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Forescout Technologies is a cybersecurity company headquartered in San Jose, California, focused on device visibility and network access control. The company was taken private in 2020 by Advent International in an acquisition deal valued at approximately $1.9 billion, having previously been listed on NASDAQ under the ticker FSCT. Forescout's core capability is discovering and classifying every device connected to an enterprise network — including IT, OT, IoT, and medical devices (IoMT) — without requiring agents installed on the endpoints.

Forescout's primary product platform is the Forescout Platform (previously marketed under the name CounterACT), which provides continuous, agentless visibility across heterogeneous device environments. The central problem it addresses is that enterprise networks now contain large numbers of unmanaged or unmanageable devices — industrial controllers, building automation systems, connected medical equipment, smart cameras — that traditional endpoint security tools cannot reach because they cannot run software agents. Forescout identifies these devices, classifies them, assesses their compliance posture, and can automate policy enforcement or network segmentation responses. The primary buyers are enterprise security teams and network operations teams in sectors with heavy OT and IoT exposure: manufacturing, healthcare, energy and utilities, and government. The product is sold through an enterprise sales model, often with channel partners and system integrators.

Forescout's platform is organized around several named modules. eyeSight provides the foundational agentless device discovery and classification. eyeControl handles automated policy enforcement and network access control. eyeSegment maps and enforces network segmentation policies. eyeInspect (previously SilentDefense, acquired from Medigate/formerly from Security Matters) is focused on OT/ICS network visibility and threat detection within operational technology environments. eyeExtend is the integration framework that connects Forescout's data with third-party tools such as SIEM platforms, ITSM systems, and other security controls. Forescout acquired Cysiv in 2021 to add SOC-as-a-service and threat detection capabilities, and it acquired Medigate in 2023 to deepen its healthcare IoT (IoMT) security coverage.

Forescout competes directly with Claroty, Armis, and Nozomi Networks in the OT/IoT device security space, and with Cisco Identity Services Engine (ISE) in the broader network access control (NAC) category. Armis and Claroty have both raised large funding rounds and expanded aggressively into the same agentless device visibility market, making this segment increasingly competitive. Forescout's long NAC heritage and its established presence in government and regulated industries represent its clearest differentiation relative to newer entrants. The company has held FedRAMP authorization, which supports its position in the U.S. federal government market.

Forescout has maintained R&D operations in Israel. The eyeInspect (SilentDefense) technology has roots in Israeli engineering, connected to the OT security expertise that characterized the Security Matters lineage. Detailed current information about the size and exact city location of Forescout's Israeli R&D team is not available in my training data.

Forescout

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