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Unmatched Expertise
in Managed Detection and Response

Castra delivers a comprehensive suite of best-in-class MDR services, built on the market-leading Exabeam SIEM platform, as well as USM Anywhere for smaller organizations - tailored to the unique security requirements of each customer.

Cyberthreats continue to evolve, and attack surfaces continue to grow

Many Castra customers leverage a modern IT architecture, with apps deployed on-premises and across one or more clouds. In addition, employees and customers requiring network access could be located anywhere. For that reason, Castra relies on best-of-breed security technologies to ensure complete visibility across the entire attack surface, as well as deep insights into complex cyber threats.  This intelligence enables Castra’s security analysts to detect and mitigate threats before they can achieve their objectives.

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"We have the expertise to develop custom SIEM rules that help each customer optimize SIEM performance and extract maximum security value to protect their organization."

Tony Simone

Co-Founder, Castra

"Castra provides full operational transparency with every customer, which builds trust, improves collaboration, and ultimately strengthens a customer’s cyber defense."


Co-Founder, Castra

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SIEM Implementation

With over 2,000 SIEMs implemented globally, and decades of cybersecurity experience, Castra can cover everything from SIEM deployments in the customer SOC to non-stop 24X7 detection and mitigation of cyberattacks.

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Complete Transparency

There are no secrets when you work with Castra. From Day 1, we will act as a trusted cybersecurity partner and a seamless extension of your internal team, providing complete transparency and accountability.

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Exabeam Expertise

Deeper knowledge of the Exabeam platform than any other MDR provider, resulting in custom rules that help customers detect and mitigate threats based on both malicious content and, even more evasive, malicious behaviors.

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An elevated operations center

Castra operates a world-class virtual SOC staffed with analysts that provide customers with decades of experience detecting and mitigating advanced cyber threats.  Independent auditors have awarded Castra with SOC 2 Type II accreditation and compliance based on their support of data security principles that include security, availability, integrity, confidentiality, and privacy. This prestigious designation is evidence of Castra’s commitment to total security and operational transparency with every customer.



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Make Our Security Operations Center Part of Your Success Story

Our security operations center combines the industry’s most advanced technologies with human insight from highly experienced security analysts. When designing our US-based security platform, we drew on years of experience building and managing 24x7 security operations centers, SIEM platforms, IDS devices, and more.

The result is a comprehensive security service that empowers IT teams to detect and respond to threats in real-time. Our managed detection and response service acts as an extension of your security team, providing visibility and insight into your security posture.


We tailor security solutions around the unique demands of your environment.



Peer Reviews

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Our Mission

To maximize the value of complex security tools by providing clients with simple, repeatable results.

What Castra Stands For

We founded this company on four principle values that inform how we achieve this mission. They are:

  1. Honest, Ethical Behavior
  2. Trustworthy Expertise
  3. Security First Mindset
  4. "Ray of Sunshine" Service

Our Story

Castra was founded in 2012 by Grant Leonard and Tony Simone. Initially, they focused on customized SIEM installations for more than 2,000 organizations across the US and Europe.  Over time, Castra began offering a suite of MDR services based primarily on the market-leading Exabeam SIEM platform.  Castra’s commitment to service excellence and operational transparency helped it earn Exabeam’s prestigious Partner of the Year award in 2020, 2021, and 2022 while continuing to achieve an unsurpassed level of customer loyalty.

Ready to experience an MDR provider that delivers unmatched security and operational transparency?

Learn more about the specific Castra MDR service that’s right for your business. Schedule a time that’s convenient for you, and we’ll give you more insights into our security expertise, tailored services, and commitment to full transparency.