Yes, both Thinkspace and ReadCube Papers offer a Free Trial.
Thinkspace is designed for Large Enterprises, Medium Business and Small Business.
ReadCube Papers is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Thinkspace Starts at $10/User/Month when Billed Yearly whereas for ReadCube Papers Starts at $3/Month.
Some top alternatives to Thinkspace includes CollaborateCloud, Zoho Connect, Airtable, ClickUp, mi.team, Google Workspace, Board, CoLab, Collabtools, Sparkin and Wide Ideas.
Some top alternatives to ReadCube Papers includes Nimbus Note, Qualified, Workvivo, The Papers, Citavi, Zotero, Paperpile, Sciwheel, EndNote, RefWorks and Weava.