Skip to main content

Security report for blockchain.com

Blockchain.com · Finance · N/a

Low risk. 2 critical or high findings in Security headers and SSL/TLS.

Security score

85/100

Risk levelLow

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

Blockchain.com is a leading enterprise-level cryptocurrency platform offering services such as buying, trading, swapping, and securely storing Bitcoin, Ethereum, and other cryptocurrencies. The platform targets a broad audience of crypto investors and traders globally, positioning itself as a trusted and popular service in the digital finance sector. The website demonstrates a high level of professionalism with excellent content quality, clear navigation, and consistent branding. Technically, it leverages modern frameworks like Next.js and React, supported by robust analytics and marketing tools, ensuring a fast and responsive user experience across devices. Security posture is strong with HTTPS enforcement, comprehensive security headers, and a cookie consent mechanism aligned with GDPR requirements. However, the absence of publicly available WHOIS data and explicit contact information slightly reduces transparency and business credibility. Overall, Blockchain.com presents a secure, compliant, and user-friendly platform with a strong market presence in the cryptocurrency industry.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 100 · Low
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. 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 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. 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 blockchain.com

This scan found 14 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
77
Security headers
70
Email security
85
DNS health
85
Network security
100
GDPR outside view
95
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

Blockchain.com operates in the finance sector, specifically focusing on cryptocurrency exchange and wallet services. Its business model revolves around facilitating crypto transactions and providing secure storage solutions. The platform's market position is strong, being one of the most popular crypto services worldwide. Revenue streams likely include transaction fees, wallet services, and possibly advertising partnerships. The company employs extensive third-party analytics and marketing tools to optimize user engagement and advertising effectiveness. While no direct contact or corporate registration details are publicly visible, the platform's branding and service offerings indicate a mature and enterprise-scale operation. Partnerships with major ad networks and analytics providers further support its business ecosystem.

Security posture

The website exhibits a mature security posture with enforced HTTPS, multiple security headers (CSP, HSTS, X-Frame-Options, etc.), and a comprehensive cookie consent mechanism that supports GDPR compliance. No obvious vulnerabilities or exposed sensitive data were detected in the HTML content. However, the lack of a published security policy, incident response contacts, or vulnerability disclosure program represents an area for improvement. The use of multiple third-party tracking and advertising services introduces a moderate level of user tracking, which is transparently managed via consent. Overall, the platform balances security and privacy well but could enhance trust by publishing explicit security and incident response information.

Recommendations

  1. Publish a dedicated security policy page detailing security frameworks and practices.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure or security.txt file to encourage responsible reporting.
  4. Add visible and verified company contact information to improve business credibility and user trust.
  5. Continue to monitor and audit third-party scripts and cookies to minimize privacy risks and maintain compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Blockchain.com
Description
Buy Bitcoin, Ethereum, and other cryptocurrencies on a platform trusted by millions.
Key services
Buy Bitcoin, Buy Ethereum, Cryptocurrency wallet, Swap cryptocurrencies, Trade cryptocurrencies
Content quality
excellent
Branding
consistent

Technology

Stack
Next.js, React, Google Analytics, Hotjar, TikTok Pixel, Reddit Pixel, Google Tag Manager, Cloudflare (implied by CDN and security scripts)
Frameworks
Next.js, React
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • Use of CSP and other headers

Analytics and tracking

Services
Google Analytics, Hotjar
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Appsflyer, Google AdSense, TikTok, Reddit, Snapchat
Tracking pixels
Hotjar, TikTok Pixel, Reddit Pixel
Marketing tools
Appsflyer, Hotjar, TikTok, Reddit
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 cookie consent and privacy compliance mechanisms are in place.
  3. No direct contact emails or phone numbers found on the homepage or metadata.
  4. WHOIS data is unavailable or obscured, which reduces transparency but is common for high-profile domains.
  5. Use of multiple third-party analytics and advertising services with clear consent.
  6. No signs of adult or NSFW content; content is finance and crypto focused.
  7. Modern tech stack with Next.js and React, good SEO and accessibility.
  8. Security headers and HTTPS are properly configured.
Technical notes

Notes

Blockchain.com uses a modern and scalable technical infrastructure based on Next.js and React, ensuring fast page loads and excellent mobile optimization. The site is hosted behind AWS Cloudfront CDN, enhancing global performance and availability. Integration with multiple analytics and marketing platforms (Google Analytics, Hotjar, TikTok, Reddit, Appsflyer) indicates a sophisticated approach to user behavior analysis and advertising. The website is well-structured with proper meta tags, Open Graph data, and JSON-LD structured data for SEO. Accessibility features are present, contributing to a good user experience. No technical debt or deprecated libraries were detected in the provided HTML content. Overall, the technical implementation supports a high-quality, secure, and user-friendly platform.
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. 75/100Medium6 findings · partial scanView report
Reviews of this site

Share your experience with blockchain.com. 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 blockchain.com.

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.