Yes, both Slack and Socialtribes offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Socialtribes is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Socialtribes Starts at $9/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 Socialtribes includes SalesUp! CRM, SalesInvite, TrueSaaS, Serviceform, B2B Salesfuel, eSales Hub, LeadSift, Dynamic Leads, Qualified, Workvivo, IFTTT and Kollect.