Best Managed Security Services Providers (MSSPs) - Page 4

How Many Managed Security Services Providers (MSSPs) Products Does G2 Track?

Total Products under this Category: 370

Category Stats (Oct 2026)

  • Average Rating: 4.59/5 (↑0.01 vs Sep 2026) The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: TierPoint (+0.4%) - Among all products in this category, TierPoint recorded the largest rating increase compared to last month

Last updated: October 23, 2026

How Does G2 Rank Managed Security Services Providers (MSSPs) Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 1,000+ Authentic Reviews
  • 370+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Managed Security Services Providers (MSSPs)

G2 Grid® for Managed Security Services Providers (MSSPs) plotting products by satisfaction and market presence

Highlighted products: SHI, ThreatSpike, Antarex, Rhymetec, Armour Cybersecurity, Check Point Infinity Global Services, Akamai Technologies Services, and Sophos Professional Services.

Underlying data: [Grid® JSON](https://www.g2.com/categories/managed-security-services-mssp/grids.json?focus%5B%5D=shi&focus%5B%5D=threatspike&focus%5B%5D=antarex&focus%5B%5D=rhymetec&focus%5B%5D=armour-cybersecurity&focus%5B%5D=check-point-infinity-global-services&focus%5B%5D=akamai-technologies-services&focus%5B%5D=sophos-professional-services)

CyberDuo

CyberDuo is a leading IT and Cybersecurity consultant based in Los Angeles. We make businesses more productive at the same time protecting them from external and internal cyber threats. Our services include Managed IT and Managed Security services, Cloud Computing and Compliance. In the world of IT, Cybersecurity became one of the challenging parts and that's the area we're extremely passioned about. Secure IT is what CyberDuo stands for.

Average Rating: 4.9/5.0

Total Reviews: 9

Who Is the Company Behind CyberDuo?

  • Seller: CyberDuo
  • Year Founded: 2010
  • HQ Location: Los Angeles, California
  • Twitter: @cyber2o
    80 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    31 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services
  • Company Size: 78% Medium, 67% Small

What Are Recent G2 Reviews of CyberDuo?

What Are G2 Users Discussing About CyberDuo?

Excel Micro

Excel Micro assists thousands of Resellers and Managed Service Providers in the protection of their customers with Next Generation Cyber Security.

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind Excel Micro?

  • Seller: Ziff Davis
  • Year Founded: 1995
  • HQ Location: New York
  • Twitter: @ziffdavis
    1,426 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    6,722 employees on LinkedIn®
  • Ownership: NASDAQ: ZD

Who Uses This Product?

  • Company Size: 50% Small, 50% Medium

What Are Recent G2 Reviews of Excel Micro?

What Are G2 Users Discussing About Excel Micro?

InfoSec Partners

Infosec Partners Managed Firewall Service delivers 24/7/365 firewall management that includes monitoring, detailed reporting & alerts of any suspicious activity, and risk analysis. Updates and patches will be applied after evaluation for risk at a time that will have the least down time.

Average Rating: 4.8/5.0

Total Reviews: 2

Who Is the Company Behind InfoSec Partners?

  • Seller: Infosec Partners
  • Year Founded: 1989
  • HQ Location: Burgess Hill, GB
  • Twitter: @InfoSecPartners
    529 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    644 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Large

What Are Recent G2 Reviews of InfoSec Partners?

What Are G2 Users Discussing About InfoSec Partners?

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Leidos

For more than 40 years we have been tackling some of the biggest problems that face our nation and our world.

Average Rating: 2.8/5.0

Total Reviews: 2

Who Is the Company Behind Leidos?

  • Seller: Leidos
  • Year Founded: 1969
  • HQ Location: Reston, Virginia
  • Twitter: @LeidosInc
    17,759 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    37,448 employees on LinkedIn®
  • Ownership: LDOS (NYSE)

Who Uses This Product?

