Defunct Tor hidden services

KickassTorrents (commonly abbreviated KAT) was a website that provided a directory for torrent files and magnet links to facilitate peer-to-peer file sharing using the BitTorrent protocol. It was founded in 2008 and by November 2014, KAT became the most visited BitTorrent directory in the world, overtaking The Pirate Bay, according to the site's Alexa ranking. KAT went offline on 20 July 2016 when the domain was seized by the U.S. government. The site's proxy servers were shut down by its staff at the same time.

defunct website that used hidden services through the Tor network

Kidflix was a dark web site that hosted child pornography from 2021 to 2025. Before it was closed Kidflix was one of the largest pedophile platforms in the world, with approximately 1.8 million users worldwide logged on Kidflix between April 2022 and March 2025. Over its lifetime the site held more than 91,000 videos, averaging 3.5 uploaded every hour.

darknet market

SIGAINT was a Tor hidden service offering secure email services. According to its FAQ page, its web interface used SquirrelMail which does not rely on JavaScript. Passwords couldn't be recovered. Users received two addresses per inbox: one at sigaint.org for receiving clearnet emails and the other at its .onion address only for receiving emails sent from other Tor-enabled email services. Free accounts had 50 MB of storage space and expired after one year of inactivity. Upgraded accounts had access to POP3, IMAP, SMTP, larger size limits, full disk encryption, and never expired.

child pornography website later operated by Australian police as a sting operation