Client Story: Chicago Stock Exchange.

Nothing is more important to us than our customers. Every day, Guardian Digital solutions help organizations around the world secure their most business-critical email assets from hackers and phishing attacks.

We are proud to have loyal customers, many of whom have been with us for more than a decade. They’ve shared their success stories with us and we’d like to share them with you and others in the IT community — we want your business to have the same email safeguards and peace of mind that others have found with Guardian Digital.

Whether it’s the comprehensive engineered security designed by our engineers, the cost-effectiveness of open source software, or our unparalleled customer support, Guardian Digital customers across the world rely on our expertise and ability to deliver value.


Secure Messaging, Comprehensive Support for Global Trading, Securities Firm

Chicago Stock Exchange

chicago stock exchange



  • Limited Ability for Downtime
  • Multiple Services from Same Vendor
  • Stringent Security Requirements
  • DNS Security & Email Phishing


  • Simplified Management
  • Powerful Functionality
  • Extensive Support Services
  • Cost-effective Solutions Scalability

Solution: EnGarde Cloud Email Security

  • Proactive protection against phishing, ransomware and other threats businesses face using email
  • Around-the-clock system monitoring, maintenance and support extends limited IT resources to improve security, maximize productivity and offer invaluable peace of mind
  • Flexibility to customize EnGarde to specifically fit the demands of the corporation


  • Enhanced Email Security
  • Advanced Threat Protection
  • Reduce Spam by >99%
  • Increased User Productivity

Secure Network Services, Critical Reliability

global trading and financial services company protects email threats from phishing and ransomware attacks

Security and time-management are critical concerns for Dave Coder, manager of network services at Chicago Stock Exchange. When the requirement came from his management to deliver a highly-secure and easy to manage platform for delivering enterprise email and DNS services to his customers, Guardian Digital developed for them a comprehensive solution using their flagship product.

The engineered security provided by Guardian Digital EnGarde Email Security Gateway was the ideal choice. "Systems in the DMZ must remain secure, Guardian Digital's comprehensive security solutions not only kept our network protected but also supplied ease of management, saving us valuable time," states David Coder.

Consistent, Reliable Security

With successful Internet security breaches at an all-time high, a consistently secure Internet solution is a permanent requirement. "Keeping network defenses working depends on how current the system is. Guardian Digital makes patch maintenance simple through their support network and automatic update management system. They constantly are monitoring the security of the system to ensure it always remains protected," writes Coder.

Pain-free Implementation, Exceptional Results
"The team consistently showed they were fully committed to getting us up and running as quickly and as seamlessly as possible. Our stringent security requirements were implemented without incident.

- Dave Coder, Network Services Manager, Chicago Stock Exchange

Comprehensive Protection Beyond Competing Solutions

Initially considering alternatives including enterprise offerings from Microsoft, Symantec and Proofpoint, the ultimate decision was in favor of Guardian Digital. Proving to have the most complete user interface and easiest implementation, Chicago Stock Exchange is pleased with their choice. "The comprehensive GUI for configuration and maintenance is an invaluable tool," says Coder. We were pleased to be able to find a solution compatible with our current hardware instead of being forced into some unknown hardware platform like some other vendors require."

Currently, the Chicago Stock Exchange is running three Guardian Digital cloud instances which they are using for Email and DNS applications. Although open source was not a primary requirement, the Chicago Stock Exchange preferred a Linux system as their implementation platform based on its security & DNS capabilities. After testing many products and various ways to secure them, the Chicago Stock Exchange reported Guardian Digital was by far the easiest to implement and consistently proves itself to be a rock-solid, stable system.