Yes, both Slack and Shortcut offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Shortcut is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Shortcut Starts at $8.50/User/Month when Billed Yearly.
Some top alternatives to Slack includes Microsoft Teams, Glip, Google Chat, ChatWork, Dialog, Office Chat, imBee, Takle, SPACE Channel and Teamwork Chat.
Some top alternatives to Shortcut includes Smartsheet, Miro, Process Street, Wrike, Notion, Jira, Next Please, Teamwork, ProjectManager.com, ProWorkflow, Kanbanize, Quick Base, ClickUp, Projectsly by 500apps, Height, Yodiz and Flow.