Yes, both Slack and Loomly offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Loomly is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Loomly Starts at $26/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 Loomly includes Crowdfire, SocialBee, Zoho Social, Hootsuite, Sprout Social, Planable, AgoraPulse, SocialMgr, Later, SocialPilot, Socialdraft, Broadcast, CloudSocial, SocialHub and SendPilot.