Skip to main content

Security report for sui.io

Mysten Labs, Inc · Technology · United States

Low risk. 4 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

76/100

Risk levelLow

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

Sui.io represents the online presence of Mysten Labs, Inc, a US-based technology company founded in 2020 specializing in a Layer 1 blockchain and smart contract platform. The platform aims to deliver the benefits of Web3 with the ease of Web2, targeting developers and enterprises interested in scalable, secure, and affordable blockchain infrastructure. The website is professionally designed, featuring extensive developer resources, community engagement initiatives, and ecosystem funding opportunities. The company positions itself as an innovative leader in blockchain technology with a focus on speed, security, and user experience. Technically, the website leverages modern web technologies including Webflow CMS, Google Tag Manager, Swiper.js, and Cloudflare hosting. It is optimized for performance, mobile responsiveness, and accessibility. The site uses multiple tracking and marketing tools such as LinkedIn Insight, Twitter UWT, and HubSpot forms for analytics and user engagement. However, explicit privacy and cookie policies are not found, though a cookie consent mechanism is implemented. From a security perspective, the site enforces HTTPS and uses domain transfer protection. No critical vulnerabilities or exposed sensitive data were detected. Recommendations include enabling DNSSEC, publishing formal privacy and security policies, and adding a vulnerability disclosure mechanism to enhance trust and compliance. Overall, Sui.io demonstrates a mature digital presence with strong business credibility and technical infrastructure. The security posture is solid but could be improved with better transparency on privacy and incident response. The risk level is low, making it a trustworthy platform for its target audience.

Scanned

This is an earlier scan of sui.io. View the latest report

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

4 findings rated critical or high. Fix these first.

  1. 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

  2. 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 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';…

  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 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 sui.io

This scan found 18 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.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
75
Security headers
50
Email security
85
DNS health
80
Network security
100
GDPR outside view
68
Average
76

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

Mysten Labs, Inc operates in the blockchain technology sector, offering a Layer 1 blockchain platform that emphasizes scalability, security, and ease of use. The company targets developers and enterprises building Web3 applications, providing developer portals, documentation, tutorials, and funding programs. Its market positioning is that of an innovative and fast blockchain platform with unique features such as the Move programming language and zkLogin authentication. The company maintains active community engagement through events, hackathons, and partnerships with academic institutions. Revenue streams likely include ecosystem grants, developer tools, and enterprise blockchain solutions. The partnership ecosystem includes various blockchain projects and technology providers, enhancing its competitive advantage.

Security posture

The website exhibits a good security maturity level with HTTPS enforced and domain transfer protection enabled. No security headers were explicitly detected in the provided data, suggesting room for improvement. There is no public security policy or incident response contact information, which limits transparency. No vulnerabilities or exposed sensitive data were found in the HTML content. The use of reputable hosting and registrar services like Cloudflare adds to the security posture. Compliance with GDPR and other privacy regulations is unclear due to missing explicit privacy policies. Incident response readiness and security culture indicators are not publicly visible, indicating potential gaps in communication. Overall, the security posture is solid but could benefit from enhanced policy disclosures and technical header implementations.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy page to improve privacy compliance and user trust.
  2. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  3. Implement and publish a security policy and incident response plan, including contact channels for security issues.
  4. Add security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to improve web security.
  5. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mysten Labs, Inc
Description
Sui is a first-of-its-kind Layer 1 blockchain and smart contract platform designed to make digital asset ownership fast, private, secure, and accessible.
Key services
Layer 1 blockchain platform, Smart contract platform, Developer portal and resources, Ecosystem funding and grants, Community events and programs
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Google Tag Manager, Google Fonts (Inter), Swiper.js for sliders, Lottie animations, Cloudflare DNS and registrar
Frameworks
Webflow
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager for controlled script loading

Analytics and tracking

Services
Google Analytics (via GTM), LinkedIn Insight, Twitter UWT
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
LinkedIn Insight, Twitter UWT
Marketing tools
HubSpot forms, Enzuzo cookie bar
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed with clear navigation and rich content.
  2. Strong focus on developer resources and community engagement.
  3. No explicit privacy or cookie policy pages found, but cookie consent mechanism present.
  4. No direct contact emails or phone numbers publicly listed; contact via forms and social media.
  5. Use of modern web technologies and hosting via Cloudflare.
  6. No security.txt or vulnerability disclosure found.
  7. WHOIS data supports legitimacy and consistent business identity.
Technical notes

Notes

The website is built using Webflow CMS, leveraging modern front-end technologies such as Swiper.js for interactive sliders and Lottie for animations. It uses Google Fonts for typography and integrates Google Tag Manager for analytics and marketing scripts. Hosting and DNS services are provided by Cloudflare, ensuring fast content delivery and DDoS protection. The site is well optimized for mobile devices and accessibility, with good SEO practices evident from meta tags and structured navigation. Performance is fast with asynchronous loading of scripts and optimized images. Technical risks are minimal, but the absence of DNSSEC and security headers represents an opportunity for modernization and improved security posture.
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. 75/100Medium20 findings · partial scanView report
Reviews of this site

Share your experience with sui.io. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review sui.io.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.