Network security companies in Connecticut focus on protecting digital assets from cyber threats. This industry features firms offering services such as managed security, incident response, and regulatory compliance. Many companies cater to specific sectors like finance, healthcare, and retail, reflecting the need for tailored security measures in these areas. Looking ahead, the industry shows growth potential as cyberattacks increase, prompting businesses to invest in proactive security solutions. With a mix of established players and innovative startups, Connecticut is positioned to remain a key hub for cybersecurity, bolstered by a skilled workforce and supportive business environment.

The network security sector in this list includes 21 companies, varying in size from small teams to well-established firms with hundreds of employees. Most were founded between 1996 and 2018, showcasing a mixture of industry longevity and fresh perspectives. Companies are headquartered across Connecticut in cities like Stamford, Norwalk, and Milford, specializing in a range of services from cybersecurity consulting to data protection and managed IT services. Their focused expertise allows them to address specific needs faced by modern businesses.

Continue reading to discover top network security companies in Connecticut.

Top 21 Network Security Companies in Connecticut

1. Atlantic Data Security, LLC

• Website: atlanticdatasecurity.com
• Ownership type: Private
• Headquarters: East Hartford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2011
• Headcount: 51-200
• LinkedIn: atlantic-data-security-llc

Atlantic Data Security, LLC, based in East Hartford, Connecticut, is a cybersecurity firm founded in 2011. With a workforce of approximately 68 employees, the company specializes in providing comprehensive security solutions tailored to the unique needs of businesses across various sectors, including retail, healthcare, and finance. Their service offerings include managed security services, application security, data protection, and network security, among others. The firm prides itself on its team of highly skilled cybersecurity engineers, who collectively bring over 30 years of experience to the table. This expertise allows them to effectively safeguard digital assets against a wide array of cyber threats. Atlantic Data Security has established a reputation for customizing its services to adapt to the evolving cybersecurity landscape, ensuring that clients receive the most relevant and effective protection. The company has not reported any funding, indicating a self-sustained operational model.

2. CyberSecOp - Cyber Security Operations Consulting

• Website: cybersecop.com
• Ownership type: Private
• Headquarters: Stamford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 51-200
• LinkedIn: cybersecop

CyberSecOp - Cyber Security Operations Consulting is a cybersecurity consulting firm based in Stamford, Connecticut, founded in 2008. With a workforce of around 51-200 employees, the company specializes in a wide array of cybersecurity services, including incident response, risk management, and compliance consulting. Their clientele spans multiple sectors, notably financial services and healthcare, where they help organizations enhance their cybersecurity measures and ensure adherence to regulatory requirements. CyberSecOp is recognized for its tailored approach, providing customized solutions that align with the unique needs of each client. The firm has also received accolades for its performance, being ranked among the top cybersecurity consulting firms by Gartner Peer Insights. Their commitment to cybersecurity is further evidenced by their certifications as a CMMC-AB RPO and ISO 27001 Implementor, showcasing their dedication to maintaining high standards in the industry.

3. Vancord

• Website: vancord.com
• Ownership type: Private
• Headquarters: Milford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: vancord

Vancord, based in Milford, Connecticut, is a private IT services and cybersecurity firm founded in 2005. With a workforce of approximately 51-200 employees, Vancord specializes in providing managed IT services and cybersecurity solutions tailored to the needs of mid- to large-sized businesses. Their service offerings include cybersecurity readiness, incident response, vulnerability assessments, and compliance support, particularly in relation to CMMC standards. Vancord has built a reputation for delivering fast incident response to data breaches and cyberattacks, utilizing advanced technologies to safeguard their clients' digital assets. The company is recognized for its commitment to continuous monitoring and threat intelligence, ensuring that organizations are well-prepared to face evolving cyber threats. Vancord also engages with the community through initiatives like their CyberSound podcast, which discusses current cybersecurity challenges and solutions.

4. Datto, Inc.

• Website: datto.com
• Ownership type: Corporate
• Headquarters: Norwalk, Connecticut, United States (USA)
• Latest funding: $6.2B, April 2022
• Founded year: 2007
• Headcount: 1001-5000
• LinkedIn: datto-inc-

Datto, Inc., founded in 2007 and based in Norwalk, Connecticut, is an IT solutions provider that specializes in cybersecurity and data backup. The company offers a range of products aimed at managed service providers (MSPs) to ensure business continuity and disaster recovery. Their solutions include SIRIS, ALTO, and SaaS Protection, which are designed to protect critical data and applications for various businesses. Datto's innovative approach allows MSPs to deliver effective IT services to their clients, enhancing their operational capabilities. The company has received significant funding, totaling $6.2 billion as of April 2022, which underscores its growth and relevance in the IT sector. Datto's commitment to cybersecurity is evident in its offerings, which include managed security operations and advanced threat detection, positioning it as a key player in the network security industry.

