immunet

Immunet is a cloud-based antivirus product that was originally developed by the company Immunet. It offered real-time protection by combining a lightweight local client with a cloud-based reputation system, allowing rapid identification of new and emerging threats while minimizing local resource use. The product was available in free and paid editions.

The Immunet client ran on Windows and could be used alongside other antivirus software. A key feature was the cloud-based, community-driven protection network, which aggregated feedback from participating users to improve detection rates and speed up response to new malware.

History and lineage: Immunet’s technology and brand were acquired by Sourcefire in 2010. Sourcefire was later acquired by Cisco Systems in 2013, and Immunet’s development and branding were subsequently integrated into Cisco’s broader security portfolio. In the years that followed, the Immunet Protect product line saw limited updates as development focus shifted to other Cisco security offerings.

Overview and status: Immunet is cited in historical discussions of cloud-based antivirus approaches that leverage a community reputation model to augment traditional signature-based detection. While the brand is not widely marketed as an independent product today, its approach influenced subsequent developments in cloud-assisted endpoint security.