Yes, both Slack and Pipedrive offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pipedrive is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Pipedrive Starts at $9.90/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 Pipedrive includes HubSpot CRM, ClickUp, Freshsales, Salesflare, Close, Vendasta, Keap, Salesforce, Onpipeline, Pipeliner CRM, SalesCRM, Salesdash CRM, Pipeline CRM, CRM.io by 500apps and Pype Intelligent CRM.