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Security report for sellsy.com

Sellsy · Technology · France

Medium risk. 8 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

50/100

Risk levelMedium

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

Sellsy is a French SaaS company providing a comprehensive CRM and business management suite tailored for small and medium enterprises (TPE/PME). Their platform integrates sales, invoicing, marketing automation, and treasury management into a single interface, emphasizing French sovereignty, security, and intelligent automation. The company has a strong market position in France with over 22,000 business customers and a focus on GDPR compliance and data security. Technically, the website is built on modern web technologies including Webflow CMS, JavaScript frameworks, and integrates multiple third-party services such as HubSpot for forms, Intercom for support chat, and Microsoft Clarity for analytics. The site is well optimized for performance, mobile responsiveness, and accessibility, with a professional design and clear navigation. From a security perspective, Sellsy enforces HTTPS, employs standard security headers, and provides clear privacy and cookie policies with consent mechanisms. No critical vulnerabilities or exposed sensitive data were detected. However, the site could improve by publishing a security.txt file and providing explicit incident response contact emails. Overall, Sellsy presents a mature, trustworthy, and professional online presence aligned with its business claims. The domain registration data supports the legitimacy and longevity of the business. Strategic recommendations include enhancing transparency on security incident handling and further accessibility improvements.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 100 · Critical
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

8 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.

    • Critical

      No HTTPS encryption

      GDPR requires appropriate security measures for personal data

      What to do: Implement SSL/TLS certificate for HTTPS

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  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.

    • Critical

      No HTTPS Encryption

      Website does not use HTTPS encryption, making all data transmission vulnerable to interception

      What to do: Implement SSL/TLS certificate and redirect all HTTP traffic to HTTPS

  3. 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 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';…

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

Keep watching sellsy.com

This scan found 21 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

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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
0
Security headers
30
Email security
80
DNS health
80
Network security
100
GDPR outside view
10
Average
50

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 sellsy.com, from OffSeq Breach.

Total records
2,100
Employees
0
Customers
2,087
Third parties
13
Weak passwords
6%

17 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 sellsy.com.

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

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Technical appendix

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

Business context

Business profile

Sellsy operates in the technology sector, specifically SaaS for CRM and business management targeting French SMEs. Their business model is subscription-based software with additional services such as onboarding, training, and consulting. The company leverages partnerships with major payment processors and collaboration platforms to enhance its offering. The presence of extensive resources, testimonials, and certifications supports a strong market reputation. Growth indicators include a large client base and continuous product innovation with AI integration. The company maintains a French-centric approach, emphasizing data sovereignty and compliance, which differentiates it in the market.

Security posture

The website demonstrates a solid security posture with HTTPS enforcement, comprehensive cookie consent, and GDPR compliance. Security headers are present, and no sensitive data leaks were found in the HTML content. The use of third-party scripts is standard for marketing and analytics but appears well managed. The absence of a security.txt file and explicit incident response contacts are minor gaps. Overall, the security maturity is high for a SaaS provider, with a focus on protecting customer data and business continuity.

Recommendations

  1. Publish a security.txt file at the root domain to facilitate vulnerability disclosures.
  2. Provide explicit security incident response contact emails (e.g., security@ or abuse@).
  3. Enhance accessibility by adding ARIA landmarks and improving keyboard navigation.
  4. Add visible company phone contact information for improved trust and support.
  5. Regularly audit third-party scripts for vulnerabilities and privacy compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sellsy
Description
La Suite CRM Sellsy est une solution française de gestion commerciale et financière. Vente, Facturation & Comptabilité, Trésorerie et Marketing sont réunis dans une seule et même interface.
Key services
CRM, Facturation électronique, Marketing automation, Trésorerie management
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, GSAP, Lottie animations, HubSpot Forms, Didomi Consent Management, Intercom chat, Google Tag Manager, Microsoft Clarity
Frameworks
Webflow
Platforms
Vimeo (video hosting)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in
  • No exposed sensitive data in HTML
  • Use of security policy pages

Analytics and tracking

Services
Microsoft Clarity, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Beyable
Tracking pixels
Trustpilot, Microsoft Clarity, Didomi
Marketing tools
HubSpot Forms, Intercom, Wisepops
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 and professionally designed.
  2. Strong focus on French market with French language and French hosting.
  3. Comprehensive cookie and privacy consent mechanisms implemented.
  4. Multiple integrations with major platforms and payment providers.
  5. Active use of modern marketing and analytics tools.
  6. Clear business focus on CRM and business management for SMEs.
  7. Good presence of trust signals including testimonials and certifications.
  8. No critical security issues or vulnerabilities detected in the content.
Technical notes

Notes

The website uses a modern tech stack including Webflow CMS, JavaScript libraries like GSAP and Lottie for animations, and integrates marketing and analytics tools such as HubSpot Forms, Intercom, Microsoft Clarity, and Google Tag Manager. Hosting is via Webflow's CDN, ensuring fast load times and global availability. The site is mobile-optimized and SEO-friendly with proper meta tags and Open Graph data. Technical debt appears low, with clean HTML and CSS, though continuous monitoring of third-party dependencies is advised to mitigate risks.
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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