Find Top Cybersecurity Companies & MSSPs

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Aristi is a UK-based cybersecurity company founded in 2008 and located at the Innovation Centre Longbridge Technology Park in Birmingham. It specializes in providing a wide range of cybersecurity services to both public and private sectors. With over 15 years of experience, Aristi is recognized as a leading provider of penetration testing services and is approved by the National Cyber Security Centre (NCSC), holding CHECK and CREST accreditations.

Armor Defense, founded in 2009 and based in Texas, is a cybersecurity company that specializes in cloud-based cyber defense solutions. The company focuses on industries such as e-Commerce, healthcare, and financial institutions. Originally established as Firehost, Armor transitioned to a fully managed service provider model by 2021.

Astro Information Security is a cybersecurity firm founded by experts from NASA and NSA, boasting over 100 years of combined experience. The company focuses on providing advanced cybersecurity solutions to protect organizations from various cyber threats, including sophisticated attacks. Their mission is to secure the operations and futures of clients ranging from small businesses and nonprofits to hospitals and regulated industries.

Atlantic Data Security, LLC is a cybersecurity company based in East Hartford, Connecticut, founded in 1993. The company focuses on reducing IT security risks by offering customized cybersecurity solutions for both large enterprises and small to medium-sized businesses across New England and nationwide.

Atomus is a cybersecurity company founded in 2019, based in San Francisco, California. It was established as part of a Department of Defense initiative to create advanced cybersecurity solutions for the aerospace and defense sectors. Atomus focuses on assisting small and medium-sized businesses in the defense industrial base to comply with cybersecurity standards such as NIST 800-171, DFARS 7012, ITAR, and the Cybersecurity Maturity Model Certification (CMMC).

Avantgarde Partners is a focused cybersecurity consultancy that delivers managed programs that triage security alerts through orchestrated responses, which ultimately improves intelligence within the SOC. We work with the leading Security Automation & Orchestration platforms in the market to develop and continually manage automation play books.

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Avella is a boutique Managed Security Service Provider (MSSP) based in Birmingham, United Kingdom. Founded in 2015 and rebranded in 2025, the company specializes in cybersecurity services, including managed security, incident response, and cyber audits. Avella is recognized as an NCSC Assured Service Provider, demonstrating its commitment to high standards in cybersecurity.

Bayside Solutions, Inc. is an information security solutions provider delivering a wide range of computer network and security products and services that increase security, improve productivity and efficiently serve business requirements.

BigScoots® is a premium web hosting company that offers Shared, VPS (Virtual Private Server), Hybrid, and Dedicated hosting services. The company is recognized for its exceptional support and fully managed hosting platforms, all provided in-house.

Binary Defense is a managed security services provider and software developer based in Stow, Ohio. The company specializes in advanced cybersecurity solutions, offering a range of services such as SOC-as-a-Service, Managed Detection & Response, Security Information and Event Management, Threat Hunting, and Counterintelligence. These services are designed to quickly detect intruder activity and provide expert analysis and response, helping businesses reduce cyber risk.

BitLyft Cybersecurity is a U.S.-based company founded in 2016 by Jason Miller, who has nearly 30 years of experience in IT. The company specializes in Managed Detection and Response (MDR) services, offering real-time threat monitoring and rapid incident response for small to mid-sized organizations across various industries, including Higher Education, Financial Services, Industrial Manufacturing, Technology, and Utilities.

Black Hills Information Security (BHIS) is a cybersecurity company based in Spearfish, South Dakota, founded in 2008. The company specializes in penetration testing, consulting, and defensive security services, helping clients enhance their information security infrastructure. BHIS serves a wide range of customers, from small community banks to Fortune 100 companies.

Blackpoint Cyber is a cybersecurity company founded in 2014 by experts from the U.S. Department of Defense and intelligence sectors. Headquartered in Denver, Colorado, with a presence in Maryland, the company focuses on providing advanced cybersecurity solutions to protect organizations from evolving cyber threats.

BlueOrange Compliance, a CloudWave company, is a leader in information privacy and security, regulatory compliance, and risk management services. We are a national provider of security risk assessments, analysis, corrective action plans and guidance to healthcare clients and business associates.

Providing outsourced IT services for small and medium sized businesses.

Bridewell is an independent cyber security services company founded in 2013 and headquartered in the UK, with offices in multiple locations including Cardiff, Cheltenham, Edinburgh, Houston, London, Manchester, and Reading. It has rapidly grown to become one of the largest cyber security providers in the UK and has expanded into the US to support global clients.

Business Computer Solutions, known as BCS365, is a managed IT services and cybersecurity company founded in 2011, with headquarters in the United States and offices in the UK. The company specializes in providing tailored IT solutions for various industries, including life sciences, pharmaceuticals, and manufacturing.

Ionic is a leading Managed IT & Cloud Services company. We help our clients and employees harness the power of IT to improve performance, ensuring they thrive in today's dynamic technological world. ??????