Yes, both Slack and HelpCrunch offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
HelpCrunch is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for HelpCrunch Starts at $12/User/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 HelpCrunch includes ZoomInfo Chat, ClickDesk, LiveAgent, LiveChat, DeskMoz, Zendesk Chat, Intercom, LiveHelpNow, Comm100 Live Chat, HelpOnClick and Smartchat.