5. TBNG Consulting

• Website: tbngconsulting.com
• Ownership type: Private
• Headquarters: Milford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2005
• Headcount: 11-50
• LinkedIn: tbng-consulting

TBNG Consulting, also known as Vancord, is a private IT consulting and cybersecurity services firm based in Milford, Connecticut. Founded in 2005, the company has grown to employ around 22 professionals. Vancord specializes in providing managed IT services, cybersecurity readiness, and incident response solutions tailored for mid- to large-sized businesses. Their service offerings include vulnerability assessments, penetration testing, dark web monitoring, and compliance support, particularly for CMMC. Vancord is recognized for its proactive approach to cybersecurity, helping organizations prepare for and respond to cyber threats effectively. They have established a reputation for delivering high-quality service and support, particularly in the Northeast region of the United States, where they cater to various industries, ensuring that their clients can navigate the complexities of digital security.

6. The Computer Company, Inc.

• Website: computercompany.net
• Ownership type: Private
• Headquarters: Cromwell, Connecticut, United States (USA)
• Employee distribution: United States (USA) 83%, Iran 17%
• Founded year: 1996
• Headcount: 11-50
• LinkedIn: the-computer-company-inc.

The Computer Company, Inc., founded in 1996 and based in Cromwell, Connecticut, is a private IT services provider specializing in managed IT services, cybersecurity, and compliance solutions. With a workforce of around 54 employees, the company has established itself as a reliable partner for businesses across various sectors, including healthcare, finance, and professional services. Their service portfolio includes cybersecurity measures such as endpoint detection and response, dark web monitoring, and multi-factor authentication, which are essential in today's threat landscape. The company also offers compliance services to help clients navigate complex regulations like HIPAA and CMMC. Their commitment to ongoing training and adaptation to industry trends ensures they remain relevant and effective in addressing the evolving challenges of network security.

7. Axiom Technology Group

• Website: thinkaxiom.com
• Ownership type: Private
• Headquarters: Stamford, Connecticut, United States (USA)
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: axiom-technology-group

Axiom Technology Group, also known as Sourcepass, is an IT services and cybersecurity firm based in Stamford, Connecticut. Founded in 2009, the company has grown to employ between 51 and 200 individuals. Sourcepass specializes in a wide array of technology solutions, with a strong emphasis on cybersecurity. Their offerings include managed IT services, security assessments, and governance, risk, and compliance services. They serve clients across multiple sectors, such as healthcare, finance, and education, helping organizations enhance their IT infrastructure and secure their data. The company operates a 24/7 Security Operations Center, which plays a crucial role in monitoring and responding to security threats. This proactive approach to cybersecurity is complemented by their focus on training and awareness, ensuring that clients are equipped to handle potential risks. Sourcepass has not reported any funding, indicating a self-sustained growth model.

8. CompassMSP

• Website: compassmsp.com
• Ownership type: Private Equity
• Headquarters: West Hartford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: February 2025
• Founded year: 2015
• Headcount: 201-500
• LinkedIn: compass-msp

CompassMSP, founded in 2015 and based in West Hartford, Connecticut, is an IT services firm that specializes in managed IT and cybersecurity solutions tailored for small to mid-sized businesses. With a workforce of approximately 183 employees, the company operates across multiple locations in the United States, including Florida, Illinois, Maryland, New Jersey, New York, and Pennsylvania. CompassMSP offers a comprehensive suite of services, such as IT consulting, compliance services, network assessment, and managed cybersecurity, catering to industries like healthcare, finance, and manufacturing. Their business model emphasizes strategic IT support, aiming to enhance operational efficiency and security for their clients. The firm has been recognized in the Inc. 5000 list of America’s most successful companies and has ranked in CRN's Managed Service Provider 500 and Channel Futures MSP 501 rankings, showcasing their commitment to excellence in the cybersecurity sector.

9. Network Support Co

• Website: network-support.com
• Ownership type: Corporate
• Headquarters: Danbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2021
• Founded year: 1996
• Headcount: 51-200
• LinkedIn: the-network-support-company

Network Support Co, known as Logically, is an IT service provider based in Danbury, Connecticut, founded in 1996. With a workforce of approximately 51-200 employees, the company has carved out a niche in managed IT and cybersecurity solutions. Logically offers a comprehensive suite of services that includes cybersecurity, data center management, cloud solutions, and compliance support. Their cybersecurity offerings feature managed firewall services and SentryXDR, a solution designed to monitor and protect network activity. The company serves a wide range of clients across various sectors, helping them enhance their IT infrastructure and security posture. Logically has built a reputation for its commitment to infusing security into all aspects of IT management, ensuring that clients can focus on their core business operations while maintaining a robust security framework.

