# BeaverCheck Audit Report — https://www.sentry.io

**Date:** April 7, 2026  
**URL:** https://www.sentry.io  
**Overall Grade:** C (75/100)  
**Report:** https://beavercheck.com/results/b605fbf1-13b6-58d9-2112-43bad80def11

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** HSTS header is missing — Security > Security Headers
3. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
4. **[CRITICAL]** 1 control(s) without accessible label — Accessibility > Form Accessibility
5. **[CRITICAL]** 25 image-only link(s) without alt text — Accessibility > Link & Button Quality

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 0 |
| Accessibility | 89 |
| Best Practices | 96 |
| SEO | 100 |

---

## Security

### Security Headers (F — 10/100)

*2 of 10 headers properly configured*

- **[CRITICAL]** HSTS header is missing — Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year.
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN.
- **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is not present

### Content Security Policy (F — 0/100)

*No enforcing CSP policy found*

- **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

### TLS & Certificates (A+ — 100/100)

*TLS 1.3, 7 checks passed*

- **[PASS]** TLS 1.3 is used
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 43 days)
- **[PASS]** Certificate chain has 2 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 9 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## Advanced Security

### Subresource Integrity (F — 20/100)

*0 of 1 external resources have SRI*

- **[WARNING]** External script from plausible.io lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[PASS]** security.txt is present — good practice
- **[PASS]** No sensitive files exposed

### Email Security (F — 30/100)

*No DMARC*

- **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures.

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (C — 64/100)

*1.7 MB transferred, 51 requests*

- **[INFO]** Page weighs 3.3 MB (1.7 MB transferred)
- **[INFO]** 51 HTTP requests
- **[INFO]** Estimated 0.36 g CO2 per page load

### Third-Party Impact (D — 50/100)

*100% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 100% of page weight (1.7 MiB of 1.7 MiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (C — 60/100)

*22 images, 0 KB saveable*

- **[WARNING]** https://sentry.io/_astro/getting-started-img-right... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://sentry.io/_astro/getting-started-img-left.... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://sentry.io/_astro/ufo-abduction-image.CCCwe... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (F — 20/100)

*7698ms total JS execution*

- **[WARNING]** https://sentry.io/_astro/Welcome.astro_astro_type_...: 5771ms CPU time
- **[WARNING]** Unattributable: 998ms CPU time
- **[WARNING]** https://sentry.io/welcome/: 446ms CPU time
- **[WARNING]** https://plausible.io/js/script.tagged-events.js: 363ms CPU time
- **[INFO]** https://sentry.io/_astro/link-decorator.BP7leAsv.j...: 120ms CPU time
- **[WARNING]** Third-party scripts: 7698ms (100% of total)

### Font Loading (A+ — 100/100)

*6 fonts (104 KB)*

- **[INFO]** 6 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (A+ — 100/100)

*12 scripts, 0 KB unused*


### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*6 hints, 0 missing preconnects*

- **[PASS]** Page uses 6 resource hint(s)

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (A — 95/100)

*119 links checked, 118 healthy, 1 broken*

- **[WARNING]** 118 of 119 links are healthy
- **[WARNING]** Broken link: https://images.ctfassets.net — Found in <link href>. Returns HTTP 404.

### Mixed Content (A+ — 100/100)

*No mixed content detected — all resources use HTTPS.*

- **[PASS]** No mixed content detected — all resources use HTTPS

### Open Graph (A — 95/100)

*Open Graph tags are well configured for social sharing.*

- **[INFO]** Missing twitter:card — Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

### Structured Data (A+ — 100/100)

*3 JSON-LD block(s) found — structured data is well configured.*

- **[PASS]** Custom type "WebPage" — unable to validate specific properties
- **[PASS]** 3 JSON-LD blocks found

---

## Infrastructure

### DNS Records (A — 85/100)

*1 A records, 24 ms lookup*

- **[PASS]** Resolves to 1 IPv4 address(es)
- **[INFO]** Single A record — no DNS redundancy — Multiple A records provide failover if one server goes down.
- **[INFO]** No IPv6 (AAAA) records
- **[INFO]** No NS records found
- **[INFO]** No MX records — email not configured via DNS
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[INFO]** No SPF record found in TXT records — SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
- **[PASS]** DNS resolution time: 24 ms

### Redirect Chain (B — 70/100)

*2 redirect(s), 368 ms total*

- **[WARNING]** 2 redirects before reaching final URL — Each redirect adds latency. Try to minimize the chain to 1 hop.
- **[INFO]** WWW normalization redirect
- **[INFO]** Uses 302 (temporary) redirect — If permanent, use 301 instead.

