# BeaverCheck Audit Report — https://slack.com

**Date:** April 4, 2026  
**URL:** https://slack.com  
**Overall Grade:** C (73/100)  
**Report:** https://beavercheck.com/results/9b53f2bf-56c0-456d-a77d-06f0458f7366

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
3. **[CRITICAL]** Page weighs 20.7 MB (13.0 MB transferred) — Performance > Page Weight Budget
4. **[CRITICAL]** 12 image-only link(s) without alt text — Accessibility > Link & Button Quality
5. **[WARNING]**  is missing width/height — may cause layout shift — Performance > Image Optimization

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 35 |
| Accessibility | 95 |
| Best Practices | 77 |
| SEO | 92 |

---

## Security

### Security Headers (C — 60/100)

*6 of 10 headers properly configured*

- **[PASS]** Strict-Transport-Security is properly configured
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[PASS]** X-Frame-Options is properly configured
- **[PASS]** Referrer-Policy is properly configured
- **[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.
- **[PASS]** Cross-Origin-Opener-Policy is properly configured
- **[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 present without version info

### 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 89 days)
- **[PASS]** Certificate chain has 2 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 2 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A — 85/100)

*3 cookies analyzed, 6 checks passed*

- **[PASS]** Cookie 'utm' has the Secure flag
- **[WARNING]** Cookie 'utm' is missing the HttpOnly flag — Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
- **[PASS]** Cookie 'utm' has SameSite=None
- **[PASS]** Cookie 'b' has the Secure flag
- **[WARNING]** Cookie 'b' is missing the HttpOnly flag — Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
- **[PASS]** Cookie 'b' has SameSite=None
- **[PASS]** Cookie 'x' has the Secure flag
- **[WARNING]** Cookie 'x' is missing the HttpOnly flag — Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
- **[PASS]** Cookie 'x' has SameSite=None

---

## Advanced Security

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

*0 of 44 external resources have SRI*

- **[WARNING]** External script from pi.pardot.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.redditstatic.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.mczbf.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from cdn.pdst.fm lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from trk.techtarget.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from tag.demandbase.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from t.contentsquare.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from snap.licdn.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.youtube.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from www.youtube.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from cdn.cookielaw.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from reveal.clearbit.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from cdn.cookielaw.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from googleads.g.doubleclick.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from googleads.g.doubleclick.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from pi.pardot.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from a.slack-edge.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from cdn.schemaapp.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from b-code.liadm.com 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 (A+ — 100/100)

*DMARC: reject*

- **[PASS]** DMARC policy is reject — strongest protection

### 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 (F — 0/100)

*13.0 MB transferred, 218 requests*

- **[CRITICAL]** Page weighs 20.7 MB (13.0 MB transferred)
- **[WARNING]** Images are 3.7 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[WARNING]** JavaScript is 2.1 MB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
- **[INFO]** Fonts are 239 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks.
- **[WARNING]** 218 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 2.7 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 (12.9 MiB of 13.0 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)

*79 images, 0 KB saveable*

- **[WARNING]** https://a.slack-edge.com/fd21de4/marketing/img/nav... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://a.slack-edge.com/fd21de4/marketing/img/nav... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://slack.com/marketing/img/homepage/true-pros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://slack.com/marketing/img/homepage/true-pros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://a.slack-edge.com/38f0e7c/marketing/img/nav... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://slack.com/marketing/img/homepage/true-pros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://a.slack-edge.com/c3ea545/marketing/img/hom... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://slack.com/marketing/img/homepage/true-pros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]**  is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://slack.com/marketing/img/homepage/true-pros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://slack.com/marketing/img/homepage/true-pros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://a.slack-edge.com/5cb5052/marketing/img/hom... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (F — 20/100)

*11199ms total JS execution*

- **[WARNING]** Unattributable: 2941ms CPU time
- **[WARNING]** https://slack.com/: 1944ms CPU time
- **[WARNING]** https://www.googletagmanager.com/gtm.js?id=GTM-KH2...: 1685ms CPU time
- **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-QTJQ...: 983ms CPU time
- **[WARNING]** https://t.contentsquare.net/uxa/eaf9ce4ae4903.js: 622ms CPU time
- **[WARNING]** Third-party scripts: 9255ms (83% of total)

### Font Loading (A+ — 100/100)

*7 fonts (239 KB)*

- **[INFO]** 7 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (F — 20/100)

*41 scripts, 567 KB unused*

- **[WARNING]** https://a.slack-edge.com/bv1-13-br/rollup-marketin...: 135 KB unused (73%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://t.contentsquare.net/uxa/eaf9ce4ae4903.js: 75 KB unused (54%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.googletagmanager.com/gtag/js?id=DC-114...: 59 KB unused (46%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.googletagmanager.com/gtag/destination?...: 59 KB unused (45%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://cdn.cookielaw.org/scripttemplates/202402.1...: 58 KB unused (55%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 567 KB

### 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)

*1 hints, 0 missing preconnects*

- **[PASS]** Page uses 1 resource hint(s)

