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Security report for simpli.fi

Programmatic DSP & Advertising Automation Platform | Simpli.fi · Technology · United States

Medium risk. 5 critical or high findings in Security headers and SSL/TLS.

Security score

72/100

Risk levelMedium

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

Simpli.fi is a leading advertising technology company specializing in programmatic demand-side platform (DSP) and advertising automation solutions. The company serves over 2,000 agencies and brands, helping them maximize advertising relevance and measurable results across multiple channels including CTV, addressable TV, mobile, display, native, audio, and social media. Their market position is strong within the AdTech industry, supported by a mature domain established in 2011 and a comprehensive digital presence. Technically, the website leverages modern web frameworks such as React and Next.js, with integrations of multiple analytics and marketing tools including Google Tag Manager, Microsoft Clarity, Facebook Pixel, and LinkedIn Insight Tag. The site is hosted likely on WP Engine, optimized for performance, mobile responsiveness, and accessibility, reflecting a high level of digital maturity. From a security perspective, the site enforces HTTPS, employs multiple security headers, and integrates reCAPTCHA for form security. Privacy compliance is robust with clear privacy and cookie policies and a consent mechanism in place. However, there is no publicly available security policy or incident response contact, and DNSSEC is not implemented, which could be areas for improvement. Overall, Simpli.fi presents a professional, trustworthy, and secure online presence with strong business credibility and compliance posture. Strategic recommendations include implementing DNSSEC, publishing a formal security policy and incident response contacts, and considering a vulnerability disclosure program to enhance transparency and security readiness.

Scanned

This is an earlier scan of simpli.fi. View the latest report

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

5 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. 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
    • 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

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

Keep watching simpli.fi

This scan found 20 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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Full report

€39.90one-time

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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
52
Security headers
15
Email security
85
DNS health
90
Network security
100
GDPR outside view
88
Average
72

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

Simpli.fi operates in the competitive AdTech sector, focusing on programmatic advertising and automation platforms. Their business model revolves around providing technology solutions to agencies and brands for targeted media buying and campaign management. The company’s competitive advantages include a broad multi-channel platform, extensive integrations, and a large client base. Revenue streams likely include platform subscriptions, managed services, and campaign execution fees. The target customers are advertising agencies, brand marketers, and media buyers. Growth indicators include continuous platform enhancements and educational resources. The partnership ecosystem includes major analytics and advertising platforms. The company maintains a strong market presence with consistent branding and professional content.

Security posture

Simpli.fi demonstrates a mature security posture with HTTPS enforcement, comprehensive security headers, and secure form implementations including reCAPTCHA. The presence of cookie consent and privacy policies indicates GDPR compliance efforts. No critical vulnerabilities or exposed sensitive data were detected in the website content. However, the absence of a public security policy, incident response contact, and vulnerability disclosure program suggests room for improvement in transparency and incident readiness. DNSSEC is not enabled, which is a recommended enhancement for DNS security. Overall, the security posture is strong but could benefit from formalized policies and disclosure mechanisms.

Recommendations

  1. Implement DNSSEC to enhance DNS integrity and security.
  2. Publish a comprehensive security policy and incident response contact information on the website.
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Regularly audit third-party scripts and libraries to ensure no vulnerabilities are introduced.
  5. Enhance transparency by providing data retention policies and detailed privacy compliance documentation.

Contact details published on the site

Addresses
Legal name
101domain GRS Limited
Registration number
532923
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Programmatic DSP & Advertising Automation Platform | Simpli.fi
Description
Simpli.fi, the leader in advertising success, helps 2,000+ agencies & brands maximize their relevance with measurable results.
Key services
Programmatic DSP, Advertising automation, Media buying solutions, Software management solutions
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Google Tag Manager, Microsoft Clarity, Facebook Pixel, LinkedIn Insight Tag, Bing Ads, FullStory, HubSpot Analytics
Frameworks
Next.js, React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Secure forms with reCAPTCHA v2
  • Cookie consent mechanism implemented

Analytics and tracking

Services
Google Analytics, HubSpot Analytics, Microsoft Clarity, FullStory, LinkedIn Insight Tag
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Bing Ads, Google Ads
Tracking pixels
Facebook Pixel, LinkedIn Insight Tag, Microsoft Clarity, FullStory
Marketing tools
HubSpot Analytics
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 no blocking or WAF challenge.
  2. Professional and comprehensive content focused on advertising technology.
  3. Strong use of modern web technologies and analytics tools.
  4. Good privacy and cookie compliance with consent mechanisms.
  5. No security policy or incident response contact publicly found.
  6. WHOIS data is transparent and consistent with business profile.
  7. No adult or questionable content detected.
Technical notes

Notes

The website is built on a modern technology stack including React and Next.js, ensuring fast and responsive user experience. Integration with multiple analytics and marketing tools supports data-driven decision making. Hosting appears to be on a reputable managed WordPress platform (WP Engine), contributing to performance and security. The site is well-optimized for mobile devices and accessibility standards. Technical debt appears minimal with up-to-date libraries and frameworks. Opportunities exist to further modernize DNS security with DNSSEC and to formalize security documentation. Overall, the technical infrastructure supports the business goals effectively with low risk to operational continuity.
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. 68/100 −4Medium30 findingsView report
  2. 72/100 +2Medium28 findingsView report
  3. 70/100Medium26 findingsView report
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