10. Charles IT

• Website: charlesit.com
• Ownership type: Private
• Headquarters: Middletown, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2006
• Headcount: 51-200
• LinkedIn: charlesit

Charles IT, founded in 2006 and based in Middletown, Connecticut, is a private IT consulting firm with a workforce of approximately 111 employees. The company specializes in managed IT services, cybersecurity solutions, and compliance assistance, catering primarily to industries such as healthcare, financial services, and manufacturing. Their services include proactive IT support, security awareness training, endpoint encryption, and various compliance frameworks like HIPAA and SOC2. Charles IT has established itself as a trusted partner for organizations navigating the complexities of IT security and compliance, ensuring that their clients can operate efficiently while maintaining robust security measures.

11. Advanced Office Systems, Inc. (AOS)

• Website: aosinc.com
• Ownership type: Corporate
• Headquarters: Branford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 90%, Russia 10%
• Latest funding: August 2008
• Founded year: 2015
• Headcount: 51-200
• LinkedIn: advanced-office-systems

Advanced Office Systems, Inc. (AOS), founded in 2015 and based in Branford, Connecticut, is an IT service provider that specializes in a variety of technology solutions. With a workforce of approximately 70 employees, AOS has built a reputation for delivering managed services, IT consulting, and network security solutions tailored to the needs of businesses of all sizes. Their service offerings include comprehensive assessments, strategic IT planning, and ongoing support, which are crucial for maintaining secure and efficient IT infrastructures. AOS emphasizes a partnership approach, working closely with clients to understand their unique challenges and develop customized solutions. Their commitment to network security is evident in their proactive measures to protect clients from cyber threats, including identity management and disaster recovery services. AOS has serviced over 10,000 clients, showcasing their extensive experience in the industry. They maintain a strong focus on customer satisfaction, boasting a 95% satisfaction rate, which reflects their dedication to providing reliable and effective IT support.

12. Coveware

• Website: coveware.com
• Ownership type: Corporate
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: April 2024
• Founded year: 2018
• Headcount: 1-10
• LinkedIn: coveware

Coveware, founded in 2018 and based in Norwalk, Connecticut, is a cybersecurity firm that specializes in ransomware recovery and incident response services. The company assists organizations in managing ransomware incidents through expert negotiation and recovery strategies, ensuring minimal downtime and financial impact. Coveware's team leverages aggregated ransomware case data and refined negotiation techniques to provide superior incident response and recovery for their clients. They handle thousands of cyber extortion cases each year, offering services that include forensic triage, retained incident response, and the provision of decryption tools. Their commitment to transparency and compliance further enhances their reputation in the industry, making them a trusted partner for businesses facing cyber threats.

13. NSI (New England Systems, Inc.)

• Website: nsiserv.com
• Ownership type: Private
• Headquarters: Naugatuck, Connecticut, United States (USA)
• Founded year: 1985
• Headcount: 51-200
• LinkedIn: nsi-new-england-systems-inc--

NSI (New England Systems, Inc.), based in Naugatuck, Connecticut, has been a provider of IT support and cybersecurity services since its founding in 1985. The company specializes in offering comprehensive solutions tailored to small and medium-sized businesses and non-profits in Connecticut. Their service offerings include managed IT support, co-managed IT, and cybersecurity services, which encompass assessments and ongoing protection strategies. NSI is dedicated to enhancing clients' technology infrastructure while safeguarding them against cyber threats. The firm operates with a proactive mindset, ensuring that clients are not only protected but also educated about potential risks. Their commitment to customer satisfaction is evident in their approach to service delivery, which emphasizes understanding client needs and providing timely support. NSI's focus on cybersecurity is particularly relevant given the increasing frequency of cyberattacks targeting smaller organizations, making their services critical for businesses looking to fortify their defenses.

