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Security report for stacks.co

Stacks · Technology · N/a

Partial score · DNS & email only

75/100

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

Stacks is a technology platform focused on enabling smart contracts, decentralized applications, and DeFi on Bitcoin's Layer 2. It positions itself as the leading Bitcoin L2 solution, providing developers with tools, documentation, and an ecosystem to build on Bitcoin securely. The website reflects a mature digital presence with professional design, clear navigation, and active community engagement through multiple social channels. The platform offers key services such as sBTC, a Bitcoin-backed asset, and supports a vibrant ecosystem of apps and wallets. Technically, the site is built on Webflow with modern JavaScript libraries and uses Plausible for privacy-focused analytics. Security posture is good with HTTPS enforced and a bounty program in place, though some improvements like security headers and cookie consent mechanisms are recommended. WHOIS data is redacted, which is common in crypto domains, but the overall trustworthiness is high based on content quality and ecosystem links.

Scanned

5 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

1 finding rated critical or high in the checks that completed. 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.

    • 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 stacks.co

Only DNS and email could be checked this time. Monitoring re-checks every day and emails you when something material changes.

Daily monitoring

€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. See sample alerts.

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
72
Network security
100
Average
86
After the cap
75

Not counted

  • Security headers: did not complete in this scan.
  • Email security: did not complete in this scan.
  • DNS health: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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

Stacks operates in the blockchain technology and finance sectors, targeting developers and Bitcoin users interested in decentralized applications and DeFi. Its business model revolves around providing a Layer 2 platform on Bitcoin, enabling smart contracts and tokenized assets. The company leverages partnerships with open-source communities and security platforms like Immunefi. The ecosystem includes wallets, lending protocols, and synthetic assets, indicating a diversified service offering. Growth indicators include active GitHub repositories, community channels, and recent news updates. The lack of explicit contact information and WHOIS transparency is typical in this industry but suggests a need for enhanced trust signals. Overall, Stacks holds a strong market position as a pioneer in Bitcoin Layer 2 solutions.

Security posture

The website demonstrates a solid security foundation with HTTPS and a public bounty program for vulnerability disclosure. However, the absence of visible security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options indicates room for improvement. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The site lacks explicit incident response or security policy pages, which could enhance transparency and readiness. Privacy compliance is supported by a comprehensive privacy policy, but cookie consent mechanisms are missing. Overall, the security posture is good but could be strengthened by implementing recommended headers and publishing detailed security documentation.

Recommendations

  1. Implement and enforce security headers including CSP, HSTS, and X-Frame-Options to mitigate common web vulnerabilities.
  2. Add a visible cookie consent banner and detailed cookie policy to improve privacy compliance and user trust.
  3. Publish dedicated incident response and security policy pages to enhance transparency and preparedness.
  4. Provide clear and accessible contact information including company emails and phone numbers to improve business credibility.
  5. Add a terms of service page to clarify user rights and obligations, supporting legal compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Stacks
Description
Activate the Bitcoin economy with apps & smart contracts that use Bitcoin as a secure base layer.
Key services
Bitcoin Layer 2 smart contracts, Developer tools and documentation, Ecosystem apps and wallets, sBTC (Bitcoin-backed asset), Community and educational resources
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, jQuery 3.5.1, Google Fonts (Open Sans, Montserrat), Plausible Analytics
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of security-first programming language Clarity (mentioned)
  • Bounty program for vulnerability disclosure

Analytics and tracking

Services
plausible.io
Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
plausible.io
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 and professionally designed
  2. Strong focus on Bitcoin Layer 2 technology and developer ecosystem
  3. No direct contact emails or phone numbers found on main site
  4. Privacy policy is present and comprehensive
  5. No cookie consent banner or explicit cookie policy detected
  6. No terms of service page found
  7. Active community presence via Discord, Telegram, Twitter, Reddit, YouTube
  8. Security best practices partially implemented; opportunity to improve security headers
  9. WHOIS data is redacted, typical for privacy protection in crypto domains
  10. No suspicious or malicious content detected
Technical notes

Notes

The website is built using Webflow CMS, leveraging modern web technologies such as jQuery and Google Fonts for typography. It uses Plausible Analytics, a privacy-focused analytics service, indicating a commitment to user privacy. Hosting appears to be via Cloudflare or Webflow's infrastructure, ensuring fast performance and global availability. The site is mobile-optimized with responsive design and good accessibility features. SEO is well addressed with proper meta tags and Open Graph data. There is no evidence of technical debt or outdated libraries. Opportunities exist to enhance security headers and implement cookie consent mechanisms to align with 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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