Citadel

Is a collaboration suite (messaging and groupware).

18 Alternatives To Citadel

AWS IoT Device Defender

Manage the security of your fleet. With AWS IoT Device Defender, you can audit and monitor device configurations. Get started today.
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Armis

The leading enterprise-class agentless device security platform to address the new threat landscape of unmanaged and IoT devices.

Broadkey

BroadKey: Key Provisioning Software IP for IoT security. Hardware Root of Trust via unclonable device identities. Deploy any time in device lifecycle.

Cyberbit

Cyberbit provides the most widely used Cyber Range training and simulation platform, as well as SOAR, ICS Security and EDR for IT/OT detection and response.

Google Cloud IoT Core

A fully managed service to easily and securely connect, manage, and ingest data from globally dispersed devices

Kolab Community

Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

Microsoft Exchange Server

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.
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Mocana

Mocana’s comprehensive cybersecurity solutions are trusted to protect more than 100 million ICS and IoT devices.
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Spartan

Great clipboard with extras. See it in action at the get it here URL.

Symantec Critical System Protection

Symantec Critical System Protection is a flexible and compact behavioral security engine built with application whitelisting infused with anti-exploits for managed or standalone IoT devices.

Zimbra Collaboration Suite

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.

ioTrust IoT Security

Entrust Datacard IoT Security products ensure a Trusted Internet of Things by establishing a securely connected ecosystem.