Yes, both Slack and Leadformly offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Leadformly is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Leadformly Starts at $179/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 Leadformly includes CapSumo, Leadfeeder, Lead Forensics, Leadforms, Form2chat, LeadGen App, Typeform, Serviceform, Leadinfo and PrettyLead.