Yes, both Trello and PlanGrid offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
PlanGrid is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for PlanGrid Starts at $39/Month when Billed Yearly.
Some top alternatives to Trello includes Smartsheet, Miro, Process Street, Wrike, Notion, Freshbooks, Jira, Basecamp, Zoho Projects, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard, Quick Base, Todoist, ClickUp, Resource Guru and Height.
Some top alternatives to PlanGrid includes Procore, UDA ConstructionOnline, CMiC, Autodesk BIM 360, Buildertrend, Knowify, Oracle Aconex, Contractor Foreman, Houzz Pro and FOUNDATION.