  • Company Size: 50% Large, 50% Medium

Paul Reynolds

What is Paul Reynolds Cyber Security Consulting? Paul Reynolds Cyber Security Consulting is a specialist advisory practice delivering deep cyber security capability, governance, risk and compliance (GRC), ISO 27001 implementation and audit, and crisis-ready security leadership to regulated organisations across the UK, Europe, UAE, and USA. The practice operates as a senior, independent resource - providing Principal Architect and Fractional CISO expertise without the overhead of a large consultancy. Clients engage directly with Paul Reynolds, a CISSP-qualified, FBCS Chartered security professional with 25+ years of experience across critical national infrastructure, central government, FinTech, and enterprise. Core capability areas include: ISO 27001 - Full ISMS design, gap analysis, implementation, and audit preparation to certification GRC - Governance, risk, and compliance frameworks built to withstand regulatory and customer scrutiny Cyber Essentials & CE+ - End-to-end consultancy and accredited assessment via IASME Crisis Management & High-Stakes Security Decisions - Due diligence, control exception handling, incident response support, and regulatory audit defence Penetration Testing - CSTM-certified web application and infrastructure testing Cloud Security Architecture - Secure-by-design AWS, Azure, and multi-cloud environments Fractional CISO - Named board-level security leadership on a retained, part-time basis The practice is best suited to regulated SMEs, scale-ups, and programme teams who need senior security capability on demand - particularly where an audit, a contract, a certification, or a crisis has made security suddenly matter.

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind Paul Reynolds?

Who Uses This Product?

  • Company Size: 100% Large

What Are Recent G2 Reviews of Paul Reynolds?

Shadowbear Managed Cybersecurity

Shadowbear Managed Cybersecurity is a modern, outcomes-focused security solution built for growing businesses. Our service is designed to proactively defend your environment while staying affordable and easy to manage, even without an in-house security team. At its core, we combine real-time threat detection, 24/7 monitoring, and employee risk reduction through ongoing cybersecurity training and phishing simulations. We protect your Microsoft 365 or Google Workspace environments, endpoints, networks, and cloud systems with layered tools that are seamlessly integrated and fully managed by our team of experts. We offer essential services such as: - SIEM/XDR Monitoring & Response - Security Awareness Training - Compliance automation management Customers typically ask: Q: Do I need to be technical? A: No. We handle implementation, monitoring, and response. Q: What makes Shadowbear different? A: We focus on value, not bloat. You get best-in-class detection and training with no unnecessary complexity or hardware. Q: Will this help with compliance? A: Yes. We provide services to support SOC2, CMMC, NIST 800-171, ISO 27001, HIPAA, PCI, and more. Support ranges from assessments, to controls implementation and management, tailored to your compliance needs. Q: Is this overkill for a small business? A: Not at all. In fact, we’re purpose-built for small and mid-sized businesses. We scale with you, offering everything from essential monitoring to advanced threat detection and employee training. Q: Can you help with insurance or compliance requirements? A: Yes. We offer services that directly support HIPAA, CMMC, NIST, PCI, and cyber insurance readiness. We can also provide reports and documentation needed for audits. Whether you're preparing for a security audit or just trying to stop phishing attacks, Shadowbear gives you enterprise-level protection—without the enterprise headache. Perfect for small to mid-sized businesses that want peace of mind, not noise. Let our team focus on your security, so yours can focus on growth.

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind Shadowbear Managed Cybersecurity?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Shadowbear Managed Cybersecurity?

Sirius

Sirius is leading national solutions integrator focused on helping organizations transform their business by managing their operations, optimizing their IT, and securing it all. The Sirius team specializes in IT Strategy (Infrastructure and Operations), Security, Business Innovation (Digital and Data), Cloud, and Managed Services. Sirius solutions are built on proven technologies from top strategic partners, and delivered by the brightest minds in the business.

Average Rating: 4.6/5.0

Total Reviews: 7

Who Is the Company Behind Sirius?

  • Seller: Sirius Computer Solutions
  • Year Founded: 1980
  • HQ Location: Vernon Hills, Illinois, United States
  • Twitter: @SIRIUSXM
    308,774 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    18,386 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 43% Large, 43% Medium

What Are Recent G2 Reviews of Sirius?

What Are G2 Users Discussing About Sirius?

Thales

Thales Cyber Security Products (CSP) delivers Data Security, Application Security, Identity and Access Management (IAM), and Software Monetization. Its solutions protect sensitive data across on–premises, multi-cloud, and hybrid environments through encryption, identity controls, and application and API protection. Thales helps organizations achieve compliance, reduce cyber risk, strengthen data protection, enhance cloud security, and accelerate secure digital transformation at scale.

