What is the intercom-device-id-* cookie?
Identifier for each unique device that interacts with the Messenger. It is refreshed on each successful ping, extending it another 9 months. We use this cookie to determine the unique devices interacting with the Intercom Messenger to prevent abuse.
Our October 2026 scan found it on 7 sites (0% of the 2,450 we scanned), set before any consent.
- Purpose
- Analytics
- Belongs to
- Intercom
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- 9 months (vendor says: 9 months) — about what the vendor documents
- Name
- A family of cookies: the part after intercom-device-id- varies by site or account.
Sites that set intercom-device-id-* before consent
The highest-ranked 7 of 7 sites.
- elegantthemes.com3 tracking companies
- inmotionhosting.com4 tracking companies
- ssl.com9 tracking companies
- mysterium.network0 tracking companies
- dmca.com2 tracking companies
- funinexch.com1 tracking company
- ecwid.com1 tracking company
Related cookies
Other cookies from Intercom.
- intercom-id-*7 sites
- intercom-session-*7 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop intercom-device-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.