Notion, Trello, BookStack, GitBook, Anytype, DokuWiki, Nuclino, MediaWiki, Wiki.js, AppFlowy, Obie, Kipwise, You Need A Wiki, Docsie, BlueSpice for MediaWiki, VivifyScrum, Banana Dance Wiki/CMS, XWiki, Ardoq, Plone, Document360, Tettra, ProProfs Knowledge Base, Archbee, Dokit, Foswiki, Slite, ScrewTurn Wiki, Documize, Instiki, Saga.so, Curvenote, IT Glue, UserPress, Qortex, Fulcrum Wiki, Gwapit, Doxter, Zoho Wiki, Incentive, ikiwiki, AllAnswered, HelpDocs, OneBar, Ayanza, LionWiki, simplewiki, Balsa Knowledgebase, MindTouch, SimpleDocServer, Referata, Taagly, Wikidocs, Brightable, Papirux, Sticktail, Hivemind, Matterial, Skore.io, SABIO, BoltWire, Lessons Learned Server, Acknow, Bookplay, EditMe, Crowdbase, Kanvasroom, Papyrs, Woost, SAP StreamWork, Socialtext are some alternatives to Confluence.