Yes, both Slack and Leapsome offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Leapsome is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Leapsome Starts at $6/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 Leapsome includes Lattice, 15Five, Small Improvements, Performance Culture, Chairlift, PerformanceHub, culture.easy, 10xPerformance, Culture Amp and Performly.