Paperpile offers Free Trial, but nXr does not.
Paperpile is designed for Individuals, Medium Business and Small Business.
nXr is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Paperpile Starts at $2.99/Month whereas for nXr Starts at $3/Month.
Some top alternatives to Paperpile includes Qualified, Workvivo, The Papers, nXr, JabRef, Citavi, Zotero, Sciwheel, EndNote, ReadCube Papers, RefWorks and Paper Workspace.
Some top alternatives to nXr includes ScholarOne, Qualified, Workvivo, Referenceable, Trove, JabRef, Citavi, Zotero, Paperpile, EndNote, RefWorks and Nextjournal.