Yes, both Trello and Formstack offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Formstack is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Formstack Starts at $50/Month when Billed Yearly.
Some top alternatives to Trello includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Freshbooks, Jira, Basecamp, Wrike, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard, Quick Base, Todoist, Resource Guru and Height.
Some top alternatives to Formstack includes Cognito Forms, Zoho Forms, Formsite, Typeform, Google Forms, Jotform, 123FormBuilder, FormAssembly, stepFORM, forms.app, Microsoft Forms and Framestr Online Forms.