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Security report for replit.com

Replit · Technology · N/a

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

71/100

Risk levelMedium

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

Replit is a well-established technology company founded in 2011, providing an AI-powered platform for building professional web applications and websites. The platform targets a broad audience including developers, teams, founders, and product managers, offering services such as app building, collaboration, and deployment. The website demonstrates a strong market position with over 40 million app creators and notable enterprise customers including Fortune 500 companies. Technically, the site uses modern frameworks like Next.js and React, hosted on Cloudflare, and integrates multiple analytics and advertising tools. The website is fast, mobile-optimized, and professionally designed, providing an excellent user experience. Security posture is good with HTTPS and domain transfer protections, but lacks DNSSEC and published security policies. Privacy compliance is basic, with no explicit privacy or cookie policies found, and extensive user tracking is present. Overall, the site is trustworthy and professional but could improve transparency on privacy and security policies.

Scanned

This is an earlier scan of replit.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  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 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 replit.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
75
Security headers
30
Email security
85
DNS health
80
Network security
100
GDPR outside view
53
Average
71

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

Replit operates as a Platform as a Service (PaaS) in the technology sector, focusing on AI-enhanced software development tools. Its business model revolves around providing a collaborative online IDE and deployment platform, monetized likely through subscriptions and enterprise services. The company has a large user base and strong partnerships with major technology firms, indicating competitive advantages in AI integration and ease of use. The target customers range from individual developers to large enterprises, with a focus on accelerating software delivery and innovation. The presence of customer testimonials and case studies highlights growth and market acceptance. The company does not publicly disclose parent or subsidiary relationships in the analyzed content.

Security posture

Replit's security posture is solid with mandatory HTTPS, domain transfer lock, and reputable registrar usage. However, the absence of DNSSEC reduces DNS security. No explicit security policies, incident response plans, or vulnerability disclosure mechanisms are published on the site, which could hinder transparency and trust for security-conscious users. The extensive use of third-party tracking and advertising pixels raises privacy concerns, especially without clear cookie consent mechanisms. No exposed sensitive data or vulnerable libraries were detected in the content. Overall, the security maturity is good but could be enhanced by publishing formal security documentation and improving privacy compliance.

Recommendations

  1. Enable DNSSEC to enhance DNS security and prevent spoofing.
  2. Publish comprehensive privacy and cookie policies with explicit GDPR compliance and consent mechanisms.
  3. Add a dedicated security policy page including incident response and vulnerability disclosure information.
  4. Implement a security.txt file to facilitate responsible vulnerability reporting.
  5. Provide direct security contact channels such as security@ or abuse@ email addresses to improve incident response readiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Replit
Description
Replit is an AI-powered platform for building professional web apps and websites.
Key services
AI-powered app building, Collaboration tools, Deployments, App, website, game, dashboard, chatbot builders
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, CSS, Cloudflare DNS, Google Analytics, TikTok Pixel, Twitter Ads, LinkedIn Insight, Reddit Pixel, Hotjar
Frameworks
Next.js
Platforms
Cloudflare
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enabled
  • Domain status clientTransferProhibited
  • No DNSSEC (not enabled)

Analytics and tracking

Services
Google Analytics, Hotjar, TikTok Analytics, Twitter Analytics, LinkedIn Analytics, Reddit Analytics
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
TikTok Ads, Twitter Ads, LinkedIn Ads, Reddit Ads
Tracking pixels
TikTok Pixel, Hotjar, Twitter Pixel, LinkedIn Insight, Reddit Pixel
Marketing tools
Hotjar
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 professional design.
  2. No explicit privacy or cookie policies found on the main page or header navigation.
  3. Contact information is primarily via contact forms; no direct emails or phone numbers found.
  4. Strong presence of third-party analytics and advertising pixels indicating extensive user tracking.
  5. No security.txt or vulnerability disclosure information found.
  6. No explicit security or incident response policies published.
  7. WHOIS data shows a well-established domain with no privacy protection, consistent with a legitimate business.
Technical notes

Notes

The website is built using modern web technologies including React and Next.js, ensuring good performance and SEO optimization. Hosting and DNS are managed by Cloudflare, providing robust infrastructure and DDoS protection. The site loads quickly and is fully responsive on mobile devices. Multiple third-party analytics and advertising scripts are integrated asynchronously to minimize performance impact. No CMS was explicitly detected, suggesting a custom or headless CMS approach. The technical implementation is mature with minor opportunities for improvement in DNS security and privacy compliance.
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. 73/100Medium26 findingsView report
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