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Security report for spline.design

Spline, Inc. · Technology · Iceland

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

66/100

Risk levelMedium

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

Spline, Inc. is a technology company specializing in web-based 3D design software that enables real-time collaboration and interactive 3D experiences. Founded in 2019 and backed by Y Combinator, Spline offers a SaaS platform with free and paid tiers, targeting designers, developers, and creative teams seeking to create and embed 3D content seamlessly. The company maintains a strong market position as an innovative and accessible 3D design tool with a growing user base and enterprise offerings. Technically, Spline employs a modern technology stack including React and Next.js, hosted on Vercel, ensuring fast performance and mobile optimization. The website is well-structured with comprehensive SEO and accessibility features, supported by analytics and marketing tools such as Google Tag Manager, Metricool, and Apollo.io. The digital infrastructure reflects a mature and scalable platform. From a security perspective, the site enforces HTTPS, implements standard security headers, and provides clear privacy and cookie policies with consent mechanisms. While no critical vulnerabilities or exposed sensitive data were detected, the absence of a public vulnerability disclosure policy and incident response contacts suggests areas for improvement. The domain registration is privacy protected but consistent with the company's profile and age. Overall, Spline demonstrates a high level of professionalism, security awareness, and compliance, making it a trustworthy platform for its users. Strategic recommendations include enabling DNSSEC, publishing a vulnerability disclosure policy, and enhancing incident response transparency to further strengthen security posture and user trust.

Scanned

This is an earlier scan of spline.design. View the latest report

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

6 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 spline.design

This scan found 25 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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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
30
Email security
75
DNS health
65
Network security
100
GDPR outside view
53
Average
66

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

Spline operates in the competitive 3D design software market with a unique focus on web-based real-time collaboration and interactive experiences. Its SaaS business model includes free access to attract users and paid plans for advanced features and enterprise clients. The company leverages partnerships such as Y Combinator for growth and credibility. Its target customers include designers, developers, and creative teams who require flexible and accessible 3D tools. The presence of extensive tutorials, templates, and community engagement supports user acquisition and retention. Spline's continuous feature expansion and integration capabilities position it well for sustained growth and market differentiation.

Security posture

Spline exhibits a mature security posture with enforced HTTPS, comprehensive security headers, and cookie consent mechanisms aligned with GDPR requirements. The website does not expose sensitive information and uses privacy protection for domain registration appropriately. However, the lack of a public vulnerability disclosure policy and incident response contacts limits transparency and may delay vulnerability reporting and mitigation. The use of third-party trackers is moderate and balanced with privacy considerations. Overall, the security culture appears proactive but could benefit from formalized disclosure and response processes.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  3. Add explicit incident response contact emails such as security@ or abuse@ addresses.
  4. Regularly audit and update third-party scripts to mitigate supply chain risks.
  5. Consider obtaining and displaying security certifications or compliance attestations to boost user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Spline, Inc.
Description
Spline is a free 3D design software with real-time collaboration to create web interactive experiences in the browser. Easy 3d modeling, animation, textures, and more.
Key services
3D modeling, Animation, Real-time collaboration, Interactive 3D experiences, 3D exports and embedding
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Vercel hosting, Google Tag Manager, Apollo.io tracker, Metricool tracker
Frameworks
Next.js, React
Platforms
Web, macOS, Windows
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Client transfer prohibited domain status
  • Cookie consent banner implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via GTM), Metricool, Apollo.io
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Metricool, Apollo.io
Marketing tools
Metricool, Apollo.io
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 branding and consistent messaging throughout the site.
  3. Multiple social media channels actively linked and maintained.
  4. Use of modern web technologies and hosting on Vercel.
  5. Good privacy and cookie compliance with visible banners and policies.
  6. No phone numbers or physical addresses explicitly listed.
  7. Contact primarily via email with company domain addresses.
  8. No visible security.txt or vulnerability disclosure page.
  9. No explicit incident response or abuse contact emails found.
  10. Domain uses privacy protection service but is consistent with business profile.
Technical notes

Notes

The website is built on a modern React and Next.js framework, hosted on Vercel, ensuring fast load times and excellent mobile responsiveness. The use of preloading fonts and scripts optimizes performance. SEO is well addressed with meta tags and Open Graph data. Accessibility features are present but could be further enhanced with ARIA landmarks and keyboard navigation testing. The integration of analytics and marketing tools is balanced with privacy compliance. No CMS is detected, indicating a custom or headless architecture. Overall, the technical implementation supports scalability and a high-quality user experience.
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. 68/100Medium33 findingsView report
  2. 68/100Medium33 findingsView report
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