### IPv6 Readiness (C — 60/100)

*No IPv6 support*

- **[INFO]** No IPv6 (AAAA) records found — IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

### Crawlability (A+ — 100/100)

*robots.txt present, sitemap with 3 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 3 entries
- **[PASS]** Sitemap index with 3 child sitemaps
- **[PASS]** robots.txt references sitemap

### URL Variants (A+ — 100/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[PASS]** www/non-www redirect configured correctly (preferred: www)
- **[PASS]** HTTP correctly 301-redirects to HTTPS

### Domain Intelligence (A+ — 100/100)

*sentry.io — via Gandi SAS, 14 years, 2 months old, hosted on Google Cloud*

- **[PASS]** Domain registered until Apr 7, 2027 (1 years remaining)
- **[PASS]** Registrar: Gandi SAS
- **[PASS]** Hosting: Google Cloud

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (B — 80/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[INFO]** No terms of service link detected
- **[INFO]** No cookie consent banner detected
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (A+ — 100/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[PASS]** width=device-width is set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (C — 55/100)

*2 trackers detected*

- **[INFO]** 2 third-party trackers detected — Found 2 analytics, 0 advertising, 0 marketing, 0 tag manager trackers.
- **[WARNING]** Trackers detected but no cookie policy found — This page loads 2 trackers but no cookie policy was detected. GDPR requires disclosure when using tracking cookies.
- **[WARNING]** Trackers detected but no privacy policy found — Most data protection regulations require a privacy policy when collecting user data via trackers.

---

## Legal

### Legal Page Ecosystem (C — 55/100)

*2 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at https://sentry.io/privacy/.
- **[PASS]** Terms of Service detected — Found at https://policies.google.com/terms.
- **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data.
- **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data.
- **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data.

### Copyright Notice (A+ — 100/100)

*© 2026 • Sentry is a registered Trademark of Functional S*

- **[PASS]** Copyright notice is up to date — Copyright notice is up to date: © 2026 • Sentry is a registered Trademark of Functional S
- **[PASS]** Copyright holder: • Sentry is a registered Trademark of Functional S

### Regulatory Indicators

*1 regulatory indicator(s) detected*

- **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments.
- **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.

### Third-Party Data Sharing

*0 third-party service(s) detected*

- **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows.
- **[INFO]** No recognized third-party data-sharing services detected — This page does not appear to load external tracking, analytics, or advertising scripts.

### Compliance Badges (C — 55/100)

*0 compliance badge(s) detected*

- **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges.

---

## Availability

### CDN & Delivery (D — 50/100)

*No CDN detected*

- **[WARNING]** No CDN detected — A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

### HTTP Caching (B — 70/100)

*private*

- **[PASS]** Cache-Control header is set
- **[INFO]** No ETag or Last-Modified header — Conditional requests (304 Not Modified) are not possible without validators.

### Transport Security (A — 85/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[PASS]** HTTP/3 (QUIC) supported — The server advertises HTTP/3 via Alt-Svc for faster connections on mobile networks.
- **[WARNING]** Missing Strict-Transport-Security header — HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks.
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (A+ — 100/100)

*9 landmarks*

- **[PASS]** <main> landmark present
- **[PASS]** 4 <nav> landmark(s) found
- **[PASS]** All <nav> elements are properly labeled
- **[PASS]** Skip navigation link present

### Heading Hierarchy (A+ — 95/100)

*37 headings*

- **[PASS]** Single H1 present
- **[WARNING]** 1 empty heading(s) — Empty headings appear in the document outline but provide no information.

