What is the _lfa cookie?
Leadfeeder cookie collects the behavioral data of all website visitors. This includes; pages viewed, visitor source and time spent on the site.
Our October 2026 scan found it on 9 sites (0% of the 2,450 we scanned), set before any consent.
- Purpose
- Advertising
- Belongs to
- Leadfeeder
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- 12 months (vendor says: 2 years) — shorter than the vendor documents
Sites that set _lfa before consent
The highest-ranked 9 of 9 sites.
- classlink.com3 tracking companies
- mindbox.ru6 tracking companies
- nexx360.io0 tracking companies
- mountain.com11 tracking companies
- jampp.com4 tracking companies
- zeotap.com22 tracking companies
- gitbook.io7 tracking companies
- pushwoosh.com5 tracking companies
- searchenginejournal.com8 tracking companies
How to stop it
Declining non-essential cookies in a site's consent banner should stop _lfa 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.