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Security report for backblaze.com

Backblaze · Technology · N/a

Low risk. 1 critical or high finding in SSL/TLS.

Security score

82/100

Risk levelLow

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

Backblaze operates as a leading cloud storage and backup service provider, offering scalable and cost-effective solutions for both enterprise and personal users. Their market position is strong, focusing on open cloud storage platforms and unlimited backup services. The website reflects a mature digital presence with modern technologies, comprehensive privacy and security policies, and a user-friendly interface. Security posture is robust with HTTPS, security headers, and CAPTCHA protections, though explicit incident response and vulnerability disclosure information are not publicly available. Overall, the risk profile is low with recommendations to enhance transparency in security communications. The technical infrastructure is modern and well-implemented, supporting fast performance and mobile optimization.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 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

1 finding rated critical or high. 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 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

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Keep watching backblaze.com

This scan found 15 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.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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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
55
Email security
85
DNS health
90
Network security
100
GDPR outside view
88
Average
82

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention backblaze.com, from OffSeq Breach.

Total records
22,334
Employees
2
Customers
22,265
Third parties
67
Weak passwords
8%

Latest record dated 2025-07-22 · 56 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for backblaze.com.

Select it in the checkout above.

Masked preview

  • –secure.backblaze.com2025-07-22
  • –secure.backblaze.com2025-07-20

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Backblaze targets a broad audience including businesses requiring enterprise-grade backup and personal users seeking unlimited cloud backup. Their business model is subscription-based cloud storage and backup services, with clear pricing and product segmentation. The company leverages partnerships and integrations to expand its ecosystem. The website content and structure indicate a well-established brand with consistent messaging and strong trust signals. Marketing and analytics tools are used responsibly with cookie consent mechanisms in place. The absence of WHOIS data is a notable anomaly but does not detract from the company's apparent legitimacy.

Security posture

The website demonstrates a high level of security maturity with enforced HTTPS, comprehensive security headers, and use of reCAPTCHA to protect forms. Cookie consent and privacy policies align with GDPR requirements. However, the lack of a public vulnerability disclosure program or security.txt file limits transparency. Incident response contact details are not explicitly provided, which could be improved to enhance trust and readiness. No vulnerabilities or exposed sensitive data were detected in the analyzed content. Overall, the security posture is strong but could benefit from enhanced communication of security processes.

Recommendations

  1. Publish a dedicated vulnerability disclosure or security.txt page to encourage responsible reporting.
  2. Provide explicit incident response contact information to improve transparency and trust.
  3. Consider listing security certifications and compliance attestations prominently.
  4. Maintain and regularly update privacy and cookie policies to reflect evolving regulations.
  5. Enhance monitoring of third-party scripts and analytics tools to minimize tracking risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Backblaze
Description
Backblaze is a pioneer in robust, scalable low cost cloud backup and storage services. Enterprise hot storage, low cost backup and archive, and more.
Key services
B2 Cloud Storage, Computer Backup (Business and Personal), Enterprise-grade backup solutions
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, Google Analytics, reCAPTCHA, jQuery, GSAP (GreenSock Animation Platform), IndexedDB, WebFont Loader, OneTrust Cookie Consent
Frameworks
Webflow CMS
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of reCAPTCHA for forms
  • Cookie consent with opt-in
  • IndexedDB usage with error handling
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Visual Website Optimizer
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Clearbit Scripts, Visual Website Optimizer
Tracking pixels
ZoomInfo
Marketing tools
OneTrust Cookie Consent
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 navigation
  2. Strong use of modern web technologies and analytics
  3. Comprehensive privacy and cookie policies with consent mechanisms
  4. No direct contact emails or phone numbers visible in main HTML, but contact forms and sales contact pages exist
  5. No visible security.txt or vulnerability disclosure page
  6. No WHOIS data available from raw output, unusual for a commercial domain
  7. No adult or questionable content detected
  8. Good SEO and accessibility practices observed
Technical notes

Notes

The website is built using Webflow CMS and incorporates modern JavaScript libraries such as jQuery, GSAP, and Google Tag Manager for analytics and marketing. Performance is optimized with asynchronous script loading and IndexedDB usage for local data storage. The site is mobile-optimized with responsive design and accessibility features. SEO is supported by proper meta tags and Open Graph data. Hosting provider details are not explicit but the use of CDN domains suggests a distributed content delivery approach. Overall, the technical implementation is modern, performant, and aligned 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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