14. CyberGuard360

• Website: cyberguard360.com
• Ownership type: Private
• Headquarters: Wilton, Connecticut, United States (USA)
• Employee distribution: United States (USA) 57%, India 33%, Australia 10%
• Founded year: 2016
• Headcount: 11-50
• LinkedIn: cyberguard360

CyberGuard360, founded in 2016 and based in Wilton, Connecticut, is a private cybersecurity firm that specializes in providing a suite of products aimed at helping Managed Service Providers (MSPs) protect their clients from various cyber threats. The company offers tools such as risk assessments, dark web monitoring, and compliance training, which are essential for businesses looking to bolster their security measures and adhere to regulatory requirements. With a workforce of around 22 employees, CyberGuard360 has carved out a niche in the cybersecurity market, focusing on the needs of MSPs. Their product suite includes CP360 for cyber prospecting, PG360 for training and compliance, OB360 for technical risk assessments, and RA360 for functional risk assessments. This targeted approach has garnered positive feedback from clients, highlighting the effectiveness of their platform in addressing critical cybersecurity challenges.

15. Gyver Technologies

• Website: gyver.com
• Ownership type: Private
• Headquarters: Redding, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2005
• Headcount: 11-50
• LinkedIn: gyver-networks

Gyver Technologies, founded in 2005 and based in Redding, Connecticut, is a private IT consulting firm that specializes in networking solutions. With a team of 27 employees, the company has carved out a niche in providing comprehensive services that include Wi-Fi and cellular engineering, cybersecurity, and managed services. Gyver Technologies focuses on delivering tailored solutions to enhance connectivity and security for businesses and organizations. Their expertise spans various sectors, and they have a proven track record of working with both small businesses and larger enterprises, including Fortune 500 companies. The firm emphasizes the importance of safeguarding client networks and privacy, reflecting their commitment to cybersecurity. Gyver's innovative approach and extensive experience position them as a relevant player in the network security industry.

16. Resolute Partners

• Website: resolutepartners.com
• Ownership type: Corporate
• Headquarters: Southington, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: May 2019
• Founded year: 1997
• Headcount: 1-10
• LinkedIn: resolute-partners

Resolute Partners, founded in 1997 and based in Southington, Connecticut, is a security solutions provider that focuses on advanced network security services. The company offers a range of services, including commercial surveillance systems, live video monitoring, and IoT integration. They cater to various industries, such as education, healthcare, hospitality, and military, demonstrating their capability to address the security needs of both businesses and government agencies. Resolute Partners emphasizes the importance of operational efficiency and security, providing tailored solutions that enhance the safety and functionality of their clients' environments. Their expertise in government cybersecurity solutions further solidifies their position in the network security sector, as they meet stringent federal requirements and frameworks. With a small team of dedicated professionals, Resolute Partners aims to deliver secure and effective network management solutions across the United States.

17. Kairos Vision Consult

• Website: kairosvisionllc.com
• Ownership type: Private
• Headquarters: Stamford, Connecticut, United States (USA)
• Founded year: 2016
• Headcount: 51-200
• LinkedIn: kairos-vision-consult

Kairos Vision Consult LLC, based in Stamford, Connecticut, is a cybersecurity consulting firm established in 2016. The company offers a range of services aimed at helping businesses manage their cybersecurity needs. Their offerings include managed security services, compliance solutions, and risk assessments tailored to meet the specific requirements of various industries. They assist clients in navigating the complexities of cybersecurity threats and regulatory requirements, ensuring robust data protection. Their service portfolio includes compliance with standards such as GDPR, HIPAA, and PCI, as well as security incident response and penetration testing. With a team of skilled professionals, Kairos Vision Consult addresses the pressing security challenges faced by organizations today, making them a relevant player in the cybersecurity industry.

18. Star Computers LLC

• Website: starcomputers.com
• Ownership type: Private
• Headquarters: East Lyme, Connecticut, United States (USA)
• Employee distribution: United States (USA) 65%, Brazil 35%
• Founded year: 1998
• Headcount: 1-10
• LinkedIn: star-computers-llc

Star Computers LLC, based in Niantic, Connecticut, has been operational since 1998. The company provides a variety of IT services, with a strong emphasis on networking, security, and disaster recovery solutions. Their team consists of certified professionals who work closely with clients to tailor technology solutions that enhance operational efficiency and safeguard data. Star Computers offers managed security services, including endpoint protection and web security, which are crucial for businesses looking to protect their information from evolving threats. They also provide disaster recovery planning and backup solutions, ensuring that critical business data is secure and recoverable in case of unexpected events. The company primarily serves the Southern New England area, focusing on small to medium-sized businesses. Their commitment to customer satisfaction and technical excellence has helped them build a solid reputation in their local market.