Average Rating: 4.3/5.0

Total Reviews: 3

Who Is the Company Behind Thales?

  • Seller: Thales Group
  • HQ Location: Austin, Texas
  • Twitter: @ThalesCloudSec
    6,935 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    46 employees on LinkedIn®
  • Ownership: EPA:HO
  • Total Revenue (USD mm): $15,854

Who Uses This Product?

  • Company Size: 67% Medium, 33% Large

What Are Recent G2 Reviews of Thales?

TrustNet

Since 2003, TrustNet has been a leading provider of managed security, consulting, and compliance services. We serve as clients’ strategic partners in helping organizations of all types and sizes secure and maintain the integrity of their businesses. Accelerator+: Advisory, Automation, Audit Our Accelerator+ is designed to provide a comprehensive and cohesive strategy towards compliance. We offer expert guidance to enhance security strategies, conduct thorough audits to ensure compliance and implement automated solutions to improve efficiency. Our team of certified technical experts is committed to delivering top quality compliance and security solutions to our clients. Cybersecurity: 24/7 Monitoring and Alerting Threat Management Network Security Vulnerability Management Log Management Penetration Testing Cybersecurity Risk Assessments Security Awareness
 Training Solutions Incident Response Cloud Security Managed IT Services Compliance: SOC/ SSAE18 SOX PCI QSA HIPAA ISO 27001 FedRamp GDPR LADMF CCPA

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind TrustNet?

  • Seller: TrustNet
  • Year Founded: 2003
  • HQ Location: Atlanta, US
  • LinkedIn® Page: www.linkedin.com
    43 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 50% Medium, 50% Small

What Are Recent G2 Reviews of TrustNet?

Zazz

Zazz is a trusted software engineering and IT services partner helping enterprises deliver secure, scalable, and high-impact technology initiatives. We specialize in solving complex enterprise challenges - legacy bottlenecks, technical debt, talent shortages, compliance risks, and system fragmentation - so our clients can move faster, scale smarter, and innovate with confidence. Why Enterprise Leaders Choose Zazz: End-to-End Software Engineering: From strategy to deployment, we build custom digital products and platforms aligned with your business goals and technical landscape. Managed IT & Cloud Services: Proactive IT operations, cloud infrastructure management, and 24/7 support to ensure reliability, performance, and continuity at scale. Cybersecurity & Compliance Engineering: Enterprise-grade security architecture, secure-by-design development, and audit-ready solutions built to meet ISO 27001, HIPAA, GDPR, PCI-DSS, and other standards. Strategic IT Staff Augmentation: Deploy high-performing engineering pods, DevOps specialists, cloud architects, or cybersecurity experts—on demand, across any region. Global Delivery with Local Alignment With delivery centers across North America, LATAM, and APAC, we provide timezone-aligned talent and seamless collaboration tailored to your internal processes and culture. Enterprise-Proven Track Record Over 300 successful projects delivered and a 92% client repeat rate—our work speaks through long-term impact, not just code. Our Core Capabilities Include: Custom Software Development Cloud & DevOps Cybersecurity Services Legacy System Modernization IT Managed Services Data & AI Enablement IT Staff Augmentation Let’s bring your next strategic initiative to life - securely, efficiently, and at enterprise scale.

Average Rating: 4.8/5.0

Total Reviews: 2

Who Is the Company Behind Zazz?

  • Seller: Zazz
  • Year Founded: 2009
  • HQ Location: Toronto, CA
  • Twitter: @Zazz_Official
    49 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    179 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 50% Small, 50% Medium

What Are Recent G2 Reviews of Zazz?

Acuative

Acuative provides the world’s leading companies with a complete range of advanced technology and managed services, enabling customers to utilize a single source provider for all of their network requirements. We have extensive relationships with over 100 manufacturers and carriers across the world. We are a Cisco Gold Managed Services partner and have longstanding partnerships with Cradlepoint, Fortinet and Juniper. Acuative has a specific focus and expertise in implementing and managing voice & data networks in a highly secure environment. Acuative simplifies the entire process of managing today’s technology. We leverage a powerful combination of expertise, round-the-clock availability and extensive technical resources to deliver faster efficiency gains, speed to implement and the highest return on investment to our customers.

