Yes, both Slack and ProdPad offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ProdPad is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for ProdPad Starts at $1,199 when Billed Monthly.
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 ProdPad includes ProductPlan, Jira, productboard, Productroad, Backlogs, Next Please, ProdEasy, StoriesOnBoard, Height and IdeaPlan.