19. Omni Data, LLC

• Website: myomnidata.com
• Ownership type: Private
• Headquarters: West Haven, Connecticut, United States (USA)
• Employee distribution: United States (USA) 82%, Morocco 18%
• Founded year: 1999
• Headcount: 11-50
• LinkedIn: omni-data-llc

Omni Data, LLC, based in West Haven, Connecticut, has been a player in the security solutions industry since its founding in 1999. The company specializes in designing and implementing advanced security and networking systems, catering primarily to contractors and building managers. Their service offerings include access control, surveillance, intrusion detection, and fire detection, all aimed at enhancing safety and operational efficiency. Omni Data prides itself on delivering customized solutions that address the specific needs of its clients. The company employs a team of certified professionals who are well-versed in the latest technologies and best practices in security. They maintain strong partnerships with reputable equipment manufacturers, ensuring that they provide high-quality products and services. Omni Data's commitment to innovation and customer-centric solutions positions them as a relevant entity in the network security industry.

20. Grey Matter Technologies

• Website: greymatterit.com
• Ownership type: Private
• Headquarters: Manchester, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: grey-matter-technology

Grey Matter Technologies, based in Manchester, Connecticut, is a private technology consulting firm founded in 1997. With a team of 19 employees, the company specializes in a wide array of IT services, including managed services, cloud solutions, and cybersecurity. They cater to businesses across multiple sectors, such as financial services, healthcare, and hospitality, helping clients manage their IT infrastructure effectively. Grey Matter emphasizes a customer-first philosophy, allowing businesses to focus on their core operations while relying on their expertise for technology needs. Their cybersecurity offerings include network security, monitoring, and disaster recovery solutions, showcasing their commitment to safeguarding client data and systems. Over the years, they have built a reputation for delivering tailored IT solutions that meet the unique challenges faced by their clients.

21. Protegrity

• Website: protegrity.com
• Ownership type: Corporate
• Headquarters: Stamford, Connecticut, United States (USA)
• Employee distribution: India 50%, United States (USA) 32%, United Kingdom (UK) 4%, Other 14%
• Latest funding: December 2004
• Founded year: 1996
• Headcount: 201-500
• LinkedIn: protegrity

Protegrity, founded in 1996 and based in Stamford, Connecticut, is a corporate entity specializing in data security. With a workforce of approximately 368 employees, the company has carved out a niche in providing advanced data protection solutions tailored for various industries, including financial services, retail, and healthcare. Protegrity's product suite includes innovative technologies such as vaultless tokenization and dynamic data masking, which help organizations safeguard sensitive information while ensuring compliance with regulatory standards. The company has established partnerships with major cloud service providers like AWS and Snowflake, enhancing its ability to deliver secure data solutions in cloud environments. Protegrity's focus on minimizing compliance risks and enabling secure data sharing positions it as a significant player in the data security industry.

Network Security Insights: Key Companies in Connecticut

Company	Headquarter	Size	Founded	Ownership
Atlantic Data Security, LLC	East Hartford, Connecticut, United States (USA)	51-200	2011	Private
CyberSecOp - Cyber Security Operations Consulting	Stamford, Connecticut, United States (USA)	51-200	2008	Private
Vancord	Milford, Connecticut, United States (USA)	51-200	2005	Private
Datto, Inc.	Norwalk, Connecticut, United States (USA)	1001-5000	2007	Corporate
TBNG Consulting	Milford, Connecticut, United States (USA)	11-50	2005	Private
The Computer Company, Inc.	Cromwell, Connecticut, United States (USA)	11-50	1996	Private
Axiom Technology Group	Stamford, Connecticut, United States (USA)	51-200	2009	Private
CompassMSP	West Hartford, Connecticut, United States (USA)	201-500	2015	Private Equity
Network Support Co	Danbury, Connecticut, United States (USA)	51-200	1996	Corporate
Charles IT	Middletown, Connecticut, United States (USA)	51-200	2006	Private
Advanced Office Systems, Inc. (AOS)	Branford, Connecticut, United States (USA)	51-200	2015	Corporate
Coveware	Norwalk, Connecticut, United States (USA)	1-10	2018	Corporate
NSI (New England Systems, Inc.)	Naugatuck, Connecticut, United States (USA)	51-200	1985	Private
CyberGuard360	Wilton, Connecticut, United States (USA)	11-50	2016	Private
Gyver Technologies	Redding, Connecticut, United States (USA)	11-50	2005	Private
Resolute Partners	Southington, Connecticut, United States (USA)	1-10	1997	Corporate
Kairos Vision Consult	Stamford, Connecticut, United States (USA)	51-200	2016	Private
Star Computers LLC	East Lyme, Connecticut, United States (USA)	1-10	1998	Private
Omni Data, LLC	West Haven, Connecticut, United States (USA)	11-50	1999	Private
Grey Matter Technologies	Manchester, Connecticut, United States (USA)	11-50	1997	Private
Protegrity	Stamford, Connecticut, United States (USA)	201-500	1996	Corporate

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