The landscape of information security companies in Connecticut is vast and diverse, offering a broad range of digital protection services. These companies, such as SDG Corporation, CompassMSP, and ADNET Technologies, operate in the crucial industry of cybersecurity, securing the functionality and integrity of businesses' data in our data-abundant world. They provide comprehensive technological solutions such as risk management, data recovery, and managed IT support. Additionally, these companies offer dynamic cybersecurity protection and consultative solutions for businesses of all sizes. The industry, driven by the increasing requirements for digital protection, is steadfastly advancing towards new technological developments, creating more efficient and robust cybersecurity solutions.


Top 21 information security companies in Connecticut

1. SDG Corporation: IT Security and Risk Management Solutions

  • Website: sdgc.com
  • Headquarters: Norwalk, Connecticut, United States
  • Founded: 1993
  • Headcount: 201-500
  • Latest funding type: Series Unknown
  • LinkedIn

SDG Corporation is a global cybersecurity, identity governance, risk consulting, and advisory firm. They specialize in advising and partnering with clients to address complex security, compliance, and technology needs. SDG delivers on strategy, transformation, and long-term management of cybersecurity and identity and access management (IAM) programs.


2. CompassMSP

  • Website: compassmsp.com
  • Headquarters: West Hartford, Connecticut, United States
  • Founded: 2016
  • Headcount: 201-500
  • LinkedIn

CompassMSP is a leading IT services company that offers comprehensive network monitoring, data backup & recovery, managed IT support, cybersecurity, IT consulting, compliance services, and business cloud solutions. They provide 24/7 network monitoring services to detect and address security threats immediately, ensuring their clients' networks remain secure. With a dedicated team of experts, CompassMSP delivers reliable and efficient IT solutions to businesses of all sizes.


3. ADNET Technologies

  • Website: thinkadnet.com
  • Headquarters: Rocky Hil, Connecticut, United States
  • Founded: 1991
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

ADNET Technologies is an IT management and cybersecurity firm that provides industry-leading services in Managed IT Services, Cloud, and Cybersecurity. With offices in Connecticut and New York, they offer a human-centered approach to client engagements. ADNET Technologies is recognized regionally as one of the Best Places to Work and ranks nationally and globally among top MSPs.


4. Atlantic Data Security, LLC

Atlantic Data Security is a premier cybersecurity solutions provider that offers managed security services (MSS) and support to organizations. They specialize in vulnerability assessments, penetration testing, and perimeter security to protect against cyber threats. Their in-house certified engineers provide comprehensive security courses and training. With a focus on cloud and virtualized security, network security, and data security, they offer a complete spectrum of cybersecurity essentials.


5. Charles IT

  • Website: charlesit.com
  • Headquarters: Middletown, Connecticut, United States
  • Founded: 2006
  • Headcount: 51-200
  • LinkedIn

Charles IT is a technology company providing proactive IT support, unlimited IT support, and vCISO support. They offer IT solutions to meet specific needs, including endpoint encryption, managed VoIP phones, and security information & event management. Their services cater to non-profits, businesses in various industries, and organizations with highly regulated technology. They prioritize IT compliance, specializing in HIPAA, CMMC, DFARS, 800-171, and SOC2. Charles IT aims to build real relationships with clients and ensure their satisfaction.


6. Razberi by ComNet

  • Website: razberi.net
  • Headquarters: Danbury, Connecticut, United States
  • Founded: 2011
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

Razberi.net is a company that provides simple and secure physical security solutions. They offer a software platform called Razberi Monitor™ that allows for centralized video surveillance and provides a top-down view of the physical security network without the need for IT resources. Their purpose-built line of servers, Razberi Core™, supports video management, recording, and analytics for centralized video deployments. With their EndpointDefender™ product, loaded with CameraDefense™ and ApplianceDefense™, they also offer impenetrable cybersecurity protection for IP cameras and other IoT devices.


7. BluSapphire Cyber Systems

  • Website: blusapphire.com
  • Headquarters: Stamford, Connecticut, United States
  • Founded: 2014
  • Headcount: 11-50
  • Latest funding type: Series A
  • LinkedIn

BluSapphire is a cybersecurity company that offers a comprehensive solution for incident lifecycle management across organizations. Their advanced threat detection and response platform helps businesses proactively detect and remediate cyber threats, minimizing downtime and cost of remediation. They provide both cloud-based and on-premise solutions, catering to various industries, including BFSI, education, manufacturing, and more.


8. Vancord

  • Website: vancord.com
  • Headquarters: Milford, Connecticut, United States
  • Founded: 2018
  • Headcount: 11-50
  • LinkedIn

Vancord is a company that specializes in optimizing organizational performance through the implementation and management of customized network solutions. They offer cybersecurity services such as vulnerability assessments, penetration testing, and dark web monitoring. Additionally, they provide project services, incident response, and event automation.


9. Hi-Link

Hi-Link Technology Group is an IT solution company that offers complete IT solutions for businesses. Their services include data center solutions, network design and virtualization, unified collaboration, cloud services, backup and disaster recovery, and cyber security. They also offer consulting services and focus on industries such as education, healthcare, local and state government, and small to medium businesses.


