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Security and Privacy Companies
Review leading managed security services providers (mssps) companies serving USA clients, with company profiles that explain each provider's expertise, delivery focus and fit.
Use the comparison to build a shortlist, then review each company profile for its specialty, location and approach.
Updated October 10, 2026
Side-by-side comparison of leading providers serving USA clients
| Company | Specialty | Location | Website |
|---|---|---|---|
| #1IBM Security | Global SOC network delivering MDR, managed SIEM, managed endpoint security and cloud security services, built on the QRadar SIEM platform and powered by… | Armonk, NY, USA | Visit site |
| #2Accenture Security | Named consistently among the leading MSSPs, combining managed detection and response with a large security consulting practice and global delivery footp… | Dublin, Ireland | Visit site |
| #3Secureworks | Pure-play managed security provider named among the top MSSPs, delivering managed detection and response and security operations built on its own detect… | Atlanta, GA, USA | Visit site |
| #4Trustwave | CREST-accredited provider included in MSSP Alert Top 10 MSS Providers for eight consecutive years. | Chicago, IL, USA | Visit site |
| #5Arctic Wolf | One of the fastest-growing MSSPs, built around Security Operations as a Service combining monitoring technology with a concierge security team model ass… | Eden Prairie, MN, USA | Visit site |
| #6Verizon Business | Telecommunications-backed managed security provider named among the leading MSSP companies, with global network visibility feeding its threat detection… | New York, NY, USA | Visit site |
| #7AT&T Cybersecurity (LevelBlue) | Managed security business named among the top MSSPs. | Dallas, TX, USA | Visit site |
| #8Optiv | Security solutions integrator and managed services provider, combining MSSP delivery with advisory and technology integration across a broad vendor port… | Denver, CO, USA | Visit site |
| #9NCC Group | Cyber security firm delivering managed detection and response alongside a large offensive security practice - one of the CREST-accredited providers appe… | Manchester, United Kingdom | Visit site |
| #10Kaseya (Kaseya MDR) | MDR built for MSPs and IT teams, rebuilt for 2026 as an AI-powered detection and response platform. | Miami, FL, USA | Visit site |
Use this comparison to identify a shortlist, then review the detailed company profiles and USA buyer’s guide below.
Review the available information for each provider before requesting references, pricing and a project proposal.
Global SOC network delivering MDR, managed SIEM, managed endpoint security and cloud security services, built on the QRadar SIEM platform and powered by the X-Force threat intelligence and incident response team. Offers both fully managed and co-managed SOC models.
Visit website →Named consistently among the leading MSSPs, combining managed detection and response with a large security consulting practice and global delivery footprint.
Visit website →Pure-play managed security provider named among the top MSSPs, delivering managed detection and response and security operations built on its own detection platform and threat research.
Visit website →CREST-accredited provider included in MSSP Alert Top 10 MSS Providers for eight consecutive years. Delivers 24/7 MDR, managed vulnerability scanning, firewall and technology management, and co-managed SOC, plus 200,000 penetration testing hours annually.
Visit website →One of the fastest-growing MSSPs, built around Security Operations as a Service combining monitoring technology with a concierge security team model assigning named experts to each customer.
Visit website →Telecommunications-backed managed security provider named among the leading MSSP companies, with global network visibility feeding its threat detection services.
Visit website →Managed security business named among the top MSSPs. Note the business now trades as LevelBlue following its separation from AT&T - several 2026 sources still list it under the former name.
Visit website →Security solutions integrator and managed services provider, combining MSSP delivery with advisory and technology integration across a broad vendor portfolio.
Visit website →Cyber security firm delivering managed detection and response alongside a large offensive security practice - one of the CREST-accredited providers appearing on both this tab and the Penetration Testing tab.
Visit website →MDR built for MSPs and IT teams, rebuilt for 2026 as an AI-powered detection and response platform. Operates a SOC 2 and HIPAA-certified managed SOC with direct PSA and RMM integration for partner delivery.
Visit website →Compare delivery models, rates, contracts and risk before selecting a provider for a US engagement.
This page lists 10 managed security services providers (mssps) companies providers that work with United States clients. We look at delivery track record, whether the team overlaps with US time zones, how they scope and price work, and whether they can sign standard US contracts including an MSA, SOW, NDA and mutual indemnity.
Firms currently featured include IBM Security, Accenture Security, Secureworks, and Trustwave.
Delivery footprints on this list span Armonk, NY, USA, Dublin, Ireland, Atlanta, GA, USA, and Chicago, IL, USA, so you can choose between onshore US delivery, nearshore teams with 3–5 hours of overlap, and offshore teams priced for volume work.
US buyers usually see three engagement models for managed security services providers (mssps) companies: fixed-scope projects, time and materials with a monthly cap, and a dedicated team retainer. Onshore US consultancies typically bill $149–$250 per hour, nearshore partners in Latin America $55–$95, and offshore teams $25–$55.
Ask for a rate card by role, not a blended rate — a blended number hides how much of the work is done by junior staff. For fixed-bid work, insist on a written change-order process, and for retainers, confirm the notice period and any minimum monthly hours.
Watch the total cost of ownership: discovery workshops, knowledge transfer, post-launch support, and the cost of taking the work back in house at the end.
Before you sign, confirm the provider carries professional liability (E&O) and cyber insurance with US-acceptable limits, and that the MSA clearly assigns IP ownership of all deliverables to you on payment.
If the engagement touches regulated data, get the compliance posture in writing: SOC 2 Type II for the provider's own systems, HIPAA with a signed BAA for health data, CCPA/CPRA handling for California consumer data, GLBA for financial services, and background-check policies for anyone with production access.
Also nail down worker classification and subcontracting — many US buyers require written approval before any part of the work is passed to a third party.
Run the same questions past two or three firms from this list and compare the answers side by side — the differences are usually more revealing than the proposals.
Practical answers for USA clients comparing providers, pricing and engagement models.
