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Security report for justcall.io

Justcall · Technology · United States

Medium risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

74/100

Risk levelMedium

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

JustCall is a leading cloud-based business communication platform focused on providing AI-powered voice, SMS, email, and WhatsApp communication solutions for sales and customer support teams. The company offers a comprehensive suite of services including cloud phone systems, AI voice agents, sales dialers, and extensive integrations with over 100 business tools. Their market position is strong, supported by numerous customer testimonials, industry awards, and a high rating on G2. Technically, the website employs modern frameworks such as React, integrates with multiple analytics and marketing tools, and uses HubSpot CMS for content management. The site is well-optimized for mobile and SEO, with good performance metrics. Security-wise, JustCall demonstrates a mature posture with enforced HTTPS, multiple compliance certifications (SOC 2, HIPAA, GDPR, etc.), and a robust cookie consent mechanism. No critical vulnerabilities or exposed sensitive data were detected, indicating a secure environment. Overall, the website reflects a professional, trustworthy, and compliant business with a strong digital presence.

Scanned

This is an earlier scan of justcall.io. View the latest report

NIS2 and GDPR posture

GDPR outside view
100/ 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

3 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. 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

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

Keep watching justcall.io

This scan found 21 issues across 5 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
67
Security headers
40
Email security
65
DNS health
70
Network security
100
GDPR outside view
100
Average
74

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

JustCall operates in the technology sector, targeting sales and customer support teams across various industries including real estate, healthcare, education, and financial services. Their business model is SaaS-based, offering subscription plans with a free trial period. The company emphasizes AI-driven automation and multi-channel communication to enhance customer engagement and operational efficiency. Their partnership ecosystem includes solution, technology, and affiliate partnerships, enhancing their market reach. The presence of detailed resources, case studies, and a partner portal indicates a mature and growth-oriented business strategy. The company is headquartered in the United States with a large customer base and a significant number of integrations, positioning them as a competitive player in the business communication platform market.

Security posture

JustCall exhibits a strong security posture with multiple industry-standard certifications such as SOC 2 Type 2, HIPAA, GDPR, FedRamp, and PCI-DSS, reflecting compliance with stringent data protection and privacy requirements. The website enforces HTTPS and implements cookie consent mechanisms aligned with GDPR. While explicit security headers were not fully confirmed in the HTML content, the presence of these certifications and privacy policies suggests adherence to best practices. No exposed credentials, sensitive data leaks, or known vulnerabilities were identified. However, the absence of a public security.txt or explicit incident response contact information is noted. Overall, the security maturity is high, supporting trustworthiness and regulatory compliance.

Recommendations

  1. Implement and publicly document security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance browser security.
  2. Publish a security.txt file or dedicated vulnerability disclosure page to facilitate responsible reporting of security issues.
  3. Provide explicit incident response contact channels (e.g., security@ or abuse@ email addresses) on the website.
  4. Enhance accessibility features to meet WCAG standards for broader compliance and usability.
  5. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
Justcall
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Justcall
Description
Justcall is a cloud based business phone system for remote sales and customer support teams. Sign up for a free trial to use an international phone number to call customers remotely in seconds.
Key services
Cloud Phone System, AI Voice Agents, Sales Dialer, SMS & MMS Messaging, Call Recording, Integrations with 100+ business tools
Content quality
excellent
Branding
consistent

Technology

Stack
React (implied by react-helmet meta tags), jQuery, HubSpot Forms, Google Tag Manager, Amplitude Analytics, VWO (Visual Website Optimizer), OneTrust Cookie Consent, Intercom, Slick Carousel, Intl-Tel-Input, Select2
Frameworks
React
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security and compliance certifications
  • Cookie consent mechanism implemented
  • Form validation and email domain blocking on signup form

Analytics and tracking

Services
Google Tag Manager, Amplitude, HubSpot Analytics, VWO
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
HubSpot Ads Pixel, Poptin
Tracking pixels
Facebook Pixel, Amplitude, Smartlook, VWO
Marketing tools
HubSpot, Amplitude, VWO, Intercom, Poptin, GetKoala
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 challenges.
  2. Strong presence of AI-powered business communication solutions.
  3. Comprehensive integration ecosystem with 100+ integrations.
  4. Robust privacy and cookie policies with active consent mechanisms.
  5. Use of multiple analytics and marketing tools indicating mature digital marketing.
  6. Security certifications prominently displayed, indicating compliance focus.
  7. Multiple customer testimonials and awards enhance trust.
  8. Use of modern web technologies and responsive design.
  9. No exposed sensitive data or obvious security vulnerabilities detected.
Technical notes

Notes

The website utilizes a modern technology stack including React, jQuery, HubSpot CMS, and various third-party analytics and marketing tools such as Google Tag Manager, Amplitude, VWO, and Intercom. It employs responsive design techniques and is optimized for mobile devices. Performance is moderate with deferred loading of some scripts for page speed optimization. The site integrates multiple external services for marketing, analytics, and user engagement, indicating a mature digital infrastructure. Technical risks are minimal, but continuous monitoring of third-party dependencies is recommended to maintain security and performance.
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. 63/100 −11Medium24 findingsView report
  2. 74/100Medium26 findingsView report
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