10. Cymonix

  • Website: cymonix.com
  • Headquarters: Hartford, Connecticut, United States
  • Founded: 2021
  • Headcount: 1-10
  • LinkedIn

Cymonix is a full-service information security management company that protects sensitive, confidential business information from unauthorized access, disclosure, distribution and destruction.


11. The TNS Group

  • Website: thetnsgroup.com
  • Headquarters: Stamford, Connecticut, United States
  • Founded: 1996
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

The TNS Group is a leading Managed Service Provider (MSP) offering reliable and flexible IT solutions to small and medium businesses. With a client-centric approach, TNS delivers top-tier partnerships, world-class technical expertise, and growth-oriented business models to help businesses outperform their competition. They provide managed IT services, data security, cloud managed services, and IT consulting to ensure businesses' operations are protected and optimized.


12. Connecticut Information Security, LLC

  • Website: ctinfosec.com
  • Headquarters: Wilton, Connecticut, United States
  • Founded: 2007
  • Headcount: 1-10
  • LinkedIn

Connecticut Information Security is a full-service cyber security firm specializing in protecting networks, aligning organizations with security standards and educating technology professionals on security-related topics and tools. At Connecticut Information Security, we are dedicated to proactively protecting the security of agencies and businesses and creating action plans to mitigate existing security risks. Our in-depth knowledge of cyber security threats, remediation techniques and governance make us the obvious solution when tackling your most important security needs. Our experiences range the full breadth of security development from tactical to strategic and technical to procedural. Our offerings include vulnerability assessments, network penetration testing, web application testing, strategic security guidance, policy review, research, training and more. Our goal at Connecticut Information Security is to provide your agency with a personal touch and a quality of service well beyond your expectations. Our unfaltering discipline ensures that you stay on track and your reputation stays in-tact.


13. Commprise

  • Website: commprise.com
  • Headquarters: Hartford, Connecticut, United States
  • Founded: 2010
  • Headcount: 11-50
  • LinkedIn

Commprise is a Managed Service Provider (MSP) based in Hartford, Connecticut that offers customized IT services to clients. They provide a comprehensive IT solution that supports and secures data, applications, and employees.


14. Circulent

  • Website: circulent.com
  • Headquarters: Darien, Connecticut, United States
  • Founded: 2003
  • Headcount: 11-50
  • LinkedIn

Circulent is an IT service provider offering managed services, cloud solutions, cyber security, VoIP, and printing services to businesses. They partner with clients to provide continuous, all-encompassing IT support.


15. Network Design Services, LLC

  • Website: ndstech.com
  • Headquarters: Woodbury, Connecticut, United States
  • Founded: 1993
  • Headcount: 11-50
  • LinkedIn

Network Design Services, LLC offers IT services and solutions for businesses, including virtualization, cloud computing, data backup, network design, and IT support. They aim to help companies save money and time while providing expert support to maintain peak operation in their IT network.


16. Euclid Security

We help companies defend against cyber attacks & people advance their career in Cybersecurity. Since 2017, Euclid Security has been providing a wide range of Cybersecurity services to help companies stay. We have also been providing cybersecurity training to help students and employees get a career or advance their knowledge in Cybersecurity. Contact us today for free consultation.


17. Computronix, LLC.

Computronix is a leading IT support and managed service provider that offers secure and innovative solutions to businesses. With over 25 years of experience, we prioritize building quality relationships and delivering exceptional service. Our services include IT support, cyber security, proactive and reactive support, cloud computing, disaster recovery, and digital forensics. We cater to professional services companies, doctors and medical practices, and international clients. Our mission is to empower businesses of all sizes to thrive in the digital age by providing reliable, scalable, secure, and technologically advanced IT solutions.


18. Twin Networks

Twin Networks is a professional IT services provider based in Centerbrook, CT. Founded in 2006, the company offers a range of services including network security, data backup and recovery, managed IT services, cloud computing, and technology consulting. They pride themselves on assembling the right team for any job and delivering successful outcomes for their clients. With a focus on customer satisfaction and long-term partnerships, Twin Networks goes above and beyond to ensure the success and peace of mind of their partners.


19. Southridge Technology

Southridge Technology is a technology service provider offering expert solutions for managed IT, cybersecurity, phone systems, cloud computing, hardware, network management, virus protection, and website & email services. They specialize in personalized, live, local, real-time support for businesses of all sizes, ensuring their technology runs smoothly 24/7/365.


20. Realized Solutions Inc.

  • Website: myrsi.com
  • Headquarters: Southington, Connecticut, United States
  • Founded: 2003
  • Headcount: 11-50
  • LinkedIn

RSI is an IT services company that offers comprehensive solutions for businesses. They provide support services for various IT needs, including technology procurement, budgeting, marketing, and maintenance. RSI aims to be a trusted partner for their clients, helping them navigate the ever-changing world of technology.


21. Gyver Technologies

  • Website: gyver.com
  • Headquarters: West Redding, Connecticut, United States
  • Founded: 2005
  • Headcount: 11-50
  • LinkedIn

Gyver.com is a technology company offering a range of services including network infrastructure design and support, help desk development, managed services, and robotics/IoT research and development.


Want to find more information security companies?


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