What does substack.com track?
substack.com loaded no advertising or analytics trackers before consent.
Scanned October 2, 2026 from Germany, loading substack.com once and clicking nothing. How we scan
- Tracking companies
- 0
- Tracking cookies
- 0
- Third-party hosts
- 4
- Cookies in total
- 7
Consent banner
No known consent management platform was detected on the page.
Companies contacted before consent
2 of the 4 companies it contacted before consent were functional companies.
None.
Other third parties (content delivery, consent, functional, unclassified)
- substackcdn.com166 requestsUnclassified
substackcdn.com
- Google2 requestsFunctional
fonts.gstatic.com
- Sentry1 requestFunctional
o350427.ingest.sentry.io
- Amazon Web Services3 requestsContent delivery
substack-video.s3.amazonaws.com
Cookies set before consent
| Cookie | Purpose | Set by | Lasts |
|---|---|---|---|
| cookie_storage_key | Unclassified | substack.com | 3 months |
| disable_experiments | Unclassified | substack.com | Session |
| substack.lli | Unclassified | substack.com | 3 months |
| __cf_bm | Functional | substack.com | Under a day |
| AWSALBTG | Functional | substack.com | 7 days |
| AWSALBTGCORS | Functional | substack.com | 7 days |
| cf_clearance | Functional | substack.com | 12 months |
The page also wrote 3 keys to local storage, which works like a cookie but isn't sent with requests.
Understanding this page
- How to see which cookies and trackers a website loads
A hands-on walkthrough for checking what a site sets before you've clicked anything, using Chrome and Firefox's built-in tools, plus how CookieTosser automates the same check every month.
- What counts as valid cookie consent in the EU
The rules that actually govern cookie banners — the ePrivacy Directive, the GDPR consent standard, the Planet49 ruling, the strictly-necessary exemption, and what "reject" has to offer compared with "accept.
- Consent management platforms explained
What a CMP banner is actually doing behind the scenes, how the IAB's TCF standard and Google's Consent Mode v2 fit in, and why a banner being present is no guarantee that nothing loads before you answer it.