Cybersecurity Startups

Raon is a South Korean IT group that develops AI-based security and authentication platforms, including biometric and simple authentication solutions. It operates multiple affiliates such as RaonSecure, RaonMeta, and RaonVentures serving global security and identity verification needs.

1 investor

Rapid Ascent offers an interactive enterprise training platform that simulates real-world cybersecurity environments for professionals to develop and demonstrate hands-on skills in roles like SOC analyst, threat hunter, and penetration tester. The platform provides industry-specific training scenarios across critical infrastructure, finance, healthcare, and aerospace sectors, with AI-guided learning paths and employer-verified skill assessments.

1 investor

Ray Security offers a platform that discovers and controls AI tools — including copilots, agents, and LLMs, whether sanctioned or shadow — that access an organization's data, and automatically remediates unnecessary exposure. It continuously monitors AI interactions with sensitive data and blocks abnormal activity to reduce data-security risk.

1 investor

RAYVN is a digital platform for emergency preparedness and critical event management that enables coordination among emergency response teams during crisis situations.

1 investor

Realm Labs develops a technique called Deep Neural Inspection to detect and prevent malicious behavior in large language models by reading their internal mathematical representations. The company serves enterprises deploying AI systems that require security oversight and accountability.

1 investor

RealmOne provides advanced analytics, cybersecurity, and data science solutions for national security and defense, serving U.S. government and defense institutions. The company specializes in data mining, predictive modeling, machine learning, and statistical analysis for mission-critical decision-making.

1 investor

RealNetworks develops AI-powered facial recognition technology (SAFR) for security professionals, along with video playback and gaming products for consumer devices. Its offerings span computer vision security tools and media/entertainment software.

1 investor

ReasonLabs offers an all-in-one online security platform, powered by AI, that protects consumers and their families from scams, fraud, malware, and cyber threats. Its features include dark web identity monitoring, EDR-based antivirus protection, VPN privacy, anti-phishing tools, ad blocking, and parental controls.

1 investor

Recheck provides a trust and compliance platform for the residential solar industry, offering verified identity verification, certified representative credentials, risk signal sharing, and license compliance management on a shared network.

1 investor

RedPill provides a privacy-focused AI gateway that routes requests to private GPU models running inside trusted execution environments (TEEs), returning signed receipts, attestation reports, and audit evidence. It offers developers an OpenAI-compatible API aggregating models across networks like Phala, Tinfoil, and NEAR AI, serving regulated industries such as law firms, healthcare, and security companies.

1 investor

Redcoat AI provides a cybersecurity platform focused on defending organizations against AI-driven social engineering attacks such as phishing, smishing, and deepfake impersonation. It offers red-teaming simulations, vulnerability assessments, and a mobile defense app for enterprise security teams.

1 investor

Redhorse is a federal consulting firm delivering mission-ready technology solutions and services to the U.S. Department of Defense, Intelligence Community, and federal civilian agencies. The company provides consulting, cyber analytics, enterprise services, and national security-focused technology solutions for government customers.

1 investor

RedShield provides a managed web application security service that "shields" vulnerabilities in apps and APIs by rewriting requests and responses at the application layer to fix flaws in real time without code changes. It serves organisations in government, financial services, and critical infrastructure to close the gap between vulnerability discovery and remediation.

1 investor

Red Sift provides email authentication and brand protection tools that help security teams implement and enforce DMARC, SPF, DKIM, and related protocols to prevent phishing and domain impersonation attacks.

1 investor

1 investor

Reflectiz provides an agentless security platform that continuously monitors client-side web activity to detect and prioritize security, privacy, and compliance risks for organizations across financial services, e-commerce, and healthcare.

1 investor

Reflex is an incident response readiness platform that uses AI agents to build adaptive cybersecurity crisis simulations from a company's real environment, replacing traditional slide-based tabletop exercises. It lets security, legal, and executive teams rehearse breach response under live pressure and generates automatic after-action reports assessing the team's performance.

1 investor

Rein provides security solutions designed specifically for enterprise agents, offering execution context-aware protection that operates at the agent runtime level rather than through traditional network gateways or proxies.

1 investor

Remote Threat provides offensive cybersecurity operations platform designed for both human and machine users in a new operational paradigm.

1 investor

Repacket builds security software that detects and prevents employee mistakes in real time. The product is positioned as an AI-powered secure web gateway for enterprise security teams.

1 investor

Repello builds AI security tooling that gives enterprises visibility into AI agents (such as Claude Code, Cursor, Codex, Copilot and browser agents) running on employee workstations, detecting and blocking credential access, unsafe commands and unknown outbound connections. Its platform combines AI asset inventory, adversarial red teaming and runtime guardrails, deployable through existing EDR and MDM tools, to secure AI systems across production environments.

1 investor

Resec provides malware protection for removable devices by sandboxing file transfers to PCs and enabling secure access without blocking device usage. The solution serves enterprise organizations seeking to balance security with usability for external storage devices.

1 investor

Respect Network provides digital forensics and investigation services for individuals and organizations targeted by online harassment, impersonation, coordinated attacks, and anonymous threats. The company analyzes digital evidence, online behavior, and technical indicators to identify malicious actors, preserve evidence, and support legal escalation.

1 investor

RiskImmune is an AI governance and GRC platform that discovers both authorized and unauthorized AI tools used across an organization, scores them for risk using open-source intelligence signals, and generates compliance evidence for DORA, NIS2, ISO 27001, and other regulatory frameworks. It serves CISOs, GRC teams, and security personnel in financial services, fintech, healthcare, and critical infrastructure organizations.

1 investor