Is protonmail.com Safe? Security Analysis for Proton AG
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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
Proton AG operates Proton Mail, the world's largest secure email service with over 100 million users, headquartered in Switzerland. The company offers a suite of privacy-focused services including encrypted email, calendar, cloud storage, password manager, VPN, and more, targeting privacy-conscious individuals, journalists, activists, and businesses. Proton's business model is freemium, providing free secure email accounts supported by paid subscription plans with enhanced features. The company is well-positioned in the privacy technology market, emphasizing Swiss privacy laws and open-source transparency. Technically, Proton's website employs modern web technologies including React and Astro frameworks, delivering a fast, mobile-optimized, and accessible user experience. The infrastructure supports multiple platforms including web, desktop, and mobile apps. SEO and content quality are excellent, reflecting a mature digital presence. Security-wise, Proton demonstrates strong practices with HTTPS enforcement, comprehensive security headers, end-to-end and zero-access encryption, and independent audits. However, DNSSEC is not enabled, and explicit incident response contacts or vulnerability disclosure pages are not found, representing minor gaps. Overall, Proton Mail's website and business exhibit high trustworthiness, professionalism, and compliance with privacy regulations such as GDPR. The risk profile is low, with no detected vulnerabilities or suspicious indicators. Strategic recommendations include enabling DNSSEC, publishing a security.txt file, and providing clearer incident response contacts to further enhance security posture and transparency.
Detected Technologies
8 urgent findings need attention
8 high
Keep protonmail.com under constant watch
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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
4 findings
65/100
GDPR Compliance
4 findings
53/100
NIS2 Compliance
8 findings
17/100
Email Security
3 findings
80/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
Proton AG holds a strong market position as a leading privacy-focused technology company, leveraging Swiss jurisdiction as a competitive advantage. Its freemium business model balances free user acquisition with paid subscriptions for advanced features. The company targets a diverse audience including individuals valuing privacy, journalists, activists, and enterprises requiring secure communications. Proton's ecosystem includes complementary services like VPN and password management, fostering cross-product adoption. Partnerships with services like Simple Login and Standard Notes expand its privacy portfolio. Growth indicators include over 100 million users and 50,000 business customers. The company maintains a transparent and open-source approach, enhancing credibility and community trust.
Extracted Contact Information
Marketing Intelligence Data
Physical Addresses (1)
Security Posture Analysis
Comprehensive Security Assessment
Proton Mail exhibits a mature security posture with robust encryption technologies ensuring end-to-end and zero-access protection. The website enforces HTTPS and implements multiple security headers to mitigate common web threats. Open-source codebases and independent audits reinforce security transparency. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of DNSSEC and a published security.txt file limits DNS security and vulnerability disclosure clarity. Incident response contact information is not explicitly provided, which could hinder rapid communication during security events. Overall, Proton demonstrates strong data protection practices aligned with GDPR and Swiss privacy laws, supporting a resilient security culture.
Strategic Recommendations
Priority Actions for Security Improvement
Enable DNSSEC on the proton.me domain to enhance DNS security and prevent spoofing.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
Proton AG
Proton provides easy-to-use encrypted email, calendar, cloud storage, password manager, and VPN services, built on the principle of your data, your rules.
excellent
consistent
Technical Stack
fast
excellent
good
excellent
Security Assessment
- HTTPS enforced
- End-to-end encryption
- Zero-access encryption
- Open source libraries
- Independent security audits
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with rich content and no blocking.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing X-Frame-Options header
HIGHPrevents clickjacking attacks
Weak X-XSS-Protection configuration
LOWCurrent value: "0"
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
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No DMARC reporting
LOWDMARC aggregate reports not configured
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
Strict DMARC Alignment
LOWStrict alignment may cause legitimate emails to fail
SPF Details
DMARC Details
MTA-STS Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 89 days
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
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
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 protonmail.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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PDF Report & Export
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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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