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Security report for simpli.fi

Simpli.fi · Media · United States

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

Security score

70/100

Risk levelMedium

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

Simpli.fi is a leading programmatic advertising platform specializing in delivering targeted, measurable advertising solutions across multiple channels including CTV, addressable, geo-fencing, mobile, display, native, audio, and social media. The company serves over 2,000 agencies and brands, positioning itself as a trusted partner in the AdTech industry. Their platform integrates advanced data-driven technologies and AI to optimize media buying and workflow management, ensuring high relevance and performance for their clients. Technically, Simpli.fi employs a modern tech stack including React and Next.js, supported by a WordPress headless CMS and hosted on WPEngine. The site demonstrates excellent performance, mobile optimization, and accessibility, with comprehensive SEO and metadata implementations. They utilize a variety of analytics and marketing tools such as Google Analytics, Microsoft Clarity, Facebook Pixel, LinkedIn Insight Tag, and OneTrust for cookie consent management. From a security perspective, the website enforces HTTPS with strong SSL configurations and implements essential security headers. Forms are protected with Google reCAPTCHA, and privacy compliance is robust with clear privacy and cookie policies. No critical vulnerabilities or exposed sensitive data were detected, indicating a mature security posture. Overall, Simpli.fi presents a professional, trustworthy, and technically sound online presence. Their comprehensive content, clear contact information, and adherence to privacy and security best practices support a high level of business credibility and user trust.

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 19 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

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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
42
Security headers
15
Email security
85
DNS health
90
Network security
100
GDPR outside view
88
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

Simpli.fi operates in the media and advertising technology sector, offering a comprehensive programmatic DSP and advertising automation platform. Their competitive advantages include a broad suite of solutions covering multiple advertising channels and a strong focus on data-driven targeting and measurement. The business model is B2B SaaS, targeting agencies, brands, and media buyers. Revenue streams likely include platform subscriptions, managed services, and data partnerships. The company demonstrates growth through frequent content updates, industry awards, and strategic partnerships. Their ecosystem includes integrations with major ad networks and analytics providers, enhancing their market presence and service capabilities.

Security posture

Simpli.fi exhibits a strong security posture with mandatory HTTPS, comprehensive security headers, and use of reCAPTCHA on forms to prevent abuse. The presence of a cookie consent mechanism via OneTrust indicates compliance with privacy regulations such as GDPR. No exposed credentials or sensitive data were found in the website content. However, there is no explicit public security policy or incident response page, which could be improved. The company appears to have a mature security culture, but should consider publishing vulnerability disclosure information and enhancing transparency around security practices.

Recommendations

  1. Publish a dedicated security policy and incident response page to enhance transparency and user trust.
  2. Implement a security.txt file to facilitate responsible vulnerability disclosure.
  3. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  4. Enhance monitoring and alerting for phishing or abuse attempts related to the domain and services.
  5. Continue investing in privacy compliance and user data protection to maintain regulatory adherence.

Contact details published on the site

Addresses
Legal name
Simpli.fi
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Simpli.fi
Description
Simpli.fi is a leader in advertising success, helping over 2,000 agencies and brands maximize their relevance with measurable results. They provide a programmatic DSP and advertising automation platform that supports CTV, addressable, geo-fencing, mobile, display, native, audio, and social media advertising.
Key services
Demand-Side Platform (DSP), Addressable Advertising, Geo-Fencing, Connected TV (CTV), Media Planning and Management, Campaign Management, Performance and Analytics, Software Management Solutions
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Google Tag Manager, Google Analytics, Microsoft Clarity, Facebook Pixel, LinkedIn Insight Tag, OneTrust Cookie Consent, Bing Ads, Warmly, Vimeo (video hosting), HubSpot (forms and analytics), Recaptcha
Frameworks
Next.js, React
Platforms
WordPress (headless CMS), HubSpot
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • Use of HTTPS with valid SSL certificate
  • Implementation of Content Security Policy
  • Use of Google reCAPTCHA on forms
  • Cookie consent management with OneTrust
  • No exposed sensitive data in HTML
  • Use of security headers

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, HubSpot, FullStory, G2 Crowd
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Bing Ads, Facebook Ads, LinkedIn Ads, Google Ads
Tracking pixels
Facebook Pixel, LinkedIn Insight Tag, Microsoft Clarity, G2 Crowd Tracking, Warmly
Marketing tools
HubSpot, OneTrust, Vimeo, FullStory
Transparency
good

Site quality

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

Key observations

  1. The website is professionally designed with clear navigation and rich content.
  2. Strong emphasis on privacy and cookie compliance with OneTrust integration.
  3. Extensive use of modern analytics and marketing technologies.
  4. Comprehensive content including solutions, case studies, videos, and blog posts.
  5. Active social media presence with verified accounts.
  6. Contact information is clearly presented with multiple channels.
  7. No signs of WAF or content blocking; full access to site content.
  8. Security best practices are implemented including HTTPS and security headers.
Technical notes

Notes

The website is built on a modern, scalable infrastructure using Next.js and React, with a WordPress headless CMS backend. It is hosted on WPEngine, ensuring reliable performance and uptime. The site is well-optimized for mobile devices and accessibility, with fast loading times and proper SEO metadata. Integration with multiple analytics and marketing tools provides comprehensive data collection and user behavior insights. The technical implementation reflects a mature digital presence with minimal technical debt and good modernization practices, supporting the company's business objectives effectively.
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. 72/100Medium28 findingsView report
  3. 72/100Medium28 findingsView report
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