Yes, both Flock and Slack offer a Free Trial.
Flock is designed for Large Enterprises, Medium Business and Small Business.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Slack begins at $2.67/Month, while pricing details for Flock are unavailable.
Some top alternatives to Flock includes CollaborateCloud, Zoho Connect, Zoho Cliq, ClickUp, Workplace, Zimbra Collaboration, mi.team, Fleekdrive, Chatter, Collabtools and Ideagen Huddle.
Some top alternatives to Slack includes Microsoft Teams, Glip, Google Chat, ChatWork, Dialog, Office Chat, imBee, Takle, SPACE Channel and Teamwork Chat.
