Yes, both Slack and Leadberry offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Leadberry is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Leadberry Starts at $24/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 Leadberry includes Leadfeeder, LeadFuze, Lead Forensics, LeadsBridge, Fresh Lead Finder, Leadinfo, B2B Salesfuel, Leadenhancer, Dynamic Leads and Lead Revealer.