Yes, both Sleekplan and Jira offer a Free Trial.
Sleekplan is designed for Large Enterprises, Medium Business and Small Business.
Jira is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Sleekplan Starts at $15/Month when Billed Yearly whereas for Jira Starts at $6.25/User/Month when Billed Yearly.
Some top alternatives to Sleekplan includes Jira, ProdCamp, FeedPiper, Backlogs, Appzi, Kritikos, Userback and Canny.
Some top alternatives to Jira includes Trello, Confluence, Asana, SwiftKanban, Kanbanize, ClickUp, Height, Kanban Tool, Kanban Zone and KanbanFlow.