Yes, both PlanGrid and Knowify offer a Free Trial.
PlanGrid is designed for Large Enterprises, Medium Business and Small Business.
Knowify is designed for Large Enterprises, Medium Business and Small Business.
Pricing for PlanGrid Starts at $39/Month when Billed Yearly whereas for Knowify Starts at $149/Month when Billed Yearly.
Some top alternatives to PlanGrid includes Procore, UDA ConstructionOnline, CMiC, Autodesk BIM 360, Buildertrend, Knowify, Oracle Aconex, Contractor Foreman, Houzz Pro and FOUNDATION.
Some top alternatives to Knowify includes Procore, UDA ConstructionOnline, Contractor's Office, Contractor's Cloud, Buildertrend, Corecon, CoConstruct, iCore and Remato.