What is the ajs_anonymous_id cookie?
Used for Analytics and help count how many people visit a certain site by tracking if you have visited before.
Our October 2026 scan found it on 38 sites (2% of the 2,450 we scanned), set before any consent.
- Purpose
- Analytics
- Belongs to
- Trustpilot
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- 12 months (vendor says: 1 year) — about what the vendor documents
Sites that set ajs_anonymous_id before consent
The highest-ranked 30 of 38 sites.
- dell.com12 tracking companies
- digitalocean.com3 tracking companies
- atlassian.com0 tracking companies
- rakuten.com3 tracking companies
- figma.com0 tracking companies
- fidelity.com15 tracking companies
- costco.com3 tracking companies
- typeform.com2 tracking companies
- alphonso.tv6 tracking companies
- twilio.com9 tracking companies
Show 20 more sites
- immobiliare.it6 tracking companies
- adroll.com11 tracking companies
- trello.com0 tracking companies
- logitech.com1 tracking company
- matterport.com3 tracking companies
- bitbucket.org0 tracking companies
- eskimi.com8 tracking companies
- yotpo.com4 tracking companies
- verizon.com20 tracking companies
- customer.io2 tracking companies
- miro.com2 tracking companies
- adp.com6 tracking companies
- crunchyroll.com4 tracking companies
- polymarket.com3 tracking companies
- axios.com5 tracking companies
- clickup.com3 tracking companies
- suno.com9 tracking companies
- moz.com11 tracking companies
- joyn.de1 tracking company
- loom.com0 tracking companies
How to stop it
Declining non-essential cookies in a site's consent banner should stop ajs_anonymous_id 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.