---

## Content Quality

### Links (F — 40/100)

*200 links checked, 124 healthy, 76 broken*

- **[CRITICAL]** 124 of 200 links are healthy
- **[WARNING]** Broken link: https://slack.com/intl/en-au — Found in <link href>. Returns HTTP 429.
- **[WARNING]** Broken link: https://slack.com/intl/en-gb — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/en-in — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/fr-ca — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/fr-fr — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/de-de — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/es-es — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/es-la — Found in <link href>. Returns HTTP 429.
- **[WARNING]** Broken link: https://slack.com/intl/ja-jp — Found in <link href>. Returns HTTP 429.
- **[WARNING]** Broken link: https://slack.com/intl/pt-br — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/ko-kr — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/it-it — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/zh-cn — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/intl/zh-tw — Found in <link href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://reveal.clearbit.com/v1/companies/reveal?variable=... — Found in <script src>. Returns HTTP 402.
- **[CRITICAL]** Broken link: https://slack.com/ — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/channels — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/team-chat — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/huddles — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/clips — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/crm — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/crm/small-business — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/templates — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/canvas — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/task-list — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/document-sharing — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/agentic-platform — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/integrations — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/workflow-automation — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/ai — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/slackbot — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/ai-agents — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features/enterprise-search — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/trust/security — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/enterprise-key-management — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/atlas — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: http://slack.com/demo — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/get — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/features — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/manufacturing — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/technology — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/media — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/small-business — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/financial-services — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/retail — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/public-sector — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/distance-learning — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/healthcare — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/templates/gallery — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/solutions/task-management — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/scale — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/engage-users — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/trust — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/enterprise — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/resources — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/whats-new — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/events — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/partners — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/customer-stories — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/community — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/blog — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/resources/why-use-slack/rethinking-emai... — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/help — Found in <a href>. Returns HTTP 404.
- **[CRITICAL]** Broken link: https://slack.com/contact-sales — Found in <a href>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/hero... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/hero... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/hero... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/hero... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/hero... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/dark... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/dark... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/dark... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/dark... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/dark... — Found in <source src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://slack.com/marketing/img/homepage/revamped-25/dark... — Found in <source src>. 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 — 90/100)

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

- **[CRITICAL]** og:image is not reachable — The og:image URL could not be fetched. Social platforms won't be able to display it.

### Structured Data (C — 75/100)

*1 JSON-LD block(s) found — some improvements recommended.*

- **[CRITICAL]** Malformed JSON-LD block #1 — JSON parse error: Mismatch type map[string]interface {} with value array "at index 0: mismatched type with value\n\n\t[{\"@context\":\"http://schema.org\"\n\t^...............................\n"

---

## Infrastructure

### DNS Records (A+ — 100/100)

*15 A records, 23 ms lookup*

- **[PASS]** Resolves to 15 IPv4 address(es)
- **[INFO]** No IPv6 (AAAA) records
- **[PASS]** 4 nameserver(s) configured
- **[PASS]** 5 mail exchanger(s) configured
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[PASS]** SPF record present in TXT
- **[PASS]** DNS resolution time: 23 ms

### Redirect Chain (A+ — 100/100)

*No redirects — direct access*

- **[PASS]** No redirects — direct access

### 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 13 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 13 entries
- **[PASS]** Sitemap index with 13 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: non-www)
- **[PASS]** HTTP correctly 301-redirects to HTTPS

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

*slack.com — via MarkMonitor Inc., 33 years, 11 months old, hosted on AWS*

- **[PASS]** Domain registered until Oct 20, 2027 (1 years, 6 months remaining)
- **[PASS]** DNSSEC is enabled
- **[PASS]** Registrar: MarkMonitor Inc.
- **[PASS]** Hosting: AWS

---

## 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
- **[PASS]** 3 cookie(s) set on initial load (functional)
- **[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

---

## Legal

### Legal Page Ecosystem (A — 85/100)

*4 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at https://slack.com/trust/privacy/privacy-policy, linked from footer.
- **[PASS]** Terms of Service detected — Found at https://slack.com/legal, linked from footer.
- **[PASS]** Cookie Policy detected — Found at https://slack.com/cookie-policy, linked from footer.
- **[PASS]** Accessibility Statement detected — Found at https://slack.com/accessibility.
- **[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 Slack Technologies*

- **[PASS]** Copyright notice is up to date — Copyright notice is up to date: ©2026 Slack Technologies
- **[PASS]** Copyright holder: Slack Technologies

### Regulatory Indicators

*2 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 (strong confidence) — Indicators suggesting GDPR may be relevant: Consent management platform detected: cookielaw.org; Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.
- **[INFO]** ADA indicators detected (moderate confidence) — Indicators suggesting ADA may be relevant: Accessibility statement page found. Americans with Disabilities Act / Section 508 — requires digital accessibility for people with disabilities.

