Is stackblitz.com Safe? Security Analysis for StackBlitz, Inc.
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Below Technology avg (72)
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
StackBlitz, Inc. operates a leading browser-based integrated development environment (IDE) platform that enables web developers to create and launch applications instantly without local setup. The company leverages innovative WebContainers technology to run full development environments securely within the browser, positioning itself as a market innovator with adoption by major technology companies. The website reflects a mature, professional business with clear branding and comprehensive service offerings targeting frontend and product teams. Technically, the site uses modern frameworks like Astro and integrates multiple analytics and marketing tools, hosted on Cloudflare infrastructure, delivering fast and mobile-optimized user experiences. Security posture is strong with HTTPS and domain transfer protections, though improvements are recommended in DNSSEC, security headers, and published security policies. Privacy compliance is adequate with clear privacy and terms pages but lacks cookie consent mechanisms despite tracking usage. Overall, the site is trustworthy, professional, and well-positioned in the technology sector.
Detected Technologies
10 urgent findings need attention
10 high
- + 2 more findings in the full report below
Keep stackblitz.com under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
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Security Headers
6 findings
30/100
GDPR Compliance
4 findings
53/100
NIS2 Compliance
9 findings
2/100
Email Security
1 finding
90/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
StackBlitz holds a competitive advantage through its proprietary WebContainers technology, enabling faster and more secure browser-based development environments compared to legacy cloud IDEs. Its business model centers on SaaS offerings including enterprise solutions, integrations, and APIs, targeting web developers and product teams at large enterprises and innovative companies. The company demonstrates strong market presence with endorsements from industry leaders and partnerships with major tech firms. Revenue streams likely include enterprise licensing, API usage, and premium services. The ecosystem includes related domains like bolt.new and webcontainers.io, indicating a growing product suite. Strategic observations highlight the company's focus on developer productivity and cloud-native innovation, with potential growth in enterprise adoption and platform integrations.
Security Posture Analysis
Comprehensive Security Assessment
StackBlitz exhibits a mature security posture with enforced HTTPS, domain transfer lock, and use of reputable DNS providers. No exposed sensitive data or vulnerable libraries were detected in the website content. However, the absence of DNSSEC and explicit security headers such as Content Security Policy or HSTS represents areas for enhancement. The lack of publicly available incident response or vulnerability disclosure policies limits transparency and readiness perception. Cookie consent mechanisms are missing despite use of tracking technologies, which may pose compliance risks under GDPR. Overall, the security maturity is good but could be improved by formalizing security policies, enhancing DNS security, and implementing privacy controls.
Strategic Recommendations
Priority Actions for Security Improvement
Enable DNSSEC on the domain to strengthen DNS security and prevent spoofing.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
StackBlitz, Inc.
StackBlitz is the collaborative browser-based IDE for web developers. It eliminates time-consuming local configuration and lets developers spend more time building.
excellent
consistent
Technical Stack
fast
excellent
good
good
Security Assessment
- HTTPS enforced
- Domain status clientTransferProhibited
- No exposed sensitive data in HTML
- Use of modern secure technologies
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with rich content and modern design.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing Strict-Transport-Security header
HIGHForces HTTPS connections
Missing X-Frame-Options header
HIGHPrevents clickjacking attacks
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
Sensitive data may be cached
LOWCache-Control header should include "no-store" for sensitive pages
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
No Data Protection Officer mentioned
LOWLarge organizations may need to designate a DPO under GDPR
Privacy policy may not be GDPR compliant
MEDIUMPrivacy policy lacks explicit GDPR compliance elements
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
HIGHDetected sectors: energy, transport, health, digital
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
DMARC not enforcing
MEDIUMDMARC policy is set to "none"
SPF Details
DKIM Selectors Found
DMARC Details
MTA-STS Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Partial SSL/TLS Assessment
LOWCompleted 2 of 4 security checks due to time constraints
Certificate Details
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
Domain Delete Lock Not Enabled
LOWDomain can be deleted without additional verification
DMARC Policy Set to None
LOWDMARC is configured but not enforcing any policy
Domain Registration Details
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports
How does stackblitz.com compare?
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🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.
SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
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