cybersecdirectory

All companies

Every cybersecurity vendor and service firm on the list. Tick the filters to build a shortlist, then open a profile to see who owns the company and what it does. You can also browse by category or country, or see recent deals.

Results

46 companies

See also MSSPs and companies based in the United States.

CompanyCategoryBased inFoundedOwnership
7AI

7AI provides AI agents that automate security operations centre tasks for enterprises.

Agentic SOC toolsBoston, United States2024Private
Alcott Enterprises Managed IT Services & Cybersecurity

Alcott Enterprises is a managed IT service provider and cybersecurity company based in Los Angeles.

Managed security servicesTorrance, United States2014Private
Armor

Provides cloud security, compliance and managed detection and response services to regulated industries.

Managed detection and responsePlano, United States2009Private
AT&T Cybersecurity

AT&T Cybersecurity provides network security services to businesses of all sizes.

SASE and SSESan Mateo, United States2007Owned by WillJam Ventures
BARR Advisory

BARR Advisory helps organisations establish, manage, and audit cybersecurity and compliance programmes.

Compliance audits (SOC 2, ISO 27001)Kansas City, United StatesPrivate
Black Hills Information Security

Community-driven penetration testing firm known for free security education, open-source tools, Wild West Hackin' Fest, and practical offensive security services.

Penetration testingSpearfish, United States2008Private
Booz Allen Hamilton

Cybersecurity consulting and engineering for US government and industry, including threat hunting, zero trust, incident response and defence of critical infrastructure and weapon systems.

Security consulting and vCISOMcLean, United StatesPrivate
Boston Managed IT

Boston Managed IT is a managed service provider based in Waltham, Massachusetts, founded in 2017.

Managed security servicesWaltham, United States2015Private
Clone Systems

Provides penetration testing, PCI ASV scanning, and managed security services for compliance and threat detection.

Penetration testingPhiladelphia, United States1998Private
Cloudrise

Cloudrise provides security services to enterprises and technology partners.

Managed security servicesGrand Junction, United States2019Part of Exclusive Networks
Critical Start

Critical Start provides managed detection and response services to monitor, investigate, and resolve security threats for organisations.

Managed detection and responsePlano, United States2012Owned by Vista Equity Partners
CyberSheath

CyberSheath provides cybersecurity compliance services for DOD contractors, focusing on CMMC, DFARS, and NIST standards.

GRC and compliance automationReston, United States2012Private
Cyderes

Cyderes provides managed cybersecurity services including identity, threat detection, and exposure management.

Managed detection and responseKansas City, United StatesPrivate
Dell Technologies

Computer and IT infrastructure maker whose PowerProtect Data Manager software and Data Domain appliances back up data, detect ransomware and speed recovery.

Backup and cyber recoveryRound Rock, United StatesPrivate
Druva

Druva provides a fully managed SaaS platform for data backup, recovery, and cyber resilience.

Backup and cyber recoverySunnyvale, United States2008Private
EC-Council

EC-Council is a cybersecurity certification and training body.

Security awareness and human riskUnited States2001Private
Expel

Expel provides managed detection and response security services using AI and human analysts.

Managed detection and responseHerndon, United States2016Private
Fastly

Fastly provides an edge cloud platform that helps businesses deliver, secure, and deploy applications and AI workloads.

WAF and bot protectionSan Francisco, United States2011Public, FSLY
Foresite Cybersecurity

Foresite provides managed detection and response services using agentic AI for security operations.

Managed detection and responseOverland Park, United StatesPrivate
Globalgig

Globalgig provides managed security and network services to enterprises across multiple countries.

Managed security servicesSan Antonio, United StatesPrivate
GuidePoint Security

US-headquartered cybersecurity consultancy with 800+ employees, serving ~40% of the Fortune 500. FedRAMP 3PAO, PCI QSA, and HITRUST accreditations.

Managed security servicesReston, United States2011Private
IBM

IBM is a technology company that sells software, infrastructure, and consulting services.

