The 10 Best Cyber Security Companies in California - 2025 Reviews

Top Cyber Security Companies in California

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Safeguard your digital assets with California's leading cyber security companies. Our curated list showcases top-tier experts in network protection, threat detection, and data privacy. Explore each company's track record and client testimonials to find the perfect match for your security needs. Whether you're seeking robust firewalls, penetration testing, or comprehensive security audits, you'll discover specialists equipped to fortify your digital infrastructure. Sortlist enables you to post your specific cyber security requirements, allowing California's finest security professionals to reach out with tailored solutions designed to protect your business in today's ever-evolving threat landscape.

Top Featured Cyber Security Companies

All Cyber Security Services in California

  • 5
    (11 reviews)

    Where your ideas turn into code and interfaces

    Top awarded
    We know how to create business value, not just another piece of software. Yellow has already helped 220+ businesses succeed on the market. WE FOCUS ON: ✔Arificial Intelligence ✔Machine Learning ✔Data Science ✔Chat and Chatbot Development ✔UX/UI Design Our team is ready to help you realize your mobile or web solution. Whether you are a brand new startup or an established enterprise, we are ready to help you build maintainable, scalable, and future-proof software. WHY US? ✔Business before technology ✔Cross-review ✔Daily communication ✔Clients participate in development ✔No suspicious processes ✔Post-launch support Let’s build a great software solution together: hi@yellow.systems
    1 work in Cyber Security
    Located in San Francisco, United States
    Budget on request
    Worked in Tobacco (+9)
    Speaks English
    51-200 members
  • We at Forum Info-Tech are proud to be one of the leading Managed IT Services Providers based in Corona, Los Angeles, and Orange County. Our skillful team of experienced engineers keeps your systems running smoothly while you focus on driving your business. While there are many Managed IT service provider options, we stand above all when it comes to service. We customize your solution only after understanding your goals and vision. Our reliability and responsiveness make us the IT support services provider of choice. We provide a wide range of IT services nationwide from application hosting to onsite management. From handling cyber security issues to providing IT or Cloud consulting, we deliver a variety of exceptional solutions to our clients. If you are looking for a firm that provides quality IT support in Orange County, look no more. Contact us immediately. We have expertise in the following: Managed IT Services & Support Onsite Managed Services & IT Support Unified Communication Managed Marketing Services Visual Communication Cyber Security Services & Solutions
    Looking for work in Cyber Security
    Located in Corona, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    11-50 members
  • (0 review)

    Better Navigation, Better Experiences

    Leveraging AI-driven insights and advanced technologies, we empower businesses to create impactful, inclusive, and future-ready digital experiences. Whether it's enhancing website accessibility through our website accessibility checker, optimizing metrics, fortifying cybersecurity, delivering marketing expertise, or building scalable web solutions, NavEase is your partner in achieving digital excellence. Join us in making every interaction seamless, secure, and meaningful.
    Looking for work in Cyber Security
    Located in San Jose, United States
    From €0 for Cyber Security
    Works in multiple industries
    Speaks English
    11-50 members
  • (0 review)

    Unlock secure collaboration with compliance-ready privacy-enhancing technology.

    Unlock secure collaboration with compliance-ready privacy-enhancing technology. Real-time searchable encryption and fine-grained access control so you don't have to choose between data protection and innovation.
    Looking for work in Cyber Security
    Located in Los Angeles, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English, Portuguese
    1-10 members
  • We at Forum Info-Tech are proud to be one of the leading Managed IT Services Providers based in Corona, Los Angeles, and Orange County. Our skillful team of experienced engineers keeps your systems running smoothly while you focus on driving your business. While there are many Managed IT service provider options, we stand above all when it comes to service. We customize your solution only after understanding your goals and vision. Our reliability and responsiveness make us the IT support services provider of choice. We provide a wide range of IT services nationwide from application hosting to onsite management. From handling cyber security issues to providing IT or Cloud consulting, we deliver a variety of exceptional solutions to our clients. If you are looking for a firm that provides quality IT support in Orange County, look no more. Contact us immediately.  
    Looking for work in Cyber Security
    Located in Nevada City, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    11-50 members
  • 4.8
    (12 reviews)

