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Security report for customer.io

Peaberry Software Inc. · Technology · United States

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

72/100

Risk levelMedium

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

Customer.io, operated by Peaberry Software Inc., is a mature and reputable SaaS platform specializing in AI-powered customer engagement and marketing automation. The platform enables businesses to create personalized multi-channel customer journeys fueled by first-party data. It serves a broad business audience, from startups to enterprises, and is trusted by over 8,000 brands globally. The website demonstrates a high level of digital maturity with modern technologies such as Next.js, React, and AWS hosting, complemented by extensive analytics and marketing integrations. Security posture is strong with HTTPS, security headers, and domain transfer protections, although explicit privacy and security policies are not prominently published. Overall, the platform presents a professional, trustworthy, and technically sound presence with room for improvement in privacy transparency and incident response disclosures.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 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 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

  3. 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

  4. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Domain Expires Soon

      Domain expires in 18 days

      What to do: Renew domain registration before expiration

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

Keep watching customer.io

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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Full report

€39.90one-time

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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
72
Security headers
30
Email security
80
DNS health
65
Network security
100
GDPR outside view
85
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

Customer.io holds a strong market position as a technology provider in marketing automation, leveraging AI to enhance messaging and campaign effectiveness. Its business model is subscription-based SaaS, targeting businesses seeking to optimize customer communication across email, push, SMS, and in-app channels. The company emphasizes data integration and activation, supporting unlimited data sources and destinations. Trust signals include certifications (AICPA, HIPAA, GDPR), customer testimonials, and a free trial offering. The platform's ecosystem includes partnerships and integrations with major ad networks and analytics providers, reflecting a mature and scalable operation. Growth indicators such as increased transaction rates and engagement metrics are highlighted, supporting its competitive advantage.

Security posture

The website and platform exhibit a robust security posture with enforced HTTPS, multiple security headers, and domain transfer restrictions. The absence of DNSSEC is a minor gap. No vulnerabilities or exposed sensitive data were detected in the analysis. However, the lack of a publicly available security policy, incident response contacts, or vulnerability disclosure program limits transparency and preparedness perception. Cookie consent is implemented via Cookiebot, supporting GDPR compliance. Overall, the security maturity is good but could be enhanced by publishing formal security and incident response documentation and enabling DNSSEC.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service prominently on the website.
  2. Add a dedicated security policy page detailing frameworks, controls, and incident response procedures.
  3. Implement and publish a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Enable DNSSEC on the domain to strengthen DNS security.
  5. Regularly review and audit third-party scripts and marketing tools to minimize security risks.

Contact details published on the site

Addresses
Legal name
Peaberry Software Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Peaberry Software Inc.
Description
Customer.io is a data-driven platform for personalized customer journeys across all channels, fueled by first-party data. It offers AI-powered customer engagement, automation, data integrations, and content creation tools.
Key services
Customer messaging automation, Data integrations and routing, Multi-channel campaigns (email, push, SMS, in-app), AI-powered insights and content creation, Analytics and conversion tracking
Content quality
excellent
Branding
consistent

Technology

Stack
Next.js, React, AWS DNS, Google Analytics, Microsoft Clarity, Cookiebot, ZoomInfo, Salesloft, FingerprintJS
Frameworks
Next.js
Platforms
AWS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Use of security headers
  • Cookie consent mechanism
  • No exposed sensitive data detected

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, G2 Crowd Attribution, Salesloft, FingerprintJS
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Bing Ads, Reddit Ads, Twitter Ads, LinkedIn Ads, Google Ads
Tracking pixels
Microsoft Clarity, Salesloft, G2 Crowd Attribution
Marketing tools
Cookiebot, ZoomInfo, Salesloft, FingerprintJS
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 no blocking detected.
  2. Strong use of modern web technologies and frameworks.
  3. Comprehensive marketing automation platform with AI features.
  4. Good security posture with HTTPS and security headers.
  5. Cookie consent implemented via Cookiebot.
  6. No explicit privacy policy or terms of service links found on main page.
  7. WHOIS data is transparent and consistent with business identity.
  8. Multiple trusted certifications displayed (AICPA, HIPAA, GDPR).
  9. Extensive use of third-party marketing and analytics tools.
  10. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on a modern tech stack including Next.js and React, hosted on AWS infrastructure. It leverages multiple third-party analytics and marketing tools such as Google Analytics, Microsoft Clarity, Cookiebot, and ZoomInfo. The site is well optimized for performance and mobile responsiveness, with good SEO and accessibility practices. The domain is mature and well managed, with consistent WHOIS data. Technical risks are minimal, but reliance on numerous external scripts requires ongoing security vigilance. The platform's technical infrastructure supports scalability and high availability, as evidenced by uptime and API call metrics.
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. 72/100 −3Medium30 findingsView report
  2. 75/100 −2Medium29 findingsView report
  3. 77/100Low26 findingsView report
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