Average Rating: 4.6/5.0

Total Reviews: 8

Who Is the Company Behind Acuative?

  • Seller: Acuative
  • Year Founded: 1984
  • HQ Location: Fairfield, NJ
  • Twitter: @Acuative
    339 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    636 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 75% Large, 13% Medium

What Do G2 Reviewers Say About Acuative?

AI-generated summary from verified user reviews

Pros
  • Users commend the expertise of Acuative's skilled professionals, who arrive prepared and ready to tackle challenges.
  • Users value the thoroughly professional approach of Acuative, appreciating their personal touch and attentive service.
  • Users value the attention to detail at Acuative, noting their professional yet personal problem-solving approach.
  • Users admire Acuative's innovative solutions, which provide reliable telecommunications for businesses of all sizes.
  • Users value the personalized problem-solving approach of Acuative, feeling genuinely supported in their needs.
Cons
  • Users feel that poor customer support hinders their experience, highlighting a lack of timely communication and acknowledgment.

What Are Recent G2 Reviews of Acuative?

All Covered

All Covered is an award‑winning managed IT and cybersecurity provider that partners with organizations to elevate IT from a cost center into a strategic growth driver. With over 25 years of experience, deep technology partnerships, and a team of more than 500 experts, All Covered offers proactive monitoring, endpoint protection, cloud migrations, compliance consulting, and unified communications with 24×7×365 U.S.-based support. By delivering tailored IT roadmaps covering cybersecurity, Microsoft 365 management, infrastructure modernization, and more, All Covered ensures organizations remain resilient, agile, and focused on innovation. A consultative approach empowers clients to modernize systems and maintain business continuity at affordable prices.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind All Covered?

  • Seller: All Covered
  • Year Founded: 1997
  • HQ Location: Ramsey, New Jersey, United States
  • LinkedIn® Page: www.linkedin.com
    1,473 employees on LinkedIn®

What Are Recent G2 Reviews of All Covered?

What Are G2 Users Discussing About All Covered?

BAE Systems

BAE Systems is a global defence, aerospace and security company employing around 88,200 people worldwide. Our wide-ranging products and services cover air, land and naval forces, as well as advanced electronics, security, information technology, and support services.

Average Rating: 1.5/5.0

Total Reviews: 1

Who Is the Company Behind BAE Systems?

  • Seller: BAE Systems
  • Year Founded: 2016
  • HQ Location: Falls Church, US
  • Twitter: @BAES_Careers
    1,914 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    17,268 employees on LinkedIn®
  • Ownership: LON: BA

Who Uses This Product?

  • Company Size: 100% Medium

What Are G2 Users Discussing About BAE Systems?

Clear Infosec

Clear InfoSec is a wholly owned information security subsidiary of Ana-Data Consulting Inc. Founded in 1993, Ana-Data is an Inc. 5000 full-service IT company, a Minority-Owned Business Enterprise (MBE). Clear Infosec's information security services and proprietary tools are certified as reliable and effective by the companies focusing on business cybersecurity. Our services are essentially based on the best practices, provided by the certified professionals and cyber engineers vastly experienced in information security.

Average Rating: 4.5/5.0

Total Reviews: 1

Who Is the Company Behind Clear Infosec?

What Are Recent G2 Reviews of Clear Infosec?

What Are G2 Users Discussing About Clear Infosec?

Communication Square

Communication Square drives your firm to digital horizons. With a digital footprint across the globe, we are trusted to provide cloud users with ready solutions to help manage, migrate, and protect their data. Founded in 2015, Communication Square has succeeding in achieving recognition in its early years. A Microsoft Gold Partner for 5 years, Communication Square prides itself in holding 9 gold and 11 silver competencies. We are based in the United States, Europe, and Southeast Asia. As a Cloud Service Provider we specialize in deploying Microsoft Solutions to enable business productivity, collaboration, and Cloud security.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind Communication Square?

Who Uses This Product?

  • Company Size: 100% Medium

What Are Recent G2 Reviews of Communication Square?

Lauren Worth
LW
Researched and written by Lauren Worth
Updated October 12, 2026