Explore the best cybersecurity agencies in Charleston, South Carolina, to safeguard your digital assets. DesignRush features firms that have worked with trusted names like NHS and Abbvie. With over 1M monthly visitors and 40,000+ vetted agencies, our platform is designed to connect you with the right experts for your needs. Compare providers by industry expertise, client type, budget, reviews, team size, and portfolio.

Best Charleston Cybersecurity Firm Rankings

4 Companies - Rankings updated: June 30, 2026

DesignRush evaluates each agency using expert assessment and client feedback to inform your choices. Some featured agencies have paid placements.

United States × South Carolina × Charleston ×
  • 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.  [... view Forvis Mazars US profile ]

    Top Services:

    • Cybersecurity
    • IT Services
    Location
    Charleston, South Carolina
    Number of Employees
    1000 & Up
  • Smart Data, Seamless Integration.

    Smart Data, Seamless Integration.

    Whether it is Big Data, Legacy Data, Complex Data, Integrating Data or Data People...Modulant knows data. Fortune 1,000 companies, federal government agencies and local governments have relied on Modulant for data management, systems integration, software development and IT staffing solutions that improve  [... view Modulant profile ]

    Top Services:

    • Cybersecurity
    • IT Services
    • Software Development
    Location
    Charleston, South Carolina
    Number of Employees
    100 - 249
    Average Hourly Rate
    $100/hr
  • Accounting & Cybersecurity Experts

    Accounting & Cybersecurity Experts

    Johnson Lambert was formed in 1986 in the Washington, DC area by Larry Johnson and Debbie Lambert, Partners Emeriti. Prior to the formation of Johnson Lambert, Larry and Debbie were both affiliated with Ernst & Whinney (now EY), where they were active leaders in the firm’s insurance practice.  [... view Johnson Lambert profile ]

    Top Services:

    • Cybersecurity
    Location
    Charleston, South Carolina
    Number of Employees
    100 - 249
  • Secure, Smart, Scalable Solutions.

    Secure, Smart, Scalable Solutions.

    CodeLynx INC is a software engineering and electronic security services provider based in Charleston, South Carolina.  [... view CodeLynx profile ]

    Top Services:

    • Cybersecurity
    • IT Services
    • Software Development
    Location
    Charleston, South Carolina
    Number of Employees
    Under 49
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $25,000 - $50,000

About The Author and Expert Reviewer

Selina Garcia has authored 500+ articles and edited 50+ published books in economics, law, and history. Her unique blend of experiences allows her to approach content creation from a well-rounded perspective. Currently, Selina applies her expertise to producing insightful articles on IT, software, and applications for DesignRush.

Former Development Director

Sergio is a technology leader with over six years of experience managing global teams and delivering projects across fintech, sportstech, and B2B platforms. At DesignRush, he drove product growth and development execution, building tools that speed up processes by 95% and cut costs by 35% while maintaining full uptime.