### Third-Party Data Sharing

*3 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]** 3 third-party services across 3 categories — 3 third-party services detected across 3 categories: Analytics (1), Tag Management (1), Advertising (1). Each of these services receives some user data from your site visitors.
- **[INFO]** Google Analytics (Analytics) — Detected via script URL. Typically collects: Page views, User behavior, Demographics, Device info, IP address. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available.
- **[INFO]** Google Tag Manager (Tag Management) — Detected via script URL. Typically collects: Orchestrates other tracking scripts, Page views. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available.
- **[INFO]** LinkedIn Insight (Advertising) — Detected via script URL. Typically collects: Page views, Conversions, Ad targeting, Professional demographics. Privacy policy: https://www.linkedin.com/legal/privacy-policy. Data Processing Agreement available.

### Compliance Badges (B — 70/100)

*1 compliance badge(s) detected*

- **[PASS]** TRUSTe / TrustArc badge detected — Found via body text: 'truste'. Note: the presence of a badge does not verify the certification is current or valid.

---

## 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 (F — 30/100)

*No cache headers*

- **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

---

## Accessibility

### Landmark Structure (A — 90/100)

*27 landmarks*

- **[PASS]** <main> landmark present
- **[PASS]** 6 <nav> landmark(s) found
- **[WARNING]** 3 of 6 <nav> elements are unlabeled — Multiple navigations need aria-label to distinguish them for screen readers.
- **[PASS]** Skip navigation link present

### Heading Hierarchy (A+ — 100/100)

*33 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (A+ — 100/100)

*All 82 images OK*

- **[PASS]** 26 decorative image(s) correctly marked
- **[PASS]** 56 image(s) with good alt text

### Form Accessibility (A+ — 100/100)

*All 7 controls labeled*

- **[PASS]** 7 control(s) properly labeled

### Link & Button Quality (C — 63/100)

*1 issue(s) across 289 links and 41 buttons*

- **[WARNING]** 1 link(s) with generic text — Generic link text like 'click here' doesn't describe the destination.
- **[CRITICAL]** 12 image-only link(s) without alt text
- **[WARNING]** 16 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[PASS]** 260 link(s) with descriptive text

---

## UX

### 404 Error Page (B — 80/100)

*HTTP 404, custom page*

- **[PASS]** Correct 404 status code returned
- **[PASS]** Custom styled 404 page
- **[PASS]** Navigation links present on 404 page
- **[PASS]** Homepage link present on 404 page

### Favicon & Branding (F — 30/100)

*2 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[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 (D — 40/100)

*Not found*

- **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

### Dark Mode Support (D — 40/100)

*No dark mode signals*

- **[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 — 35/100)

*1 navigation pattern(s)*

- **[PASS]** Skip navigation link detected
- **[PASS]** 6 navigation landmark(s) detected
- **[PASS]** Hamburger menu detected (responsive design)

---

## SEO

### Canonical URL (B — 80/100)

*Minor issues*

- **[PASS]** Canonical tag present
- **[PASS]** Canonical is self-referencing
- **[PASS]** Canonical matches final URL after redirects
- **[CRITICAL]** Canonical target returns 404 — Search engines cannot follow this canonical, effectively orphaning this page.

### Meta Tags (A — 85/100)

*Title: 11 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is only 11 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)

*2069 words, Difficult*

- **[PASS]** Page has 2069 words — good depth for search engines
- **[INFO]** Text-to-HTML ratio is 4% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Difficult (grade 12)

### Internal Links (A — 85/100)

*254 internal, 35 external*

- **[PASS]** 254 internal links (88%)
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** Page has 289 links — consider reducing
- **[INFO]** 254 internal / 35 external links
- **[WARNING]** 1 internal links use generic anchor text

### Image SEO (A+ — 100/100)

*82 images, 81 descriptive filenames*

- **[INFO]** 1 image(s) have hash/generic filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (F — 15/100)

*3.67g CO2 per view*

- **[CRITICAL]** 3.67g CO2 per page view — This page transfers 13.0 MB, producing an estimated 3.67g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.68g, network 0.63g, end-user device 2.36g.
- **[INFO]** At 10,000 monthly views: 440.3 kg CO2/year — With 10,000 page views per month, this page would generate approximately 440.3 kg of CO2 annually — equivalent to charging 55034 smartphones.

### Green Hosting (D — 40/100)

*Not green*

- **[INFO]** No confirmed renewable energy commitment detected — Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
- **[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)

*99% cached*

- **[PASS]** 99% reduction on repeat visits — Returning visitors download only 84 KB (vs 13266 KB first visit). 211 of 218 resources are served from browser cache, saving 3.65g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.02g CO2 (first visit: 3.67g)

### Carbon Budget (F — 15/100)

*95th percentile*

- **[WARNING]** 3.67g CO2 — above the median website (0.60g) — Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 95th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

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

*96% efficient*

- **[PASS]** Transfer efficiency: 96% — Only 566 KB of potential savings identified. Your page is well-optimized for size.

---

---

*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/9b53f2bf-56c0-456d-a77d-06f0458f7366*