Yes, both Slack and Threatwatch offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Threatwatch is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Slack begins at $2.67/Month, while pricing details for Threatwatch are unavailable.
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 Threatwatch includes Tenable.io, BeyondTrust Vulnerability Management, Qualys VM, Nessus, Microsoft Threat Vulnerability Management, Flexera Software Vulnerability Management, ManageEngine Vulnerability Manager Plus, Detectify, ThreatSpy and Tripwire IP360.