Yes, both Quickbooks and Slenke offer a Free Trial.
Quickbooks is designed for Individuals, Freelancers, Medium Business and Small Business.
Slenke is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Slenke begins at $15/User/Month when Billed Yearly, while pricing details for Quickbooks are unavailable.
Some top alternatives to Quickbooks includes Xero, Freshbooks, Sage Accounting (Sage One), Zoho Books, easybook.io, QuickFile, AccountingSuite, Sage Business Cloud Accounting, Wave and Sage 50cloud Accounting.
Some top alternatives to Slenke includes Smartsheet, Miro, Process Street, Wrike, Notion, TeamGantt, monday.com, Teamwork, ProjectManager.com, Microsoft Project, ProWorkflow, Projectworks, Trackboard, Quick Base, ClickUp and Project Insight.