Yes, both Sciwheel and Paperpile offer a Free Trial.
Sciwheel is designed for Individuals, Medium Business and Small Business.
Paperpile is designed for Individuals, Medium Business and Small Business.
Pricing for Sciwheel Starts at $9.95/Month whereas for Paperpile Starts at $2.99/Month.
Some top alternatives to Sciwheel includes ScholarOne, Qualified, Workvivo, nXr, JabRef, Citavi, Zotero, Paperpile, EndNote, ReadCube Papers, RefWorks and SciSpace (formerly Typeset).
Some top alternatives to Paperpile includes Qualified, Workvivo, The Papers, nXr, JabRef, Citavi, Zotero, Sciwheel, EndNote, ReadCube Papers, RefWorks and Paper Workspace.