Yes, both Trello and Experiments by GrowthHackers offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Experiments by GrowthHackers is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Trello begins at $5/User/Month when Billed Yearly, while pricing details for Experiments by GrowthHackers are unavailable.
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 Experiments by GrowthHackers includes Jira, ProdCamp, Browsee, Critogo, Convertize, CROmetrics, CROOW, IdeaPlan and SprintMapp.