Yes, both Airstack and Paper Workspace offer a Free Trial.
Airstack is designed for Large Enterprises, Medium Business and Small Business.
Paper Workspace is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Airstack Starts at $24/User/Year whereas for Paper Workspace Starts at $4/User/Month when Billed Yearly.
Some top alternatives to Airstack includes CollaborateCloud, DoSheets, SalesCRM, SaaSLicense, CostTeam, Qualified, Workvivo, Follab, Moderne, Paper Workspace, TealBox and IFTTT.
Some top alternatives to Paper Workspace includes Anywhere, Today, CollaborateCloud, SalesCRM, CloudSocial, Qualified, Checkeden, Workvivo, Blog To Social, Moderne, BetterCloud and IFTTT.