NSDL
Yes, both DarkSight and TAC Security offer a Free Trial.
DarkSight is designed for Large Enterprises, Medium Business and Small Business.
TAC Security is designed for Large Enterprises, Medium Business and Small Business.
Pricing details for both DarkSight and TAC Security are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to DarkSight includes Flexera Software Vulnerability Management, ManageEngine Vulnerability Manager Plus, Ivanti Patch for SCCM, ManageEngine Patch Connect Plus, Patch My PC, SolarWinds Patch Manager, ManageEngine Patch Manager Plus, Qualys Patch Management, JetPatch and Symantec Endpoint Management.
Some top alternatives to TAC Security includes Tenable.io, InsightVM, BeyondTrust Vulnerability Management, Qualys VM, Nessus, Microsoft Threat Vulnerability Management, Flexera Software Vulnerability Management, ManageEngine Vulnerability Manager Plus, Kenna Security and Snyk.