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Security report for tether.to

Tether Holdings Limited · Finance · British Virgin Islands

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

Security score

85/100

Risk levelLow

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

Tether.to is the official website for Tether, a leading issuer of USDT stablecoins widely used in the cryptocurrency and blockchain ecosystem. The company operates primarily in the finance and technology sectors, providing stablecoin issuance and related financial services. The website reflects a mature digital presence with a modern tech stack including React and Gatsby, ensuring fast performance and excellent mobile optimization. Security posture is strong with HTTPS, comprehensive security headers, and no visible vulnerabilities. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Business credibility is high, supported by transparent company information and trust indicators such as transparency reports and official social media channels.

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. 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

  2. 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 tether.to

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

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

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

Tether holds a significant market position as a stablecoin issuer, targeting cryptocurrency users, investors, and financial institutions. The business model revolves around stablecoin issuance backed by fiat reserves, with additional products like Tether Gold. The company is part of the iFinex group and operates subsidiaries such as Tether Operations Limited. The website content is professional and comprehensive, supporting user education and transparency. Partnerships and related domains indicate a well-established ecosystem. Growth indicators include active news updates and product expansions.

Security posture

The website demonstrates a high level of security maturity, employing HTTPS with excellent SSL configuration and multiple security headers. No exposed sensitive data or vulnerable libraries were detected. However, explicit security policies and incident response information are not publicly detailed, and no vulnerability disclosure program or security.txt file was found. These gaps suggest room for improvement in transparency and coordinated vulnerability management. Overall, the security posture is robust but could benefit from enhanced communication of security practices.

Recommendations

  1. Publish a dedicated security policy and incident response plan on the website.
  2. Implement and publicize a vulnerability disclosure program including a security.txt file.
  3. Enhance contact information with dedicated security and abuse email addresses.
  4. Regularly audit and update third-party libraries to avoid vulnerabilities.
  5. Increase transparency around data retention policies and privacy compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Tether Holdings Limited
Description
The official home of Tether and USDT stablecoins.
Key services
USDT stablecoin issuance, Tether Gold, Transparency reports
Content quality
excellent
Branding
consistent

Technology

Stack
React, Gatsby, Material-UI, Google Tag Manager, Google Analytics
Frameworks
Gatsby, React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Secure cookie consent mechanism

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

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 and well maintained
  2. Clear navigation and comprehensive content about Tether stablecoins
  3. Use of modern web technologies and analytics tools
  4. Strong security posture with HTTPS and security headers
  5. Transparency and regulatory compliance information available
  6. No signs of malicious or suspicious activity
Technical notes

Notes

The website is built on a modern React and Gatsby framework with Material-UI for styling, ensuring a responsive and performant user experience. Google Tag Manager and Google Analytics are used for analytics and marketing. The site uses well-structured metadata including JSON-LD for SEO and accessibility. Hosting provider details are not explicitly disclosed. The site shows no signs of technical debt or outdated technologies. Performance and SEO optimizations are well implemented, contributing to a fast and accessible website.
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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