tabExtend offers Free Trial, but KnowledgeOS does not.
tabExtend is designed for Individuals, Medium Business and Small Business.
KnowledgeOS is designed for Large Enterprises, Medium Business and Small Business.
The starting price of tabExtend begins at $4/Month when Billed Yearly, while pricing details for KnowledgeOS are unavailable.
Some top alternatives to tabExtend includes Qlearly, Flowbar, Qualified, Workvivo, Tab Management, QuickTab, KnowledgeOS, Setapp, Clarity, TabsFolders and Workona.
Some top alternatives to KnowledgeOS includes Boost, Flowbar, Qualified, Workvivo, QuickTab, tabExtend, SmartWindows, Fructify, Shift, Desktop.com, WorkDesk and IFTTT.