SIEMArmonk, United States1911Public, IBM
Integris IT

Integris provides managed IT, cybersecurity, AI and cloud services to small and midsize businesses.

Managed security servicesCranbury, United StatesPrivate
IntelliGRC

IntelliGRC provides software that helps managed service providers automate cybersecurity compliance and audit readiness.

GRC and compliance automationFairfax, United StatesPrivate
Jones IT

Jones IT provides managed IT services, cybersecurity, and compliance support to businesses in the San Francisco Bay Area.

Managed security servicesSan Francisco, United States2002Private
Kyndryl

Managed security operations, threat intelligence and incident response services delivered from global security operations centres by an IT infrastructure services provider.

Managed security servicesNew York, United StatesPrivate
LevelBlue (formerly Trustwave)

Managed security provider that now runs Trustwave's SpiderLabs penetration testing team, with CREST-accredited testing, red and purple teaming, and deep PCI DSS expertise.

Managed detection and responseChicago, United States1995Private
MonsterCloud

MonsterCloud provides managed cloud, IT and cyber security services, including ransomware recovery, to businesses across the United States.

Managed security servicesHollywood, United StatesPrivate
N-able

N-able provides cybersecurity and IT management software for managed service providers and businesses.

Managed security servicesBurlington, United StatesPublic, NABL
Netrio

Netrio provides managed IT, cybersecurity, cloud, and connectivity services to mid-market enterprises.

Managed security servicesMcKinney, United StatesPrivate
NETSCOUT

NETSCOUT provides real-time network visibility, observability, cybersecurity, and DDoS protection solutions.

DDoS protectionWestford, United States1984Public, NTCT
Network Brainiacs

Provides managed IT support, cybersecurity services and custom software to small businesses.

Managed security servicesMount Arlington, United States2011Private
nuHarbor

nuHarbor provides cybersecurity services and managed security operations to organisations across government, healthcare, finance and enterprise.

Managed security servicesUnited States2013Private
Ontinue

Ontinue provides managed detection and response services for Microsoft security customers.

Managed detection and responseRedwood City, United StatesOwned by Quorum Cyber
Optiv

Optiv advises, deploys, and operates cybersecurity programs for organizations.

Managed security servicesLeawood, United States1996Owned by KKR
Potenza Services

Potenza Services is a veteran-owned firm based in Tampa, Florida, founded in 2012.

OT and ICS securityQ49255, United States2012Private
PowerDMARC

PowerDMARC provides a cloud-based platform for email authentication and domain security.

DMARC and email authenticationPlano, United States2020Private
Quzara

Quzara provides FedRAMP compliance advisory and managed detection and response services.

Managed detection and responseVienna, United StatesPrivate
Redspin

Miami-based cybersecurity firm with 300+ employees and deep healthcare/HIPAA expertise. Delivering pen testing since 2000.

Compliance audits (SOC 2, ISO 27001)Miami, United States2000Owned by Clearwater
REJIS

REJIS provides technology solutions for public safety and government agencies.

Managed security servicesSt. Louis, United States1974Private
STACK Cybersecurity

Provides managed IT services, cybersecurity, compliance support and AI adoption guidance to businesses.

Managed security servicesLivonia, United StatesOwned by IT Solutions
Swimlane

Swimlane provides agentic AI automation for security operations, vulnerability management, and compliance.

SOAR and security automationDenver, United States2015Private
Team Cymru

Team Cymru provides global threat intelligence from internet traffic for proactive defence.

Threat intelligenceLake Mary, United StatesPrivate
UnderDefense

UnderDefense provides managed detection and response, incident response, and compliance automation services.

Managed detection and responseNew York, United States2017Private
XTIUM

Provides managed IT services including security, cloud desktops, networks and AI deployment support.

Managed security servicesOldsmar, United StatesPrivate
Z-JAK Technologies

Z-JAK Technologies is a Louisville-based provider of managed IT and cybersecurity services for small and midsize businesses, typically with 5 to 150 employees.

Managed security servicesLouisville, United States2020Private