Top California Cybersecurity Startups (170)

Adaptive is a next-generation cybersecurity platform. We're working with pioneering security teams to protect critical systems from AI-powered cyber attacks. Our customers today include one of the largest payment aggregators in the United States, hedge funds and private equity firms, regional and national banks, leading technology companies, and critical healthcare systems. Join us in building the future of cybersecurity.

Bee Techy is a top-tier, remote-first software development agency that builds high-quality digital products with precision, speed, and reliability. We specialize in web and mobile development, AI-driven solutions, and end-to-end engineering support for startups and fast-growing companies. Our team delivers clean, scalable, and production-ready systems that help businesses move faster and innovate confidently. As a growing engineering team, we’re actively hiring...

Mondoo is a powerful security, compliance, and asset inventory tool that helps businesses identify vulnerabilities, track lost assets, and ensure policy compliance across their entire infrastructure. Our eXtensible Security Posture Management (XSPM) platform is built on open-source components like cnquery and cnspec, giving customers complete transparency and control over how their data is processed. With Mondoo, you can easily integrate...

Horizon3.ai's mission is to help you find and fix attack vectors before attackers can exploit them. NodeZero, our autonomous penetration testing solution, enables organizations to continuously assess the security posture of their enterprise, including external, identity, on-prem, IoT, and cloud attack surfaces. Like APTs, ransomware, and other threat actors, our algorithms discover and fingerprint your attack surface, identifying the ways...

Cloudanix is code-to-cloud security platform. We integrate with your code repositories, cloud accounts and your workloads (vm/ kubernetes) and keep the bad guys out. We are YCombinator backed.

Stellar Cyber Open XDR platform delivers comprehensive, unified security without complexity, empowering lean security teams of any skill to successfully secure their environments. With Stellar Cyber, organizations reduce risk with early and precise identification and remediation of threats while slashing costs, retaining investments in existing tools, and improving analyst productivity, delivering a 20X improvement in MTTD and an 8X improvement...

G2 Ops is a preferred provider of analytical and innovative solutions in the following areas: - Model-Based Systems Engineering - Cybersecurity Requirements, Analysis, and Threat Assessment - Cybersecurity Consulting Strategic vision: G2 Ops helps companies stay ahead of cyber crime and IT threats by identifying and measuring weaknesses before incidents occur, then providing remediation priorities based on individual business and financial risk thresholds.

Fortune 500 companies rely on XYPRO to secure their systems. Our diverse 700+ customer base includes the world’s leaders in finance, telecommunications, manufacturing, retail, and government. The XYGATE solution includes risk management, analytics, authentication, privileged privileged access management, auditing and compliance.

The Opal security platform, backed by Greylock, enables organizations to implement least privilege at scale. Through a combination of insights and workflows, Opal decentralizes access management away from overburdened teams. Without using agents or proxies, Opal is deployed on-premise and cloud in minutes. Opal is based in San Francisco and New York. For more information, please visit www.opal.dev or reach...

In today's world, most successful cyberattacks start by a human failure. We're making the platform that makes it easy to prepare your employees for cyberattacks, in a way they love.

Valence enables security teams to find and fix SaaS risks. As SaaS complexity and distributed management present security challenges, the Valence SaaS security platform provides unparalleled and actionable insights into configuration, identity, data, SaaS-to-SaaS integration, and GenAI risks. The Valence platform offers comprehensive SaaS security posture management (SSPM), risk remediation, and identity threat detection and response (ITDR). Valence’s unique remediation...

Tevora is a specialized management consultancy focused on cybersecurity, risk and compliance services.

Proficio is a world-class Managed Security Service Provider (MSSP) providing managed detection and response solutions, 24×7 security monitoring and advanced data breach prevention services to organizations globally. Our rapid growth is being fueled by the rise in cloud-based services, the acceptance of the Software-as-a-Service (SaaS) model, and the increasing number of cyber security attacks on businesses, hospitals and government. We...

Since our founding in 2003 in Los Angeles, California, we’ve spent the last twenty years building on our expertise as trusted technology advisers and vendors for the media & entertainment, and architecture industries. Our staff of technology specialists and VFX pipeline engineers are known for their innovative approach to problem-solving and trusted for their expertise in architecting client-centric production...

RealDefense develops and markets consumer and enterprise privacy and security applications and services.

Rebel Space Technologies is a space and cybersecurity company developing autonomous threat recognition and response software for wireless communication networks. Our mission is to protect and optimize networks with intelligent systems, securing humanity's hyper-connected infrastructure from Earth to deep space.

Organizations of all sizes use AISLE to autonomously discover and remediate critical vulnerabilities at superhuman speed and depth. We secure the entire software stack — from operating systems, libraries, and protocols to the application layer — so teams can build, deploy, and innovate faster and more securely.

DuploCloud offers an end-to-end DevOps software platform for dev teams that don’t have dedicated DevOps engineers and augments those that do. The platform automates the provisioning of your application to the cloud (AWS, GCP, Azure), integrating cloud ops, DevOps, and security/compliance with 24x7 monitoring and support. The software runs in your cloud account and is accessed thru our UI, Terraform...

U.S. Venture Partners (USVP) is a leading Silicon valley-based venture capital firm, helping entrepreneurs build world-class companies since 1981. U.S. Venture Partners (USVP), is a venture capital investment firm headquartered in Menlo Park, California in the heart of Silicon Valley focusing on investments in an array of segments including enterprise software, cyber security, consumer, e-commerce, healthcare, and IT-enabled healthcare services. Since...

Halcyon is a cybersecurity company building products that stop ransomware from impacting enterprise customers. Halcyon's core platform offers layered ransomware protection that combines pre-execution detection, behavioral modeling, deception techniques and, if all else fails, resiliency, recovery and isolation of impacted nodes. To learn more and get a demo, contact us today.