Yes, both Slack and Copper (ProsperWorks CRM) offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Copper (ProsperWorks CRM) is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Copper (ProsperWorks CRM) Starts at $23/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 Copper (ProsperWorks CRM) includes Thryv, Salesforce Sales Cloud, monday sales CRM by monday.com, Pipedrive, Zoho CRM, Vendasta, ClickUp, Salesforce, The Real Estate CRM, Workbooks CRM, GoCRM, RealtimeCRM, SalesCRM, SimpleCRM, CRM.me, Cool Life CRM and CRM.io by 500apps.