Mimecast

Mimecast is a commercial security company focused on protecting email and collaboration tools such as chat and file sharing. It pairs threat filtering with archiving and awareness training, and frames the whole offering as human risk management, meaning it tries to reduce the chance that employees cause or fall victim to an incident.

The product line includes advanced email security, collaboration threat protection, DMARC Analyzer for protecting brand and domain reputation, and Managed Threat Response, where analysts review every email that users report. Incydr covers insider threats and data protection, the Aware suite supports governance and compliance, and Engage delivers security awareness training based on human risk signals. An email archive keeps messages retrievable.

Mimecast is proprietary and delivered as a cloud service for businesses, sold through quotes rather than listed prices. It has also begun promoting tools to discover and govern AI agents running inside a company, aimed at preventing data exposure from unmanaged automation.