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Overview
Fend makes hardware devices that securely move data from equipment using full optical isolation, so data can only flow in one direction and attackers can’t reach the network. The devices collect data, send it to the cloud for machine learning analysis, and keep the data channel physically isolated during the process. Manufactured in the United States, the hardware is sold to utilities, transportation, HVAC operators, and government customers, differentiating it from software-only security approaches. The goal is to prevent cyber threats from reaching operational networks while enabling secure data analytics for critical infrastructure.
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Simplify's take
What believers are saying
- OPSWAT updated Fend on 2026-11-05, signaling active product investment after the acquisition.
- The 2026-04 Emerson partnership expands OPSWAT reach into power and water operators.
- Fend’s U.S.-built manufacturing story matches federal and critical-infrastructure procurement preferences.
What critics are saying
- Fend’s standalone brand is gone; OPSWAT can reallocate engineering away from diodes anytime.
- OPSWAT now competes directly with Owl Cyber Defense and Everfox in government deals.
- If OPSWAT discontinues Fend hardware lines, installed customers face migration and support shocks.
What makes Fend unique
- Fend’s 2024 acquisition by OPSWAT plugs data diodes into a broader OT security platform.
- Its hardware-enforced optical isolation blocks inbound traffic, unlike software-only segmentation tools.
- Firmware 4.3.0 adds MQTT, syslog, and protocol conversion for industrial workflows.
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