Trello offers Free Trial, but Waitwhile does not.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Waitwhile is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Waitwhile Starts at $49/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 Waitwhile includes Social Q&A, BookingNinja, Qualified, Waitwize, Workvivo, Waiting list, Schedule Agent, Qwaiting, TablesReady, IFTTT and Waitlist Me.