What is the AMP_MKTG_* cookie?
Registers statistical data on users' behaviour on the website. Used for internal analytics by the website operator.
Our October 2026 scan found it on 15 sites (1% of the 2,450 we scanned), set before any consent.
- Purpose
- Analytics
- Belongs to
- Amplitude
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- 12 months (vendor says: 1 year) — about what the vendor documents
- Name
- A family of cookies: the part after AMP_MKTG_ varies by site or account.
Sites that set AMP_MKTG_* before consent
The highest-ranked 15 of 15 sites.
- amplitude.com5 tracking companies
- avast.com5 tracking companies
- digitalocean.com3 tracking companies
- wpguardian.com4 tracking companies
- elconfidencial.com6 tracking companies
- hostinger.com4 tracking companies
- avira.com5 tracking companies
- slate.com20 tracking companies
- thehindu.com7 tracking companies
- gitbook.io7 tracking companies
Show 5 more sites
- avg.com6 tracking companies
- alltrails.com5 tracking companies
- myfitnesspal.com1 tracking company
- statsig.com3 tracking companies
- midjourney.com0 tracking companies
Related cookies
Other cookies from Amplitude.
- AMP_*25 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop AMP_MKTG_* being set on later visits. Blocking third-party cookies in your browser settings stops the third-party kind everywhere, and clearing cookies for a site removes any it already set.
Description from the Open Cookie Database (Apache 2.0).
Understanding this page
- How cookie lifetimes work, and why a 13-month _ga matters
What a cookie's "expires" field actually controls, why Google Analytics ships a 2-year default that many sites cut down to 13 months, and how Safari's 7-day cap on script-set cookies changes the picture.
- First-party vs third-party cookies (and why "first-party" still tracks you)
What the distinction actually means technically, why browsers only block one of the two, and how CNAME cloaking, server-side tagging and cookies like _ga let sites keep tracking under their own domain.
- How to block or limit trackers
Browser privacy settings, content blockers, Global Privacy Control and clearing cookies compared honestly — what each one actually stops, what it doesn't, and what it costs you in return.