Trello offers Free Trial, but Spool does not.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Spool is designed for Medium Business and Small Business.
The starting price of Trello begins at $5/User/Month when Billed Yearly, while pricing details for Spool 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 Spool includes Weemss, Fireflies.ai, NordPass, Fathom, Marchex, Chorus, Avoma, ExecVision, Gong and Murf Voiceover Studio.