Cybersecurity Startups
3,552 companies tagged Cybersecurity, with their investors and founders.
Oak provides identity management solutions for enterprise organizations, with implementation support for Fortune 500 companies.
3 investors
Oasis Security provides management and security solutions for non-human identities across hybrid cloud environments. The platform uses AI-based analytics to discover, assess risk, and govern non-human identities while supporting compliance and remediation across organizations.
3 investors
Observo provides AI-powered telemetry filtering for Security Information and Event Management (SIEM) systems, automatically identifying and reducing low-value logs to minimize data ingestion volume. The solution targets security teams looking to reduce noise and costs while maintaining detection capability.
3 investors
Octane builds an AI-native security analysis tool that continuously reasons about code to find novel vulnerabilities across functions, files, and execution paths. It targets teams that have used scanners, static analyzers, and manual audits but still ship bugs, aiming to embed security analysis directly into the development workflow.
3 investors
Odin builds security and workforce technology for construction sites and critical infrastructure projects such as data centers, combining software with on-site security operations. It serves construction firms and subcontractors, with a focus on making jobsites safer and more efficient.
3 investors
Olympix provides a security tool for smart contract development that deterministically analyzes Solidity code to detect and remediate vulnerabilities before audits and deployment. It serves blockchain teams, DeFi protocols, and enterprises managing high-value on-chain assets, combining symbolic execution, fuzzing, custom detectors, and AI to produce audit-level findings and automated test coverage.
3 investors
OMNIA builds a multi-chain privacy layer for Web3, offering decentralized RPC gateways that anonymize wallet and dApp traffic, block MEV/front-running via private mempool routing, and strip metadata leakage. It also develops Fully Homomorphic Encryption infrastructure for privacy-preserving computation and AI inference, serving enterprise wallets, dApps, and infrastructure providers.
3 investors
OneLayer provides a security and management platform for enterprise private cellular networks, adding cybersecurity, observability, and operational orchestration for connected devices. It serves enterprises deploying private cellular and IoT connectivity for critical operations.
3 investors
Oort provided identity security and threat detection, now part of Cisco as Cisco Identity Intelligence, offering visibility into an organization's identity population and helping move toward passwordless authentication. It serves enterprise security teams protecting identity infrastructure.
3 investors
Oosto develops computer vision AI that provides face, body, and action recognition algorithms to help organizations protect people, premises, and profits. Its technology emphasizes privacy-enhancing features, accuracy, and reduced bias for security-related applications.
3 investors
Opal provides an identity governance platform that applies access controls across human users, AI agents, applications, and infrastructure from a single layer. It offers just-in-time privileged access, automated access reviews, and audit logging aimed at enterprises and regulated environments.
3 investors
OPAQUE provides a hardware-enforced trust layer for AI systems that enables organizations to run AI on sensitive data with independently verifiable proof of data protection. The platform combines software governance with confidential computing to constrain agent behavior and prevent unauthorized data access.
3 investors
Operant AI provides a runtime defense platform that protects cloud and AI applications across infrastructure and APIs through continuous discovery, detection, and defense capabilities. The platform defends against runtime attacks including data exfiltration, supply chain attacks, model theft, and prompt injection for development, security, and operations teams.
3 investors
Opscompass is a software asset intelligence platform that provides real-time visibility into cloud, on-prem, and database environments, tracking configuration drift, security and compliance checks, and software licensing costs. It serves IT and infrastructure teams managing hybrid and multi-cloud environments, offering automated asset discovery, cost optimization insights, and AI-powered summaries.
3 investors
Opti provides AI-native identity and access management (IAM) software for enterprises, automating privilege management and access decisions through domain-trained machine learning models. The platform integrates with existing directories and applications to enforce least-privilege access and continuous compliance.
3 investors
ORION is a unified data security platform that provides data loss prevention across endpoints, browsers, SaaS applications, email, AI tools, and agentic workflows. It analyzes the intent and context of data movement to produce automatic verdicts, addressing risks such as shadow AI, insider threats, and external sharing for businesses.
3 investors
Own provides SaaS data protection and backup solutions for organizations operating in the cloud, ensuring data resilience, compliance, and security. The company operates as part of Salesforce, helping businesses safeguard their cloud-based data infrastructure.
3 investors
Own provides data protection and management solutions for organizations using cloud-based systems, focusing on data security, compliance, and resilience for AI-driven workloads. The company operates as part of Salesforce.
3 investors
OwnID offers a fraud prevention and identity trust platform combining face liveness detection, a biometric fraud bureau of 170M+ identities, and passwordless multi-factor authentication. It targets enterprises seeking to detect sophisticated identity fraud, reduce false acceptance and rejection rates, and improve onboarding conversion.
3 investors
Parakeet Security provides security solutions for voice AI agents, helping frontier labs and enterprises protect against emerging risks in voice AI systems.
3 investors
Partisia Blockchain offers a Digital Trust Architecture that lets organizations and individuals use and collaborate on data without exposing it, using secure multi-party computation across off-chain and on-chain environments. It provides open-source technology, developer tooling, templates, and pre-built solutions for enterprises building data-driven applications and infrastructure.
3 investors
Patchstack is a security platform that helps make open-source software safer. The company serves developers and organizations using open-source projects.
3 investors
Periphery develops embedded security technology to protect cyber-physical systems in critical infrastructure from sophisticated threats. The company uses intelligence-led models and centralized AI to enable faster threat detection and identification across distributed edge devices.
3 investors
Phylax builds the Credible Layer, a policy engine that lets on-chain protocols declare states they must never reach and enforces circuit breakers that reject transactions crossing those limits. It publishes verifiable evidence for auditors, allocators, and insurers to review, serving crypto protocols and the capital teams that oversee them.
3 investors

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