Find reliable cybersecurity companies in Greenville, South Carolina, to enhance your online security. DesignRush connects you with agencies that Fortune 500 brands trust, including NHS and Abbvie. With over 100,000 client-agency matches made each month and 40,000+ vetted agencies, you can be confident in your choice. Compare providers by industry expertise, client type, budget, reviews, team size, and portfolio.

Best Greenville Cybersecurity Firm Rankings

7 Companies - Rankings updated: August 13, 2026

All agencies are evaluated on DesignRush for demonstrated expertise and authentic client reviews to support your decision. Certain placements are paid.

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United States × South Carolina × Greenville ×

  • Elliott Davis

    Forward Thinking, Lasting Solutions.

    Forward Thinking, Lasting Solutions.

    Elliott Davis provides accounting, tax and consulting services to diverse companies in a wide-range of industries.Elliott Davis is a leading business solutions provider offering a full spectrum of services in the areas of tax, comprehensive assurance, and consulting services to diverse businesses...

    Top Services:

    • Cybersecurity
    • Accounting
    • IT Services
    Location
    Greenville, South Carolina
    Number of Employees
    500 - 999
    View Profile
    5.0 5.0 (1)

  • Deloitte

    Collaborating for Lasting Impact in Business Consulting

    Collaborating for Lasting Impact in Business Consulting

    Join us at Deloitte, where we believe that our collective influence is the cornerstone of our value. With a rich legacy spanning over 175 years and a global network encompassing 150 countries, we empower remarkable achievements, solve complex problems, and drive meaningful progress for clients, professionals...

    Top Services:

    • Business Consulting
    • Accounting
    • HR Outsourcing
    • Big Data Analytics
    • CRM Consulting
    • Show more
    Location
    Greenville, South Carolina
    Number of Employees
    1000 & Up
    Portfolios Count
    6 Projects Listed
    View Profile
    3.4 3.4 (83)

  • Forvis Mazars US

    Delivering Unmatched Accounting Services.

    Delivering Unmatched Accounting Services.

    Forvis Mazars is a leading public accounting firm ranked among the top 10 in the nation. With a forward vision and unwavering commitment to unmatched client experiences, we redefine excellence in the industry. Formed through the merger of two esteemed firms, BKD and DHG, FORVIS combines legacy and innovation...

    Top Services:

    • Business Consulting
    • Accounting
    • Cybersecurity
    • IT Services
    • Show more
    Location
    Greenville, South Carolina
    Number of Employees
    1000 & Up
    View Profile

  • Protiviti

    Global Business Consulting Excellence

    Global Business Consulting Excellence

    Protiviti is a global consulting firm that offers deep expertise, objective insights, and tailored solutions to empower leaders in tackling future challenges. With a comprehensive range of services spanning finance, technology, operations, data, analytics, governance, risk, and internal audit, we serve...

    Top Services:

    • Business Consulting
    • IT Compliance Solution
    • Big Data Analytics
    • IT Services
    • Cybersecurity
    • Show more
    Location
    Greenville, South Carolina
    Number of Employees
    1000 & Up
    Portfolios Count
    5 Projects Listed
    View Profile
    5.0 5.0 (1)

  • Corsica Technologies

    Award-winning IT and cybersecurity services.

    Award-winning IT and cybersecurity services.

    Corsica Technologies is constantly regarded as one of the best managed IT and cybersecurity providers. Additionally, Corsica Technologies assists businesses in using technology as a means of gaining a competitive edge in their company operations. Your IT strategy will be more cohesive as a result of our...

    Top Services:

    • Managed Services
    • IT Services
    • Cybersecurity
    • Cloud Consulting
    • AI Development
    • Show more
    Location
    Greenville, South Carolina
    Number of Employees
    100 - 249
    View Profile
    3.7 3.7 (7)

  • EY

    Building A Better Working World

    Building A Better Working World

    EY offers Accounting, Business Consulting, and IT Services with a mission to build a better working world. It provides insights and quality services that instill trust in global capital markets and economies. EY focuses on developing exceptional leaders who deliver on their commitments to all stakeholders...

    Top Services:

    • Business Consulting
    • HR Outsourcing
    • Accounting
    • Cybersecurity
    • IT Services
    • Show more
    Location
    Greenville, South Carolina
    Number of Employees
    1000 & Up
    View Profile

  • BDO

    IDEAS | PEOPLE | TRUST

    IDEAS | PEOPLE | TRUST

    BDO is a trusted adviser to clients seeking project management, audit, tax, and business consulting services. As one of the worlds leading audit and accounting organisations, we have clients of all types and sizes from large corporate organisations to private businesses, entrepreneurs and individuals across...

    Top Services:

    • Business Consulting
    • Accounting
    • BPO
    • HR Outsourcing
    • Market Research
    • Show more
    Location
    Greenville, South Carolina
    Number of Employees
    Under 49
    View Profile
    4.3 4.3 (6)

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