### Alt Text Quality (A — 90/100)

*All 58 images OK*

- **[INFO]** 20 image(s) with alt text over 125 characters
- **[PASS]** 26 decorative image(s) correctly marked
- **[PASS]** 12 image(s) with good alt text

### Form Accessibility (A — 85/100)

*1 of 3 controls have issues*

- **[CRITICAL]** 1 control(s) without accessible label — Form controls need a <label>, aria-label, or aria-labelledby for screen readers.
- **[PASS]** 2 control(s) properly labeled

### Link & Button Quality (C — 68/100)

*208 links, 28 buttons — all OK*

- **[CRITICAL]** 25 image-only link(s) without alt text
- **[WARNING]** 7 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[PASS]** 176 link(s) with descriptive text

---

## UX

### 404 Error Page (F — 20/100)

*Soft 404 detected*

- **[CRITICAL]** Soft 404: server returns HTTP 200 for non-existent pages — The server returns HTTP 200 for a path that does not exist. Search engines will index these pages, diluting your real content. Configure your server to return a proper 404 status code for missing pages.

### Favicon & Branding (F — 15/100)

*1 icon(s) detected*

- **[WARNING]** No favicon.ico at site root — Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.
- **[PASS]** HTML icon links detected
- **[INFO]** No apple-touch-icon detected — iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.

### Web Manifest (F — 30/100)

*Invalid JSON*

- **[WARNING]** Manifest contains invalid JSON — Manifest at https://www.sentry.io/manifest.json contains invalid JSON. Browsers cannot parse it.

### Dark Mode Support (D — 45/100)

*Theme color only*

- **[INFO]** Theme-color present but no dark variant — A theme-color is set but no dark-specific variant was found. The browser toolbar may not adapt for dark mode users.
- **[INFO]** No dark mode signals detected — Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 30/100)

*1 navigation pattern(s)*

- **[PASS]** Skip navigation link detected
- **[PASS]** 4 navigation landmark(s) detected

---

## SEO

### Canonical URL (A — 85/100)

*Minor issues*

- **[PASS]** Canonical tag present
- **[WARNING]** Canonical does not match final URL (https://sentry.io:443/welcome/)
- **[PASS]** Canonical target returns 200
- **[INFO]** Canonical points to a different domain

### Meta Tags (A — 85/100)

*Title: 15 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is only 15 characters — consider expanding
- **[INFO]** Title and H1 have very different wording — Alignment helps users confirm they've reached the right page.

### Content Depth (A — 85/100)

*3281 words, Difficult*

- **[PASS]** Page has 3281 words — good depth for search engines
- **[INFO]** Text-to-HTML ratio is 3% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Difficult (grade 10)

### Internal Links (A+ — 95/100)

*1 internal, 207 external*

- **[PASS]** 1 internal links (0%)
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** Page has 208 links — consider reducing
- **[INFO]** 1 internal / 207 external links

### Image SEO (A+ — 100/100)

*58 images, 33 descriptive filenames*

- **[INFO]** 25 image(s) have hash/generic filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (A — 85/100)

*0.41g CO2 per view*

- **[PASS]** 0.41g CO2 per page view — This page transfers 1.7 MB, producing an estimated 0.41g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.32g.
- **[INFO]** At 10,000 monthly views: 49.4 kg CO2/year — With 10,000 page views per month, this page would generate approximately 49.4 kg of CO2 annually — equivalent to charging 6169 smartphones.
- **[PASS]** Green hosting reduces data center emissions

### Green Hosting (B — 80/100)

*Green (hosting)*

- **[PASS]** Google Cloud uses renewable energy
- **[INFO]** Google Cloud: Verified by the Green Web Foundation
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (A+ — 100/100)

*91% cached*

- **[PASS]** 91% reduction on repeat visits — Returning visitors download only 166 KB (vs 1779 KB first visit). 50 of 51 resources are served from browser cache, saving 0.37g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.04g CO2 (first visit: 0.41g)

### Carbon Budget (B — 70/100)

*31th percentile*

- **[PASS]** 0.41g CO2 — below the sustainability target of 0.50g — Cleaner than an estimated 69% of websites analyzed. This page meets the Web Sustainability Guidelines target.
- **[INFO]** Estimated 31th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (A+ — 100/100)

*100% efficient*

- **[PASS]** Transfer efficiency: 100% — Only 0 KB of potential savings identified. Your page is well-optimized for size.

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/b605fbf1-13b6-58d9-2112-43bad80def11*