AlphaReign is described as 'torrent search engine that searches other sites for the best torrents and then delivers them to you. The reason why AlphaReign is better than other engines is because it takes a long list from each site, and sorts them in order of best availability' and is a torrent search engine in the file sharing category. There are more than 10 alternatives to AlphaReign, not only websites but also apps for Windows and Tor. The best AlphaReign alternative is The Pirate Bay, which is free. Other great sites and apps similar to AlphaReign are 1337X, LimeTorrents, Torrends.to and Zooqle.
AlphaReign alternatives are mainly Torrent Search Engines but may also be Torrent Trackers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of AlphaReign.