Yes, both Slack and Wix Answers offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Wix Answers is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Wix Answers Starts at $24/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 Wix Answers includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, LiveAgent, Support Hub, HelpDesk, SysAid, Jitbit Helpdesk, Desky, ReadyDesk, Sitehelpdesk, Trakdesk, AzureDesk and HESK.