What is the SessionId cookie?
This is a performance cookie used to collect data about people logging in and out of the website.
Our October 2026 scan found it on 23 sites (1% of the 2,450 we scanned), set before any consent.
- Purpose
- Unclassified
- Belongs to
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- 1 day (vendor says: 1 year) — shorter than the vendor documents
Sites that set SessionId before consent
The highest-ranked 23 of 23 sites.
- namecheap.com4 tracking companies
- steampowered.com0 tracking companies
- hostgator.com3 tracking companies
- steamcommunity.com1 tracking company
- digitalocean.com3 tracking companies
- allaboutcookies.org7 tracking companies
- kwai.com2 tracking companies
- zhihu.com1 tracking company
- beboo.ru3 tracking companies
- battle.net1 tracking company
Show 13 more sites
- pusher.com3 tracking companies
- disdarrummers.shop1 tracking company
- last.fm8 tracking companies
- tutu.ru5 tracking companies
- idealo.de0 tracking companies
- domain.com6 tracking companies
- razorpay.com6 tracking companies
- webnovel.com4 tracking companies
- dyz9.top1 tracking company
- feinidi.com1 tracking company
- kobo.com1 tracking company
- ufanet.ru2 tracking companies
- casasbahia.com.br8 tracking companies
Related cookies
Other cookies from Instagram.
- mid8 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop SessionId 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.