, and integrations with popular CRM and marketing tools, targeting a broad audience from small events to large enterprises. Technically, the website is built on modern web technologies including Webflow CMS, Google Fonts, Google Tag Manager, and various analytics and marketing tools such as Bing Ads, LinkedIn Insight, and VWO. The site is well-optimized for mobile, fast loading, and accessible, reflecting a mature digital infrastructure. Security is robust with HTTPS enforced and use of reCAPTCHA, though explicit security headers and vulnerability disclosure policies could be improved. The security posture is strong with no visible vulnerabilities or exposed sensitive data. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Business credibility is supported by professional content, customer testimonials, and strong trust signals from third-party review platforms. However, the WHOIS data is missing or unavailable, which slightly reduces transparency and trust. Overall, Guidebook presents a low-risk profile with a professional and secure online presence. Strategic recommendations include enhancing WHOIS transparency, publishing a vulnerability disclosure policy, and explicitly implementing security headers to further strengthen security and trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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

2 findings 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  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

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

Keep watching guidebook.com

This scan found 13 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

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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
0
Security headers
60
Email security
83
DNS health
90
Network security
100
GDPR outside view
68
Average
67

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

Guidebook holds a competitive position in the event management technology sector, leveraging a SaaS business model focused on app creation and event engagement. Their revenue streams likely include subscription fees for app building, branded app services, event registration, and integrations. The company targets event organizers, educational institutions, and enterprises seeking scalable and customizable event apps. Growth indicators include extensive app downloads, global reach across 75+ countries, and a large customer base. Partnerships with platforms like Eventbrite, Cvent, and Zapier enhance their ecosystem. The company emphasizes customer support excellence and continuous feature innovation to maintain market leadership.

Security posture

Guidebook demonstrates a mature security posture with enforced HTTPS, use of reCAPTCHA on forms, and no exposed sensitive information. The presence of security-related content and a dedicated security page indicates awareness and commitment to security best practices. However, the absence of explicit security headers such as Content-Security-Policy and lack of a public vulnerability disclosure or incident response contact reduces transparency. GDPR compliance is indicated by privacy and cookie policies with consent mechanisms. Incident response readiness and data protection officer contact details are not publicly disclosed, representing potential compliance gaps.

Recommendations

  1. Publish explicit security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance browser security.
  2. Create and publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  3. Provide clear incident response contact information, including security or abuse email addresses, to improve transparency and trust.
  4. Enhance WHOIS data transparency if possible, or provide clear justification for privacy protection to reduce suspicion.
  5. Continue to monitor and update privacy and cookie policies to maintain GDPR and other regulatory compliance.

Contact details published on the site

Registration number
Registration Now
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Guidebook Inc.
Description
Guidebook empowers organizers around the world with the best-in-class app building platform. Fast, secure, scalable. From small events to enterprise solutions.
Key services
Event app builder, Mobile event apps, Branded apps and spaces, Event marketing websites, Event registration and badges, Integrations with CRM and marketing tools
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Google Fonts, Google Tag Manager, Bing Ads, LinkedIn Insight Tag, VWO (Visual Website Optimizer), reCAPTCHA, Zapier integration
Frameworks
Webflow
Platforms
Web, iOS, Android
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of reCAPTCHA for forms
  • No exposed sensitive data in HTML
  • Use of security-focused cookies and scripts

Analytics and tracking

Services
Google Analytics, LinkedIn Insight, Bing Ads, VWO
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Bing Ads
Tracking pixels
Google Analytics (via GTM), LinkedIn Insight Tag, Visual Website Optimizer (VWO), Bing Ads
Marketing tools
Zapier
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 interactive features
  2. Strong focus on event app building with multiple use cases and integrations
  3. Multiple calls to action for demos and product tours
  4. Use of modern web technologies and analytics tools
  5. Good privacy and cookie policy presence with consent mechanisms
  6. No exposed sensitive data or security misconfigurations detected
  7. WHOIS data missing or unavailable, reducing transparency
Technical notes

Notes

The website is built using Webflow CMS, leveraging modern front-end technologies and integrating multiple third-party analytics and marketing tools such as Google Tag Manager, Bing Ads, LinkedIn Insight, and VWO. The site is optimized for performance and mobile responsiveness, with fast loading times and good accessibility features. Hosting appears to be managed via Webflow's infrastructure. The use of reCAPTCHA enhances form security. There is no evidence of outdated or vulnerable libraries. Opportunities exist to improve security headers and formalize vulnerability disclosure processes to reduce technical 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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