Trello offers Free Trial, but Slash does not.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Slash is designed for Individuals, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Slash Starts at $5/Month when Billed Yearly.
Some top alternatives to Trello includes Quickbase , Smartsheet, ClickUp, Visor, 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 Slash includes Todoist, Wrike, Smartsheet, nTask, Microsoft To Do, TickTick, Today, ClickUp, WeekToDo, SimplyDone, TasksBoard, Toodledo and Taskable.