    Pioneering digital innovation

    Eurisko is a multi-national software development and consultancy firm based in UAE, Saudi Arabia, Lebanon, Cyprus and US. With more than 13 years of experience and hundreds of success stories, Eurisko offers services ranging from Mobile App Development, Enterprise Web Development and Artificial Intelligence, to Game Development, Mixed Reality, UI/UX Design and Smart Cities / IoT. To position our company as the pioneer of digital innovation in the region by creating excellence in our people and forging the digital future of our clients and partners. Our mission is to empower digital transformation by delivering cutting-edge solutions and world-class digital services to our clients & partners. Our goal is to reshape their success, providing them with a distinctive competitive advantage, unlocking limitless possibilities, and driving meaningful impact in their industry landscapes. Eurisko has a proven history of excellence in various domains and has been at the forefront of driving progress in Artificial Intelligence and Data Analytics for several years. Our proficiency in these areas allows us to harness state-of-the-art algorithms and data-driven insights, enabling us to deliver groundbreaking solutions to our clients. At Eurisko, our steadfast dedication to pushing the limits of innovation has firmly established us as a pioneering influence at the intersection of technology and creativity within the Middle East.
    Looking for work in Cyber Security
    Located in Beirut, Lebanon (+2)
    From €10,000 for Cyber Security
    Worked in Banking & Financials (+2)
    Speaks English, Arabic(+1)
    51-200 members
  • (0 review)
    SharkStriker is a cybersecurity vendor with a mission to simplify cybersecurity and empower MSPs through human-powered, tech-driven holistic services delivered through its unified, multi-tenant, open-architecture platform STRIEGO . With its global SOCs, it is helping businesses gain ROI from their existing security investments and address challenges like rising complexity & skills gap, multi-vendor management, and rising cost of solutions while staying compliant.
    Looking for work in Cyber Security
    Located in Walnut Creek, United States
    From €3,000 for Cyber Security
    Works in multiple industries
    Speaks English
    11-50 members
  • (0 review)
    DeepStrike is a leading cybersecurity firm specializing in human-powered, high-quality penetration testing designed to protect businesses from evolving cyber threats. Our team of world-class ethical hackers conducts real-world attack simulations, delivering actionable insights that enhance resilience and safeguard critical assets. With decades of collective experience and a track record of securing global enterprises, fintech firms, SaaS platforms, and high-growth startups, go beyond automated scans—every assessment is tailored, rigorous, and designed to withstand today’s most sophisticated threats. We have successfully secured contracts to assess national security-critical infrastructure project around the world.
    Looking for work in Cyber Security
    Located in San Francisco, United States
    From €100 for Cyber Security
    Works in multiple industries
    Speaks English
    11-50 members
  • (0 review)
    Looking for work in Cyber Security
    Located in Roseville, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    51-200 members
  • (0 review)

    User-Centric Product Insights & Design for Enterprise Software

    UXReactor Inc., headquartered in the San Francisco Bay Area, California, is a globally acclaimed consulting firm known for its excellence in user-centered design. Established in 2015 by two Harvard Business School alumni, the firm was built on a vision to scale the impact of user-centered design across organizations. Marked by rapid growth, UXReactor has been a fixture on the Inc. 5000 list as the fastest-growing specialized UX Design and Research firm for four consecutive years (2020-2023). The leadership at UXReactor is comprised of some of the most esteemed professionals in User Research and Design, each bringing over 15 years of experience from leading roles at renowned Silicon Valley organizations, including PayPal, Yahoo, eBay, TCS, UserZoom, and Citrix. Our commitment to excellence is reflected in numerous accolades, such as the Fast Company Innovation by Design award (2017) and the SF Fast100 awards, which we've secured consecutively from 2020 to 2023. These awards affirm our dedication to delivering top-tier user-centered design services and sustaining a prominent position in the market.
    2 works in Cyber Security
    Located in Pleasanton, United States
    Budget on request
    Worked in Software & Computer Services (+5)
    Speaks English, Hindi(+1)
    51-200 members
  • (0 review)

