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Security report for sumo.com

AppSumo · Technology · N/a

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

70/100

Risk levelMedium

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

AppSumo is a well-established online marketplace founded in 2010 that specializes in offering discounted software deals and digital products primarily targeting entrepreneurs, marketers, content creators, and ecommerce businesses. The platform features a wide range of AI-powered tools, productivity software, and educational courses, positioning itself as a leading marketplace for business software with a strong brand presence and a loyal customer base. The website demonstrates a high level of digital maturity, utilizing modern web technologies such as Next.js and hosting on Amazon AWS infrastructure, ensuring fast performance and excellent mobile optimization. Security posture is solid with HTTPS enforced and domain registration protections in place, although there is room for improvement in DNSSEC adoption and security headers implementation. Privacy compliance is supported by comprehensive privacy and terms of service policies, but the absence of a cookie consent mechanism is a minor gap. Overall, AppSumo presents a professional, trustworthy, and user-friendly platform with strong business credibility and a clear focus on delivering value to its target audience.

Scanned

This is an earlier scan of sumo.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
65/ 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

6 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 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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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. 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

    • 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

Need hands-on remediation? Email guard@offseq.com

Keep watching sumo.com

This scan found 22 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
67
Security headers
15
Email security
85
DNS health
85
Network security
100
GDPR outside view
65
Average
70

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

AppSumo operates a marketplace business model that leverages partnerships with software vendors to offer lifetime deals and exclusive discounts to its users. Its competitive advantage lies in its curated selection of high-quality software deals, strong brand recognition, and a large community of over one million entrepreneurs. The company also owns several subsidiaries such as TidyCal, BreezeDoc, and SendFox, expanding its ecosystem. Revenue streams likely include commissions on sales, membership fees from AppSumo Plus, and affiliate marketing. The platform's marketing ecosystem includes Klaviyo for email marketing and analytics, and it maintains an active presence on major social media platforms. Strategic partnerships and a focus on AI tools position AppSumo well for future growth in the creator economy and digital business tools market.

Security posture

AppSumo's security posture is generally strong, with HTTPS enforced site-wide and domain registration protections such as clientDeleteProhibited and clientTransferProhibited statuses. However, the lack of DNSSEC implementation and absence of visible security headers like Content-Security-Policy and X-Frame-Options represent areas for enhancement. No public security policy or incident response contacts were found, which could be improved to increase transparency and readiness. The site uses secure forms for data collection but does not display a cookie consent mechanism, which is important for GDPR compliance. No vulnerabilities or exposed sensitive data were detected in the analysis. Overall, the security maturity is good but could benefit from formalized policies and additional technical controls.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement and publish a comprehensive security policy and incident response contact information.
  3. Add security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to improve protection against common web attacks.
  4. Introduce a cookie consent banner/mechanism to comply fully with GDPR and other privacy regulations.
  5. Regularly audit third-party scripts and dependencies to ensure no vulnerable libraries are in use.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
AppSumo
Description
Top software deals for entrepreneurs at incredible prices. Discover the latest productivity, marketing, and content tools for your business with no monthly fees.
Key services
Software deals marketplace, AI tools marketplace, Courses and digital products, AskSumo AI personal shopper, AppSumo Plus membership
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, CSS, AWS (Amazon Registrar, AWS DNS servers), Klaviyo (marketing and analytics scripts)
Frameworks
Next.js
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enabled
  • Domain status includes clientDeleteProhibited, clientTransferProhibited, clientUpdateProhibited

Analytics and tracking

Services
Klaviyo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Klaviyo
Marketing tools
Klaviyo
Transparency
good

Site quality

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

Key observations

  1. Website is a professional, well-established marketplace for software deals targeting entrepreneurs and businesses.
  2. Strong branding and consistent design with clear navigation and rich content.
  3. Use of modern web technologies and hosting on AWS.
  4. No signs of blocking or WAF challenges.
  5. Privacy and terms policies are present and comprehensive.
  6. No direct contact emails or phone numbers found; contact primarily via forms and help center.
  7. Social media presence is strong and consistent with brand.
  8. No explicit security policy or incident response contact publicly disclosed.
  9. No cookie consent mechanism detected despite GDPR compliance claims.
  10. DNSSEC not enabled, which is a minor security gap.
Technical notes

Notes

The website is built using modern web technologies including React and Next.js, hosted on Amazon AWS infrastructure, which supports scalability and performance. The site is well-optimized for mobile devices and demonstrates fast loading times. SEO best practices are followed with proper meta tags, Open Graph tags, and structured data (JSON-LD) for organization and social media integration. The use of Klaviyo scripts indicates integrated marketing automation and analytics capabilities. No CMS was explicitly detected, suggesting a custom or proprietary content management solution. The technical implementation is robust with minor opportunities for improvement in security headers and DNS security.
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. 69/100 −1Medium31 findingsView report
  2. 70/100 −1Medium31 findingsView report
  3. 71/100Medium30 findingsView report
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