substack.com
Last scanned Jun 22, 2026
substack.com received 48 out of 100 in a WCAG 2.2 accessibility audit performed on June 22, 2026, with several areas requiring attention. The audit uncovered 15 distinct accessibility violations totalling 1459 instances, including 56 critical, 1371 serious, 32 moderate issues. The most pressing issues include insufficient colour contrast (WCAG 1.4.3), 911 instances; SVG images missing alternative text (WCAG 1.1.1), 405 instances; and heading levels skipped (WCAG 1.3.1), 32 instances. The assessment covered 10 pages across 159 unique page templates. No consent management platform was detected. With 11 third-party requests from 5 vendors, the site may not meet GDPR and ePrivacy consent requirements.
WCAG A
substack.com
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+ 498 more issues (on 10 pages)
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Claim & unlock all · 358 pages+ 498 more issues (on 10 pages)
AI fix suggestions, all pages & full details
Claim & unlock all · 358 pagesScan Coverage
Score is based on 10 structurally unique pages representing 358 discovered URLs.
Key Accessibility Issues
1459 violations found across 15 rules — 56 critical, 1371 serious, 32 moderate, 0 minor
Ensures the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds
WCAG 1.4.3 · 911 instances found · How to fix →
Ensures <svg> elements with an img, graphics-document or graphics-symbol role have an accessible text
WCAG 1.1.1 · 405 instances found · How to fix →
Page has no <h1> heading — every page should have exactly one
WCAG 1.3.1 · 32 instances found · How to fix →
Ensures buttons have discernible text
WCAG 4.1.2 · 22 instances found
Ensures every ARIA button, link and menuitem has an accessible name (mobile 320px)
WCAG 4.1.2 · 21 instances found
Ensure touch target have sufficient size and space
WCAG 2.5.8 · 14 instances found
Ensures all ARIA attributes have valid values
WCAG 4.1.2 · 13 instances found · How to fix →
Ensures links have discernible text (mobile 320px)
WCAG 2.4.4, 4.1.2 · 11 instances found · How to fix →
Ensures <meta name="viewport"> does not disable text scaling and zooming
WCAG 1.4.4 · 10 instances found
Ensures an element's role supports its ARIA attributes
WCAG 4.1.2 · 7 instances found · How to fix →
Cookie Consent & Compliance
substack.com does not appear to use a consent management platform. With 11 third-party requests from 5 vendors and 11 cookies detected, the site may not be compliant with GDPR Article 6 and ePrivacy Directive Article 5(3) requirements for prior consent. Learn about cookie consent requirements.
Get free cookie consent for substack.com — including IAB TCF v2.3 and Google Consent Mode v2.
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Third-Party Trackers
11 requests detected from 5 vendors — FunctionalSoftware, Amazon, Mux, Google LLC, Sentry (Functional Software)
Third-Party Trackers
11 requests detected from 5 vendors — FunctionalSoftware, Amazon, Mux, Google LLC, Sentry (Functional Software)
Analytics
6
Marketing
0
Necessary
3
Functional
0
Other
0
| Vendor | Category | Type | Domain |
|---|---|---|---|
| FunctionalSoftware | Analytics | script | o350427.ingest.sentry.io |
| Amazon | Essential | script | substack-video.s3.amazonaws.com |
| Mux | Essential | script | stream.mux.com |
| Google LLC | Necessary | script | fonts.gstatic.com |
| Sentry (Functional Software) | Necessary | script | js.sentry-cdn.com |
Cookies
11 cookies detected — 2 necessary, 1 analytics, 0 marketing
Cookies
11 cookies detected — 2 necessary, 1 analytics, 0 marketing
Total
11
Necessary
2
Functional
0
Analytics
1
Marketing
0
Unknown
8
| Name | Domain | Category | Provider | Expiry | Secure | HttpOnly | Party |
|---|---|---|---|---|---|---|---|
| ajs_anonymous_id | substack.com | Analytics | Segment | 363 d | — | — | 1st |
| cf_clearance | .substack.com | Necessary | Cloudflare | 363 d | ✓ | ✓ | 1st |
| __cf_bm | .substack.com | Necessary | Cloudflare | Expired | ✓ | ✓ | 1st |
| ab_experiment_sampled | .substack.com | Unknown | — | 363 d | ✓ | ✓ | 1st |
| ab_testing_id | .substack.com | Unknown | — | 363 d | ✓ | ✓ | 1st |
| AWSALBTG | substack.com | Unknown | — | 5 d | — | — | 1st |
| AWSALBTGCORS | substack.com | Unknown | — | 5 d | ✓ | — | 1st |
| cookie_storage_key | .substack.com | Unknown | — | 88 d | ✓ | — | 1st |
| disable_experiments | substack.com | Unknown | — | Session | — | — | 1st |
| disable_html_pixels | substack.com | Unknown | — | Session | — | — | 1st |
| substack.lli | .substack.com | Unknown | — | 88 d | ✓ | — | 1st |
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