Yes, both Slack and BrightReps offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
BrightReps is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for BrightReps Starts at $29/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 BrightReps includes Process Street, Projectworks, Board, IBM Blueworks Live, ProcessPlan, Bautomate, Bizagi, Withprocess.com, Tibco BPM Enterprise and BPMapp by 500apps.