Blockthrough

Advertising

Blockthrough loaded on 35 sites in our October 2026 scan: 1% of the 2,450 most-visited sites we checked, before any visitor had given consent.

Category: Advertising. A company can do several jobs; this is its main role on the pages we saw.

On 94% of the sites where it loaded, a consent banner was already present but hadn't been answered yet. It's especially common on .jp sites: 10% of them load it, versus 1% of all sites we scanned.

About Blockthrough

Blockthrough works with publishers to get their ads displayed to visitors using an ad blocker, by having those ads meet the criteria ad-blocking lists treat as acceptable.

Its btloader.com script detects whether an ad blocker is active and, if so, requests a version of the site's ads formatted to pass through it.

Often loaded alongside

Sites that load Blockthrough most often also load ad-delivery.net (100%), dns-finder.com (100%), Google Ads (100%), Google Analytics (94%), and Google (83%).

Domains it loads from

btloader.com
cdn.btloader.com
cdn.api.btloader.com
api.btloader.com

Sites that load Blockthrough

The highest-ranked 30 of 35 sites.

msn.com4 tracking companies
theverge.com10 tracking companies
olx.pl5 tracking companies
lanacion.com.ar14 tracking companies
gamewith.jp6 tracking companies
trilltrill.jp23 tracking companies
skelbiu.lt5 tracking companies
gamebanana.com6 tracking companies
sciencedaily.com3 tracking companies
vlr.gg12 tracking companies

Show 20 more sites

engadget.com5 tracking companies
vox.com10 tracking companies
hatena.ne.jp19 tracking companies
sueddeutsche.de5 tracking companies
mapquest.com10 tracking companies
myanimelist.net20 tracking companies
infojobs.net8 tracking companies
dictionary.com35 tracking companies
thedailybeast.com18 tracking companies
ynet.co.il23 tracking companies
nymag.com10 tracking companies
olx.ua9 tracking companies
wikidot.com8 tracking companies
stuff.co.nz19 tracking companies
jpost.com15 tracking companies
thestar.com17 tracking companies
searchenginejournal.com8 tracking companies
nine.com.au11 tracking companies
foreignpolicy.com22 tracking companies
xda-developers.com5 tracking companies

Understanding this page

What the tracker categories mean
What "advertising," "analytics," "social," "consent" and the rest actually mean for a company or a cookie, and how CookieTosser decides which one applies.
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.