Yes, both Slack and Salesforce offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Salesforce is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Salesforce Starts at $25/User/Month.
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 Salesforce includes Pipedrive, HubSpot CRM, ClickUp, Freshsales, Salesflare, Close, Vendasta, Keap, Hubspot Marketing Hub, Dynamics 365 Marketing, Zoho CRM, Microsoft Dynamics 365 for Sales, Thryv, Netsuite CRM, Wisdom CRM, SalesCRM, SimpleCRM and Zoho CRM Plus.