    See Beyond, Rise Above

    Persistent Systems is a global technology services company specializing in software product development and technology solutions. Established in 1990 and headquartered in Pune, India, the company operates across multiple sectors including healthcare, banking, financial services, telecommunications, and life sciences. Persistent offers a comprehensive range of services such as digital strategy and transformation, application development, product engineering, and data-driven insights, as well as cloud, security, and enterprise IT services.
    Looking for work in Cyber Security
    Located in Bridgewater, United States (+35)
    From €10,000 for Cyber Security
    Worked in Clothing & Accessories (+1)
    Speaks English
    10001+ members
  • (0 review)

    ACCELERATE DIGITAL TRANSFORMATION

    We started a dozen years ago in Silicon Valley to build a cloud orchestration platform when the cloud computing industry was nascent. Soon, the word got out about Zymr's cloud-savvy skills, and our venture capitalist friends introduced us to help their startups in cloud-native platform engineering. Over the past decade, we have perfected our cloud-scale technical skills, matured our agile development processes, and deepened our industry domain expertise. Our secret sauce lies in our design-thinking culture and our deeply talented, dedicated, full-stack cloud engineers. We are ready to assist you in your digital ecosystem engineering journey.
    Looking for work in Cyber Security
    Located in San Jose, United States
    From €1 for Cyber Security
    Works in multiple industries
    Speaks English
    201-500 members
  • (0 review)

    www.AtomicTS.com

    features We support your business IT Management One of the many services we offer at Atomic Group is IT management. This service is perfect for companies of all sizes who don’t necessarily want to keep a designated IT manager on the payroll or on site. Instead of having to find, train, and hire Compliance and Read more about Atomic Technology Solutions[…]
    Looking for work in Cyber Security
    Located in Santa Ana, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members
  • (0 review)
    DataVisor delivers a powerful fraud and risk management platform that enables organizations to respond to fraud attacks in real time.
    Looking for work in Cyber Security
    Located in San Jose, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members
  • (0 review)
    Akins IT is a Microsoft IT Consultant that provides IT consulting Newport Beach businesses and government agencies can rely on.
    Looking for work in Cyber Security
    Located in Santa Ana, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members
  • Almost four decades of customer success in Managed IT and Cloud Consulting Services. Oracle, Infor ERP solutions. Trusted by 600+ clients.
    Looking for work in Cyber Security
    Located in San Jose, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members
  • Looking for work in Cyber Security
    Located in San Jose, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members
  • (0 review)

    Building secure software for a changing world

    GoatBytes.IO is a technology company committed to developing innovative software solutions that help businesses achieve their goals. At the heart of our mission is the desire to empower companies to transform the world by providing them with secure and reliable tools that enhance their operations. We understand that technology is constantly evolving, and we strive to stay ahead of the curve by leveraging the latest advancements to create cutting-edge products that meet the needs of our clients. Our team of experts is dedicated to providing the highest level of service to our clients, from understanding their unique business requirements to delivering tailored solutions that exceed their expectations. We believe that the key to success lies in building strong relationships with our clients, and we are committed to delivering software solutions that help them achieve their goals. Our team is passionate about technology and constantly seeks new and innovative ways to improve our products and services. At GoatBytes.IO, we are committed to developing software solutions that not only meet the needs of our clients but also contribute to the greater good. We believe that technology has the power to transform society for the better, and we are dedicated to using our skills and expertise to make a positive impact on the world. By empowering businesses with secure and reliable software tools, we aim to help create a more prosperous and equitable future for all.
    Looking for work in Cyber Security
    Located in Irvine, United States
    Budget on request
    Works in multiple industries
    Speaks English
    1-10 members
  • (0 review)

    Our clients can work. Anytime. Anywhere. Securely.

    Managed IT Services & Cybersecurity in the San Francisco Bay Area and Sacramento Valley.
    Looking for work in Cyber Security
    Located in San Jose, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members
  • (0 review)

    Partnering with Businesses for 18 Years and Counting

    24hourtek specializes in IT Consulting, providing business Computer Support and Network Services in San Francisco, San Jose, Oakland, Daly City, Palo Alto, Mountain View, San Mateo and South San Francisco.
    Looking for work in Cyber Security
    Located in San Jose, United States
    From €1,000 for Cyber Security
    Works in multiple industries
    Speaks English
    1-10 members

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